CA2704917A1 - Probablistic imaging with azimuthally sensitive mwd/lwd sensors - Google Patents
Probablistic imaging with azimuthally sensitive mwd/lwd sensors Download PDFInfo
- Publication number
- CA2704917A1 CA2704917A1 CA2704917A CA2704917A CA2704917A1 CA 2704917 A1 CA2704917 A1 CA 2704917A1 CA 2704917 A CA2704917 A CA 2704917A CA 2704917 A CA2704917 A CA 2704917A CA 2704917 A1 CA2704917 A1 CA 2704917A1
- Authority
- CA
- Canada
- Prior art keywords
- sensor
- data
- azimuth
- logging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
Abstract
A method for forming a borehole image of an azimuthally sensitive borehole or formation parameter is disclosed. Such a borehole image may be formed, for example, by processing logging sensor data with a predetermined sensor response function (also referred to herein as a probability density function) to acquire probabilistically distributed sensor data. The sensor data may be distributed in either one-dimension (azimuthal) or two-dimensions (azimuthal and axial). Certain embodiments of this invention may be advantageously utilized in LWD imaging applications and provide for superior image resolution and noise rejection as compared to prior art binning techniques. Exemplary embodiments of the invention also advantageously conserve logging sensor data such that integration of the distributed data over the entire circumference of the tool provides a non-azimuthally sensitive logging measurement.
Claims (5)
1. A. method for estimating an azimuthal dependence of a parameter of a borehole using logging sensor measurements acquired as a function of sensor azimuth, the method comprising:
(a) rotating a downhole tool in a borehole, the tool including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist determination of a parameter of the borehole;
(b) causing the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair during each of predetermined first and second time periods, each of the data pairs comprising a logging sensor measurement and a corresponding azimuth;
(c) processing the data pairs acquired in (b) with a predetermined probability density function (PDF) to calculate sensor data that is probabilistically distributed in azimuth, and (d) assigning corresponding first and second borehole depth values to the probabilistically distributed sensor data determined in (c) using data pairs acquired during the first and second time periods.
(a) rotating a downhole tool in a borehole, the tool including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist determination of a parameter of the borehole;
(b) causing the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair during each of predetermined first and second time periods, each of the data pairs comprising a logging sensor measurement and a corresponding azimuth;
(c) processing the data pairs acquired in (b) with a predetermined probability density function (PDF) to calculate sensor data that is probabilistically distributed in azimuth, and (d) assigning corresponding first and second borehole depth values to the probabilistically distributed sensor data determined in (c) using data pairs acquired during the first and second time periods.
2. The method of claim 1, wherein the PDF includes a response function of the azimuthal sensitivity of the logging sensor.
3. The method of claim 1, wherein the PDF includes a response function of the azimuthal sensitivity of the azimuth sensor.
4. The method of claim 1, wherein the PDF is a discrete function.
5. The method of claim 1, wherein the logging sensor is selected from the group consisting of a natural gamma ray sensor, a neutron sensor, a density sensor, a resistivity sensor, a micro-resistivity sensor, a formation pressure sensor, an annular pressure sensor, an ultrasonic;
sensor, an audio-frequency acoustic sensor, and a physical caliper.
group consisting of formation density, formation resistivity, formation acoustic velocity, gamma ray interaction cross section, neutron interaction cross section, and caliper interaction cross section.
7. The method of claim 1, wherein the tool further comprises a controller, the controller disposed to cause the at least one logging sensor and the at least one azimuth sensor to acquire the plurality of data pairs in (b), the controller further disposed to process the data pairs with a predetermined PDF in (c).
8. The method of claim 1, wherein the at least one logging sensor and the at least one azimuth sensor acquire the plurality of data pairs in (b) during rotation of the tool in (a).
9. The method of claim 1, wherein:
the logging sensor measurements acquired in (b) are stored in a one-dimensional temporary image array; and the sensor data is probabilistically distributed in (c) via multiplying the temporary image array with the PDF.
10-12 (canceled).
13. The method of claim 1, wherein the sensor data is probabilistically distributed in first and second, azimuthal and axial dimensions.
14-15 (canceled).
16. A method for forming an image of a parameter of a borehole using logging sensor measurements acquired as a function of sensor azimuth, the method comprising;
(a) rotating a downhole tool at a first longitudinal position in the borehole, the tool including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist forming the image;
(b) causing the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair, each data pair comprising a logging sensor measurement and a corresponding azimuth;
(c) processing the data pairs acquired in (b) with a predetermined probability distribution function (PDF) to calculate sensor data that is probabilistically distributed in azimuth; and (d) repositioning the downhole tool and rotating it at a second longitudinal position in the borehole and repeating (b) and (c); and (e) assigning a first depth value to said probabilistically distributed sensor data determined in (c) and a second depth value to said probabilistically distributed sensor data determined in (d).
17. (canceled) 18. The method of claim 16, wherein the logging sensor is selected from the group consisting of natural gamma ray sensor, a neutron sensor, a density sensor, a resistivity sensor, a micro-resistivity sensor, a formation pressure sensor, an annular pressure sensor, an ultrasonic sensor, and an audio-frequency acoustic sensor and a physical caliper.
19. The method claim 16, wherein the parameter of the borehole is selected from the group consisting of formation density, formation resistivity, formation acoustic velocity, gamma ray interaction cross, section, neutron interaction cross section and caliper interaction cross section.
20. The method of claim 16, wherein the sensor data is probabilistically distributed in (c) according to the following equation:
wherein M represents a number of discrete angular positions such that in =
0,1,..., M- 1 and i- 0,1,..., M-1, I MAW, [i] represents a temporary image array, I FINAL I
¦m¦ represents said notation P1'[(m - i) mod M] indicates that the PDF is a circular function of the azimuth.
21. The method of claim 16, wherein the sensor data is probabilistically distributed in (c) according to at least one equation selected from the group consisting of:
wherein I RAW [i, j] represents a one or two dimensional temporary image array, I FINAL [m,n] represents said probabilistically distributed sensor data, M.
represents a number of discrete angular positions such that m = 0,1,...,M - I and i= 0,1,..., M - 1, L represents a number of discrete axial positions in the temporary image array such that j =
0,1,...,L-1, N represents a number of discrete axial positions in said probabilistically distributed sensor data such that n = 0,1,..., N-1,P2'[(m -i)mod M,n - j] represents a discrete two-dimensional PDF, P'Az[(m - i) mod M] represents a discrete one-dimensional azimuthal PDF, P'Ax[n - j] represents a discrete one-dimensional axial PDF, and notation P2' [m - i) mod M, n - j]
and P Az [(m - i) mod M ¦ indicates that the two-dimensional and one-dimensional azimuthal PDF's are circular functions of the azimuth.
22. The method of claim 1, further comprising:
(e) spatially compressing said probabilistically distributed sensor data, the spatial compressing including summing the probabilistically distributed sensor data in each of a plurality of predetermined azimuthal sectors.
23. The method of claim 22, comprising between 4 and 24 azimuthal sectors.
consisting of: (i) storing said spatially compressed sensor data to downhole memory and (ii) telemetering said spatially compressed sensor data to a surface location.
25. The method of claim 1, further comprising (e) processing said probabilistically distributed sensor data acquired in (c) with a de-blurring filter.
26. The method of claim 25, wherein the de-blurring filter is selected from the group consisting of: an inverse filter, a pseudo-inverse filter, a radially limited inverse filter, and a Wiener filter.
27. A system for estimating an azimuthal dependence of a parameter of a borehole using logging sensor measurements acquired as a function of azimuth of said logging sensors, the system comprising:
a downhole tool including at least one logging sensor and at least one azimuth sensor, data from the logging tool being operable to assist determination of a parameter of the borehole, the downhole tool further including a controller disposed to process logging sensor data with a predetermined sensor probability distribution function (PDF), the downhole tool operable to be coupled to a drill string and rotated in a borehole;
the controller configured to:
(A) cause the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair during each of predetermined first and second time periods, each of the data pairs comprising a logging sensor measurement and a corresponding azimuth;
(B) process the data pairs acquired in (A) with a predetermined sensor PDF to calculate sensor data that is probabilistically distributed in azimuth; and (C) assign corresponding first and second borehole depth values to the probabilistically distributed sensor data determined in (B) using data pairs acquired during the first and second time periods.
(R) according to the following equation:
wherein M represents a number of discrete angular positions such that m =
0,1,..., M - 1 and i 0,1,..., M - 1, I Raw [i] represents a temporary image array, I FINAL
[m] represents said probabilistically distributed sensor data, P1'[(m - i) mod M] represents a discrete PDF, and the notation P1'[(m - i) mod M] indicates that the PDF is a circular function of the azimuth.
29. The method of claim 27, wherein the sensor data is probabilistically distributed in (B) according to at least one equation selected from the group consisting of:
wherein I RAW [i,j] represents a one or two dimensional temporary image array, I FINAL [m,n]
represents said probabilistically distributed sensor data, M represents a number of discrete angular positions such that m - 0,1,..., M-1 and i= 0,1,..., M-1 , L
represents a number of discrete axial positions in the temporary image array such that j = 0,1,..., L-1, N represents a number of discrete axial positions in said probabilistically distributed sensor data such that n= 0,1,..., N-1, P2'[m - i) mod M, n- j] represents a discrete two-dimensional PDF, P'Az [(m - i) mod M] represents a discrete one-dimensional azimuthal PDF, P'Ax [n - j] represents a discrete one-dimensional axial PDF, and notation P2'[(m - i)mod M,n - j] and P'Az[(m - i) mod M] indicates that the two-dimensional and one-dimensional azimuthal PDFs are circular functions of the azimuth.
using logging sensor measurements acquired as a function of sensor azimuth, the method comprising:
(a) rotating a downhole tool in a borehole, the tool including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist determination of a parameter of the borehole, (b) causing the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair, each data pair comprising a logging sensor measurement and a corresponding azimuth, the at least one data pair stored in a one-dimensional temporary image array;
(c) multiplying the temporary image array acquired in (b) with a predetermined probability density function (PDF) to calculate sensor data that is probabilistically distributed in azimuth.
31. The method of claim 30, wherein the sensor data is probabilistically distributing in (c) according to the following equation:
wherein M represents a number of-discrete angular positions such that m =
0,1,..., M-1 and i 0,1,...,M - 1 I RAW [i] represents the temporary image array, I FINAL
[m] represents said probabilistically distributed sensor data, P1'[(m - i)mod M1 represents a discrete PDF, and the notation P1'[(m - i) mod M] indicates that the PDF is a circular function of the azimuth.
32. The method of claim 31, wlierein P1'[(m - i) mod M] is selected from the group consisting of:
(i) P'M [(m - i) mod M];
(ii) P'R [(m - i) mod M]; and wherein P'Az[(m - i) mod M] represents the response function of the logging sensor;
P'R[(m-i)mod M] represents the response function of the azimuth sensor, and P'Az[(m - i)mod M].cndot. - P'R [(m - i) mod M] represents the product of the response function of the logging sensor with the response function of the azimuth sensor.
33. A method for estimating an azimuthal dependence of a parameter of a borehole using logging sensor measurements acquired as a function of sensor azimuth, the method comprising:
(a) rotating a downhole tool in a borehole, the toot including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist determination of a parameter of the borehole;
(b) causing the at least one logging sensor and the at least one azimuth sensor to acquire a plurality of data pairs during each of predetermined first and second time periods, each of the data pairs comprising a logging sensor measurement and a corresponding azimuth;
(c) processing the data pairs acquired in (h) with a predetermined probability density function (PDF) to calculate sensor data that is probabilistically distributed in azimuth, wherein the sensor data is probabilistically distributed in first and second, azimuthal and axial dimensions.
34. The method of claim 33, wherein the PDF is selected from the group consisting of: (i) a two-dimensional PDF and (ii) first and second one-dimensional PDFs.
35. The method of claim 33, wherein the sensor data is probabilistically distributed in (c) according to at least one equation selected from the group consisting of:
represents said probabilistically distributed sensor data, M represents a number of discrete angular positions such that -m = 0,1,..., M-1 and i= 0,1,..., M- I, L
represents a number of discrete axial positions in the temporary image array such that j = 0,1,..., I, -1, N represents a number of discrete axial positions in said probabilistically distributed sensor data such that n = 0,1,..., N-1, P2'[(m-i)mod M, n - j] represents a two-dimensional discrete PDF, P'Az [(m - i) mod M] represents a one dimensional azimuthal PDF, P'Ax[n - j]
represents a one-dimensional axial PDF, and notation P2'[(m - i) mod M, n - j] and P'Az[(m - i) mod M] indicates that the two-dimensional and one-dimensional azimuthal PDFs are circular functions of the azimuth.
sensor, an audio-frequency acoustic sensor, and a physical caliper.
group consisting of formation density, formation resistivity, formation acoustic velocity, gamma ray interaction cross section, neutron interaction cross section, and caliper interaction cross section.
7. The method of claim 1, wherein the tool further comprises a controller, the controller disposed to cause the at least one logging sensor and the at least one azimuth sensor to acquire the plurality of data pairs in (b), the controller further disposed to process the data pairs with a predetermined PDF in (c).
8. The method of claim 1, wherein the at least one logging sensor and the at least one azimuth sensor acquire the plurality of data pairs in (b) during rotation of the tool in (a).
9. The method of claim 1, wherein:
the logging sensor measurements acquired in (b) are stored in a one-dimensional temporary image array; and the sensor data is probabilistically distributed in (c) via multiplying the temporary image array with the PDF.
10-12 (canceled).
13. The method of claim 1, wherein the sensor data is probabilistically distributed in first and second, azimuthal and axial dimensions.
14-15 (canceled).
16. A method for forming an image of a parameter of a borehole using logging sensor measurements acquired as a function of sensor azimuth, the method comprising;
(a) rotating a downhole tool at a first longitudinal position in the borehole, the tool including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist forming the image;
(b) causing the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair, each data pair comprising a logging sensor measurement and a corresponding azimuth;
(c) processing the data pairs acquired in (b) with a predetermined probability distribution function (PDF) to calculate sensor data that is probabilistically distributed in azimuth; and (d) repositioning the downhole tool and rotating it at a second longitudinal position in the borehole and repeating (b) and (c); and (e) assigning a first depth value to said probabilistically distributed sensor data determined in (c) and a second depth value to said probabilistically distributed sensor data determined in (d).
17. (canceled) 18. The method of claim 16, wherein the logging sensor is selected from the group consisting of natural gamma ray sensor, a neutron sensor, a density sensor, a resistivity sensor, a micro-resistivity sensor, a formation pressure sensor, an annular pressure sensor, an ultrasonic sensor, and an audio-frequency acoustic sensor and a physical caliper.
19. The method claim 16, wherein the parameter of the borehole is selected from the group consisting of formation density, formation resistivity, formation acoustic velocity, gamma ray interaction cross, section, neutron interaction cross section and caliper interaction cross section.
20. The method of claim 16, wherein the sensor data is probabilistically distributed in (c) according to the following equation:
wherein M represents a number of discrete angular positions such that in =
0,1,..., M- 1 and i- 0,1,..., M-1, I MAW, [i] represents a temporary image array, I FINAL I
¦m¦ represents said notation P1'[(m - i) mod M] indicates that the PDF is a circular function of the azimuth.
21. The method of claim 16, wherein the sensor data is probabilistically distributed in (c) according to at least one equation selected from the group consisting of:
wherein I RAW [i, j] represents a one or two dimensional temporary image array, I FINAL [m,n] represents said probabilistically distributed sensor data, M.
represents a number of discrete angular positions such that m = 0,1,...,M - I and i= 0,1,..., M - 1, L represents a number of discrete axial positions in the temporary image array such that j =
0,1,...,L-1, N represents a number of discrete axial positions in said probabilistically distributed sensor data such that n = 0,1,..., N-1,P2'[(m -i)mod M,n - j] represents a discrete two-dimensional PDF, P'Az[(m - i) mod M] represents a discrete one-dimensional azimuthal PDF, P'Ax[n - j] represents a discrete one-dimensional axial PDF, and notation P2' [m - i) mod M, n - j]
and P Az [(m - i) mod M ¦ indicates that the two-dimensional and one-dimensional azimuthal PDF's are circular functions of the azimuth.
22. The method of claim 1, further comprising:
(e) spatially compressing said probabilistically distributed sensor data, the spatial compressing including summing the probabilistically distributed sensor data in each of a plurality of predetermined azimuthal sectors.
23. The method of claim 22, comprising between 4 and 24 azimuthal sectors.
consisting of: (i) storing said spatially compressed sensor data to downhole memory and (ii) telemetering said spatially compressed sensor data to a surface location.
25. The method of claim 1, further comprising (e) processing said probabilistically distributed sensor data acquired in (c) with a de-blurring filter.
26. The method of claim 25, wherein the de-blurring filter is selected from the group consisting of: an inverse filter, a pseudo-inverse filter, a radially limited inverse filter, and a Wiener filter.
27. A system for estimating an azimuthal dependence of a parameter of a borehole using logging sensor measurements acquired as a function of azimuth of said logging sensors, the system comprising:
a downhole tool including at least one logging sensor and at least one azimuth sensor, data from the logging tool being operable to assist determination of a parameter of the borehole, the downhole tool further including a controller disposed to process logging sensor data with a predetermined sensor probability distribution function (PDF), the downhole tool operable to be coupled to a drill string and rotated in a borehole;
the controller configured to:
(A) cause the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair during each of predetermined first and second time periods, each of the data pairs comprising a logging sensor measurement and a corresponding azimuth;
(B) process the data pairs acquired in (A) with a predetermined sensor PDF to calculate sensor data that is probabilistically distributed in azimuth; and (C) assign corresponding first and second borehole depth values to the probabilistically distributed sensor data determined in (B) using data pairs acquired during the first and second time periods.
(R) according to the following equation:
wherein M represents a number of discrete angular positions such that m =
0,1,..., M - 1 and i 0,1,..., M - 1, I Raw [i] represents a temporary image array, I FINAL
[m] represents said probabilistically distributed sensor data, P1'[(m - i) mod M] represents a discrete PDF, and the notation P1'[(m - i) mod M] indicates that the PDF is a circular function of the azimuth.
29. The method of claim 27, wherein the sensor data is probabilistically distributed in (B) according to at least one equation selected from the group consisting of:
wherein I RAW [i,j] represents a one or two dimensional temporary image array, I FINAL [m,n]
represents said probabilistically distributed sensor data, M represents a number of discrete angular positions such that m - 0,1,..., M-1 and i= 0,1,..., M-1 , L
represents a number of discrete axial positions in the temporary image array such that j = 0,1,..., L-1, N represents a number of discrete axial positions in said probabilistically distributed sensor data such that n= 0,1,..., N-1, P2'[m - i) mod M, n- j] represents a discrete two-dimensional PDF, P'Az [(m - i) mod M] represents a discrete one-dimensional azimuthal PDF, P'Ax [n - j] represents a discrete one-dimensional axial PDF, and notation P2'[(m - i)mod M,n - j] and P'Az[(m - i) mod M] indicates that the two-dimensional and one-dimensional azimuthal PDFs are circular functions of the azimuth.
using logging sensor measurements acquired as a function of sensor azimuth, the method comprising:
(a) rotating a downhole tool in a borehole, the tool including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist determination of a parameter of the borehole, (b) causing the at least one logging sensor and the at least one azimuth sensor to acquire at least one data pair, each data pair comprising a logging sensor measurement and a corresponding azimuth, the at least one data pair stored in a one-dimensional temporary image array;
(c) multiplying the temporary image array acquired in (b) with a predetermined probability density function (PDF) to calculate sensor data that is probabilistically distributed in azimuth.
31. The method of claim 30, wherein the sensor data is probabilistically distributing in (c) according to the following equation:
wherein M represents a number of-discrete angular positions such that m =
0,1,..., M-1 and i 0,1,...,M - 1 I RAW [i] represents the temporary image array, I FINAL
[m] represents said probabilistically distributed sensor data, P1'[(m - i)mod M1 represents a discrete PDF, and the notation P1'[(m - i) mod M] indicates that the PDF is a circular function of the azimuth.
32. The method of claim 31, wlierein P1'[(m - i) mod M] is selected from the group consisting of:
(i) P'M [(m - i) mod M];
(ii) P'R [(m - i) mod M]; and wherein P'Az[(m - i) mod M] represents the response function of the logging sensor;
P'R[(m-i)mod M] represents the response function of the azimuth sensor, and P'Az[(m - i)mod M].cndot. - P'R [(m - i) mod M] represents the product of the response function of the logging sensor with the response function of the azimuth sensor.
33. A method for estimating an azimuthal dependence of a parameter of a borehole using logging sensor measurements acquired as a function of sensor azimuth, the method comprising:
(a) rotating a downhole tool in a borehole, the toot including at least one logging sensor and at least one azimuth sensor, data from the logging sensor being operable to assist determination of a parameter of the borehole;
(b) causing the at least one logging sensor and the at least one azimuth sensor to acquire a plurality of data pairs during each of predetermined first and second time periods, each of the data pairs comprising a logging sensor measurement and a corresponding azimuth;
(c) processing the data pairs acquired in (h) with a predetermined probability density function (PDF) to calculate sensor data that is probabilistically distributed in azimuth, wherein the sensor data is probabilistically distributed in first and second, azimuthal and axial dimensions.
34. The method of claim 33, wherein the PDF is selected from the group consisting of: (i) a two-dimensional PDF and (ii) first and second one-dimensional PDFs.
35. The method of claim 33, wherein the sensor data is probabilistically distributed in (c) according to at least one equation selected from the group consisting of:
represents said probabilistically distributed sensor data, M represents a number of discrete angular positions such that -m = 0,1,..., M-1 and i= 0,1,..., M- I, L
represents a number of discrete axial positions in the temporary image array such that j = 0,1,..., I, -1, N represents a number of discrete axial positions in said probabilistically distributed sensor data such that n = 0,1,..., N-1, P2'[(m-i)mod M, n - j] represents a two-dimensional discrete PDF, P'Az [(m - i) mod M] represents a one dimensional azimuthal PDF, P'Ax[n - j]
represents a one-dimensional axial PDF, and notation P2'[(m - i) mod M, n - j] and P'Az[(m - i) mod M] indicates that the two-dimensional and one-dimensional azimuthal PDFs are circular functions of the azimuth.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/881,043 | 2007-07-25 | ||
| US11/881,043 US7558675B2 (en) | 2007-07-25 | 2007-07-25 | Probablistic imaging with azimuthally sensitive MWD/LWD sensors |
| PCT/US2008/008958 WO2009014720A1 (en) | 2007-07-25 | 2008-07-24 | Probablistic imaging with azimuthally sensitive mwd/lwd sensors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2704917A1 true CA2704917A1 (en) | 2009-01-29 |
| CA2704917C CA2704917C (en) | 2011-05-31 |
Family
ID=40281672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2704917A Expired - Fee Related CA2704917C (en) | 2007-07-25 | 2008-07-24 | Probablistic imaging with azimuthally sensitive mwd/lwd sensors |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7558675B2 (en) |
| EP (1) | EP2179302B1 (en) |
| CA (1) | CA2704917C (en) |
| WO (1) | WO2009014720A1 (en) |
Families Citing this family (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8015868B2 (en) * | 2007-09-27 | 2011-09-13 | Baker Hughes Incorporated | Formation evaluation using estimated borehole tool position |
| JP5046017B2 (en) * | 2007-10-04 | 2012-10-10 | ソニー株式会社 | Image processing apparatus and method, and program |
| EP2238477A4 (en) * | 2007-12-19 | 2016-08-24 | Exxonmobil Upstream Res Co | Gamma ray tool response modeling |
| US7937223B2 (en) * | 2007-12-28 | 2011-05-03 | Schlumberger Technology Corporation | Downhole fluid analysis |
| CN101983342A (en) * | 2008-03-31 | 2011-03-02 | 南方创新国际股份有限公司 | Method and apparatus for borehole logging |
| US7899622B2 (en) * | 2008-06-13 | 2011-03-01 | Baker Hughes Incorporated | Sequential resistivity imaging with asymmetric electrode arrays |
| US8245794B2 (en) * | 2008-08-14 | 2012-08-21 | Baker Hughes Incorporated | Apparatus and method for generating sector residence time images of downhole tools |
| US8195400B2 (en) * | 2009-05-08 | 2012-06-05 | Smith International, Inc. | Directional resistivity imaging using harmonic representations |
| US8655104B2 (en) | 2009-06-18 | 2014-02-18 | Schlumberger Technology Corporation | Cyclic noise removal in borehole imaging |
| US8682102B2 (en) | 2009-06-18 | 2014-03-25 | Schlumberger Technology Corporation | Cyclic noise removal in borehole imaging |
| US9599737B2 (en) | 2009-06-24 | 2017-03-21 | Halliburton Energy Services, Inc. | Systems and methods for enhancing images of log data |
| US8570045B2 (en) * | 2009-09-10 | 2013-10-29 | Schlumberger Technology Corporation | Drilling system for making LWD measurements ahead of the bit |
| US8581594B2 (en) | 2009-12-30 | 2013-11-12 | Schlumberger Technology Corporation | Microresistivity anisotropy logging tool employing a monopole current injection electrode |
| US8508231B2 (en) * | 2009-12-30 | 2013-08-13 | Schlumberger Technology Corporation | Logging tool employing a monopole current injection electrode for microresistivity imaging |
| US8271199B2 (en) * | 2009-12-31 | 2012-09-18 | Smith International, Inc. | Binning method for borehole imaging |
| CA2787149A1 (en) * | 2010-01-22 | 2011-07-28 | Schlumberger Canada Limited | Real-time formation anisotropy and dip evaluation using tri-axial induction measurements |
| US8600115B2 (en) | 2010-06-10 | 2013-12-03 | Schlumberger Technology Corporation | Borehole image reconstruction using inversion and tool spatial sensitivity functions |
| US8625390B2 (en) * | 2010-08-18 | 2014-01-07 | Schlumberger Technology Corporation | Acoustic waveform stacking using azimuthal and/or standoff binning |
| WO2012027630A2 (en) | 2010-08-26 | 2012-03-01 | Smith International, Inc. | Apparatus and method for microresistivity imaging in nonconductive drilling fluid |
| US8886483B2 (en) * | 2010-09-08 | 2014-11-11 | Baker Hughes Incorporated | Image enhancement for resistivity features in oil-based mud image |
| US9658360B2 (en) | 2010-12-03 | 2017-05-23 | Schlumberger Technology Corporation | High resolution LWD imaging |
| US9041547B2 (en) | 2011-08-26 | 2015-05-26 | Baker Hughes Incorporated | System and method for stick-slip correction |
| US9273547B2 (en) | 2011-12-12 | 2016-03-01 | Schlumberger Technology Corporation | Dynamic borehole azimuth measurements |
| US9982525B2 (en) | 2011-12-12 | 2018-05-29 | Schlumberger Technology Corporation | Utilization of dynamic downhole surveying measurements |
| US10977396B2 (en) * | 2012-01-13 | 2021-04-13 | Schlumberger Technology Corporation | Determining an elastic model for a geologic region |
| CA2882903A1 (en) * | 2012-11-21 | 2014-05-30 | Halliburton Energy Services, Inc. | Reducing conductive casing effect in transient cased-hole resistivity logging |
| US9760540B2 (en) * | 2012-11-21 | 2017-09-12 | National Central University | Methods for processing sequential data to identify possible peak points and to estimate peak to noise ratio of sequential data |
| US9719342B2 (en) * | 2013-09-26 | 2017-08-01 | Schlumberger Technology Corporation | Drill bit assembly imaging systems and methods |
| CA2927140C (en) * | 2013-11-14 | 2019-08-20 | Halliburton Energy Services, Inc. | Downhole systems for communicating data |
| WO2015099765A1 (en) * | 2013-12-27 | 2015-07-02 | Halliburton Energy Services, Inc. | Multi-frequency dielectric borehole imager |
| US20170139071A1 (en) * | 2014-05-27 | 2017-05-18 | Halliburton Energy Services, Inc. | Acoustic deblurring for downwell sensors |
| US10711590B2 (en) * | 2014-12-31 | 2020-07-14 | Halliburton Energy Services, Inc. | Visualization of look-ahead sensor data for wellbore drilling tools |
| GB2533954B (en) | 2015-01-08 | 2017-10-25 | Reeves Wireline Tech Ltd | Communication methods and apparatuses for downhole logging tools |
| GB2543496B (en) * | 2015-10-16 | 2017-11-29 | Reeves Wireline Tech Ltd | A borehole logging sensor and related methods |
| WO2017172563A1 (en) | 2016-03-31 | 2017-10-05 | Schlumberger Technology Corporation | Equipment string communication and steering |
| WO2017184117A1 (en) | 2016-04-19 | 2017-10-26 | Halliburton Energy Services, Inc. | Borehole imaging sensor assembly |
| US11016219B2 (en) | 2017-03-01 | 2021-05-25 | Halliburton Energy Services, Inc. | Delta encoding of downhole images of petrophysical rock properties |
| US20180283156A1 (en) * | 2017-04-03 | 2018-10-04 | Nabors Drilling Technologies Usa, Inc. | Binning During Non-Rotation Drilling in a Wellbore |
| US10739318B2 (en) * | 2017-04-19 | 2020-08-11 | Baker Hughes, A Ge Company, Llc | Detection system including sensors and method of operating such |
| US11231517B2 (en) | 2018-02-27 | 2022-01-25 | Sanvean Technologies Llc | Azimuthal measurement for geosteering |
| US10782442B2 (en) * | 2018-04-30 | 2020-09-22 | Precision Drilling Corporation | Gamma ray counter |
| US11598895B2 (en) | 2018-05-25 | 2023-03-07 | Halliburton Energy Services, Inc. | Ultrasonic waveform processing using deconvolution in downhole environments |
| US11531137B2 (en) * | 2019-02-11 | 2022-12-20 | Schlumberger Technology Corporation | System and method for characterizing reservoir wettability from an imaging technique combined with multiphysics logs and data analytics |
| US11610288B2 (en) | 2019-11-11 | 2023-03-21 | Halliburton Energy Services, Inc. | Sharpening data representations of subterranean formations |
| US20210263186A1 (en) * | 2020-02-24 | 2021-08-26 | International Business Machines Corporation | Location-based forecasting of weather events based on user impact |
Family Cites Families (103)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3408561A (en) | 1963-07-29 | 1968-10-29 | Arps Corp | Formation resistivity measurement while drilling, utilizing physical conditions representative of the signals from a toroidal coil located adjacent the drilling bit |
| US3305771A (en) | 1963-08-30 | 1967-02-21 | Arps Corp | Inductive resistivity guard logging apparatus including toroidal coils mounted on a conductive stem |
| US3377549A (en) | 1964-12-23 | 1968-04-09 | Arps Corp | Coil assembly structure and mounting forming an annular chamber to be mounted and sealed on a drill collar |
| US3488574A (en) | 1966-11-01 | 1970-01-06 | Schlumberger Technology Corp | Borehole investigating methods and apparatus including the detection of a cased borehole from another nearby borehole |
| US3742443A (en) * | 1970-07-27 | 1973-06-26 | Mobil Oil Corp | Apparatus for improving signal-to-noise ratio in logging-while-drilling system |
| US4720681A (en) | 1981-06-08 | 1988-01-19 | Schlumberger Technology Corporation | Digital induction logging tool |
| US4468623A (en) | 1981-07-30 | 1984-08-28 | Schlumberger Technology Corporation | Method and apparatus using pad carrying electrodes for electrically investigating a borehole |
| US4562556A (en) | 1981-10-09 | 1985-12-31 | Schlumberger Technology Corporation | Compressional and shear velocity logging method apparatus |
| US4642648A (en) | 1982-02-22 | 1987-02-10 | Litchstreet Co. | Simple passive/active proximity warning system |
| US4542648A (en) | 1983-12-29 | 1985-09-24 | Shell Oil Company | Method of correlating a core sample with its original position in a borehole |
| US4845433A (en) | 1984-05-31 | 1989-07-04 | Schlumberger Technology Corporation | Apparatus for microinductive investigation of earth formations |
| US4652829A (en) | 1984-12-28 | 1987-03-24 | Schlumberger Technology Corp. | Electromagnetic logging apparatus with button antennas for measuring the dielectric constant of formation surrounding a borehole |
| US4873488A (en) | 1985-04-03 | 1989-10-10 | Schlumberger Technology Corporation | Induction logging sonde with metallic support having a coaxial insulating sleeve member |
| FR2600171B1 (en) | 1986-06-17 | 1990-10-19 | Geoservices | LARGE DEPTH TRANSMITTER ANTENNA |
| US4786874A (en) | 1986-08-20 | 1988-11-22 | Teleco Oilfield Services Inc. | Resistivity sensor for generating asymmetrical current field and method of using the same |
| US4940943A (en) | 1988-04-19 | 1990-07-10 | Baroid Technology, Inc. | Method and apparatus for optimizing the reception pattern of the antenna of a propagating electromagnetic wave logging tool |
| US5233522A (en) | 1989-07-21 | 1993-08-03 | Halliburton Logging Services, Inc. | Multifrequency dielectric logging tool including antenna system responsive to invaded rock formations |
| US5023450A (en) | 1990-04-12 | 1991-06-11 | Halliburton Logging Services, Inc. | Method for discriminating microphonic noise in proportional counters |
| US5045795A (en) | 1990-07-10 | 1991-09-03 | Halliburton Logging Services Inc. | Azimuthally oriented coil array for MWD resistivity logging |
| US5260662A (en) | 1990-09-10 | 1993-11-09 | Baker Hughes Incorporated | Conductivity method and apparatus for measuring strata resistivity adjacent a borehole |
| US5506769A (en) | 1990-10-05 | 1996-04-09 | Halliburton Logging Services, Inc. | Method for enhancing vertical resolution of nuclear well logging instruments |
| US5184079A (en) | 1990-11-13 | 1993-02-02 | Schlumberger Technology Corporation | Method and apparatus for correcting data developed from a well tool disposed at a dip angle in a wellbore to eliminate the effects of the dip angle on the data |
| EP0519675A1 (en) | 1991-06-18 | 1992-12-23 | Halliburton Company | Method and apparatus for correcting measurement-while-drilling porosity |
| EP0539272B1 (en) | 1991-10-21 | 1997-03-05 | Schlumberger Limited | Method and apparatus for detecting and quantifying hydrocarbon bearing laminated reservoirs on a workstation |
| US5339037A (en) | 1992-10-09 | 1994-08-16 | Schlumberger Technology Corporation | Apparatus and method for determining the resistivity of earth formations |
| US5200705A (en) | 1991-10-31 | 1993-04-06 | Schlumberger Technology Corporation | Dipmeter apparatus and method using transducer array having longitudinally spaced transducers |
| US5235285A (en) | 1991-10-31 | 1993-08-10 | Schlumberger Technology Corporation | Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations |
| NO306522B1 (en) | 1992-01-21 | 1999-11-15 | Anadrill Int Sa | Procedure for acoustic transmission of measurement signals when measuring during drilling |
| US5491488A (en) | 1992-06-11 | 1996-02-13 | Baker Hughes Incorporated | Electromagnetic propagation tool using magnetic dipole antennas |
| US5331331A (en) | 1992-06-11 | 1994-07-19 | Baker Hughes Incorporated | Electromagnetic propagation tool using dipole antennas |
| US5672867A (en) | 1992-09-01 | 1997-09-30 | Halliburton Logging Services, Inc. | Method for filtering gamma ray well logging tool response to enhance vertical detail while suppressing statistical noise |
| US5463320A (en) | 1992-10-09 | 1995-10-31 | Schlumberger Technology Corporation | Apparatus and method for determining the resitivity of underground formations surrounding a borehole |
| US5291137A (en) | 1992-11-02 | 1994-03-01 | Schlumberger Technology Corporation | Processing method and apparatus for processing spin echo in-phase and quadrature amplitudes from a pulsed nuclear magnetism tool and producing new output data to be recorded on an output record |
| US5519318A (en) | 1992-12-28 | 1996-05-21 | The United States Of America As Represented By The Secretary Of The Navy | Triaxial magnetic heading sensing apparatus having magnetaresistors and nulling coils |
| FR2703727B1 (en) * | 1993-04-09 | 1995-06-30 | Schlumberger Services Petrol | Method and device for determining a depth correction for a logging tool in an oil well. |
| US5463319A (en) | 1993-07-28 | 1995-10-31 | Halliburton Energy Services, Inc. | Induction log sonde feedpipe having a plurality of tubes arranged within it and windows to facilitate the passage of the conductors |
| US5453693A (en) | 1993-10-01 | 1995-09-26 | Halliburton Company | Logging system for measuring dielectric properties of fluids in a cased well using multiple mini-wave guides |
| US5422480A (en) | 1994-01-03 | 1995-06-06 | Halliburton Company | Method and apparatus for the verification of helium-3 proportional counters |
| US5473158A (en) | 1994-01-14 | 1995-12-05 | Schlumberger Technology Corporation | Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole |
| US5530358A (en) | 1994-01-25 | 1996-06-25 | Baker Hughes, Incorporated | Method and apparatus for measurement-while-drilling utilizing improved antennas |
| US5486695A (en) | 1994-03-29 | 1996-01-23 | Halliburton Company | Standoff compensation for nuclear logging while drilling systems |
| GB2288028A (en) | 1994-03-31 | 1995-10-04 | Halliburton Co | Sealed modular downhole antenna |
| GB9409550D0 (en) | 1994-05-12 | 1994-06-29 | Halliburton Co | Location determination using vector measurements |
| US5519668A (en) | 1994-05-26 | 1996-05-21 | Schlumberger Technology Corporation | Methods and devices for real-time formation imaging through measurement while drilling telemetry |
| US5563512A (en) | 1994-06-14 | 1996-10-08 | Halliburton Company | Well logging apparatus having a removable sleeve for sealing and protecting multiple antenna arrays |
| US5591967A (en) | 1994-10-11 | 1997-01-07 | Halliburton Company | Method and apparatus for determining neutron detector operability using gamma ray sources |
| WO1996018118A1 (en) | 1994-12-08 | 1996-06-13 | Noranda Inc. | Method for real time location of deep boreholes while drilling |
| US6023168A (en) | 1995-08-21 | 2000-02-08 | Schlumberger Technology Corporation | Apparatus and method for measuring the resistivity of underground formations |
| US5899958A (en) | 1995-09-11 | 1999-05-04 | Halliburton Energy Services, Inc. | Logging while drilling borehole imaging and dipmeter device |
| US5850624A (en) | 1995-10-18 | 1998-12-15 | The Charles Machine Works, Inc. | Electronic compass |
| US5867806A (en) | 1996-03-13 | 1999-02-02 | Halliburton Energy Services, Inc. | System and method for performing inversion on LWD resistivity logs with enhanced resolution |
| GB9607297D0 (en) | 1996-04-09 | 1996-06-12 | Anadrill Int Sa | Noise detection and suppression system for wellbore telemetry |
| US6166539A (en) | 1996-10-30 | 2000-12-26 | Regents Of The University Of Minnesota | Magnetoresistance sensor having minimal hysteresis problems |
| US5966013A (en) | 1996-06-12 | 1999-10-12 | Halliburton Energy Services, Inc. | Determination of horizontal resistivity of formations utilizing induction-type logging measurements in deviated borehole |
| US6531868B2 (en) | 1996-12-30 | 2003-03-11 | Halliburton Energy Services, Inc. | System and methods for formation evaluation while drilling |
| US5892460A (en) | 1997-03-06 | 1999-04-06 | Halliburton Energy Services, Inc. | Logging while drilling tool with azimuthal sensistivity |
| US6145968A (en) | 1997-03-07 | 2000-11-14 | Encad, Inc. | System and method for supplying ink to a printer |
| GB9717975D0 (en) | 1997-08-22 | 1997-10-29 | Halliburton Energy Serv Inc | A method of surveying a bore hole |
| US6037776A (en) | 1997-09-10 | 2000-03-14 | Mcglone; T. David | Method and apparatus for geophysical exploration using GMR sensors |
| US5953683A (en) | 1997-10-09 | 1999-09-14 | Ascension Technology Corporation | Sourceless orientation sensor |
| US6064210A (en) | 1997-11-14 | 2000-05-16 | Cedar Bluff Group Corporation | Retrievable resistivity logging system for use in measurement while drilling |
| US6173793B1 (en) | 1998-12-18 | 2001-01-16 | Baker Hughes Incorporated | Measurement-while-drilling devices with pad mounted sensors |
| US6100696A (en) | 1998-01-09 | 2000-08-08 | Sinclair; Paul L. | Method and apparatus for directional measurement of subsurface electrical properties |
| US6247542B1 (en) * | 1998-03-06 | 2001-06-19 | Baker Hughes Incorporated | Non-rotating sensor assembly for measurement-while-drilling applications |
| US6326784B1 (en) | 1998-11-05 | 2001-12-04 | Schlumberger Technology Corporation | Nuclear magnetic resonance logging with azimuthal resolution using gradient coils |
| US6131694A (en) | 1998-09-02 | 2000-10-17 | Ahlliburton Energy Services, Inc. | Vertical seismic profiling in a drilling tool |
| FR2788135B1 (en) | 1998-12-30 | 2001-03-23 | Schlumberger Services Petrol | METHOD FOR OBTAINING A DEVELOPED TWO-DIMENSIONAL IMAGE OF THE WALL OF A WELL |
| US6215120B1 (en) | 1999-03-25 | 2001-04-10 | Halliburton Energy Services, Inc. | Method for determining symmetry and direction properties of azimuthal gamma ray distributions |
| GB9909040D0 (en) | 1999-04-20 | 1999-06-16 | Flight Refueling Ltd | Systems and methods for locating subsurface objects |
| US6307199B1 (en) | 1999-05-12 | 2001-10-23 | Schlumberger Technology Corporation | Compensation of errors in logging-while-drilling density measurements |
| US6517892B1 (en) * | 1999-05-24 | 2003-02-11 | Showa Denko K.K. | Solid electrolytic capacitor and method for producing the same |
| US6167348A (en) | 1999-05-27 | 2000-12-26 | Schlumberger Technology Corporation | Method and apparatus for ascertaining a characteristic of a geological formation |
| US6510105B1 (en) | 1999-10-14 | 2003-01-21 | Shell Oil Company | Obtaining an image of an underground formation |
| US6715550B2 (en) | 2000-01-24 | 2004-04-06 | Shell Oil Company | Controllable gas-lift well and valve |
| US6758277B2 (en) | 2000-01-24 | 2004-07-06 | Shell Oil Company | System and method for fluid flow optimization |
| US7114561B2 (en) * | 2000-01-24 | 2006-10-03 | Shell Oil Company | Wireless communication using well casing |
| US20020036085A1 (en) * | 2000-01-24 | 2002-03-28 | Bass Ronald Marshall | Toroidal choke inductor for wireless communication and control |
| DE60119899T2 (en) * | 2000-03-02 | 2006-11-30 | Shell Internationale Research Maatschappij B.V. | POWER GENERATION USING RE-SETTABLE DISCHARGE BATTERIES |
| US7170424B2 (en) * | 2000-03-02 | 2007-01-30 | Shell Oil Company | Oil well casting electrical power pick-off points |
| JP3857499B2 (en) | 2000-05-12 | 2006-12-13 | セイコーインスツル株式会社 | Electronic compass correction mechanism, electronic compass equipped with the same, and electronic timepiece with electronic compass |
| US6509738B1 (en) | 2000-07-14 | 2003-01-21 | Schlumberger Technology Corporation | Electromagnetic induction well logging instrument having azimuthally sensitive response |
| US6564883B2 (en) | 2000-11-30 | 2003-05-20 | Baker Hughes Incorporated | Rib-mounted logging-while-drilling (LWD) sensors |
| US6693430B2 (en) | 2000-12-15 | 2004-02-17 | Schlumberger Technology Corporation | Passive, active and semi-active cancellation of borehole effects for well logging |
| US6573722B2 (en) * | 2000-12-15 | 2003-06-03 | Schlumberger Technology Corporation | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole |
| WO2002063341A1 (en) | 2001-02-02 | 2002-08-15 | Dbi Corporation | Downhole telemetry and control system |
| US6714014B2 (en) | 2001-04-18 | 2004-03-30 | Baker Hughes Incorporated | Apparatus and method for wellbore resistivity imaging using capacitive coupling |
| JP4006674B2 (en) | 2001-05-22 | 2007-11-14 | 日立金属株式会社 | Compass |
| US6651496B2 (en) | 2001-09-04 | 2003-11-25 | Scientific Drilling International | Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment |
| US6619395B2 (en) | 2001-10-02 | 2003-09-16 | Halliburton Energy Services, Inc. | Methods for determining characteristics of earth formations |
| US6584837B2 (en) | 2001-12-04 | 2003-07-01 | Baker Hughes Incorporated | Method and apparatus for determining oriented density measurements including stand-off corrections |
| US6696684B2 (en) | 2001-12-28 | 2004-02-24 | Schlumberger Technology Corporation | Formation evaluation through azimuthal tool-path identification |
| US6774628B2 (en) | 2002-01-18 | 2004-08-10 | Schlumberger Technology Corporation | Nuclear magnetic resonance imaging using phase encoding with non-linear gradient fields |
| US6833706B2 (en) | 2002-04-01 | 2004-12-21 | Schlumberger Technology Corporation | Hole displacement measuring system and method using a magnetic field |
| US6891777B2 (en) | 2002-06-19 | 2005-05-10 | Schlumberger Technology Corporation | Subsurface borehole evaluation and downhole tool position determination methods |
| US7000700B2 (en) * | 2002-07-30 | 2006-02-21 | Baker Hughes Incorporated | Measurement-while-drilling assembly using real-time toolface oriented measurements |
| US6819111B2 (en) * | 2002-11-22 | 2004-11-16 | Baker Hughes Incorporated | Method of determining vertical and horizontal resistivity, and relative dip in anisotropic earth formations having an arbitrary electro-magnetic antenna combination and orientation with additional rotation and position measurements |
| US6944548B2 (en) | 2002-12-30 | 2005-09-13 | Schlumberger Technology Corporation | Formation evaluation through azimuthal measurements |
| US6843318B2 (en) | 2003-04-10 | 2005-01-18 | Halliburton Energy Services, Inc. | Method and system for determining the position and orientation of a device in a well casing |
| US7382135B2 (en) * | 2003-05-22 | 2008-06-03 | Schlumberger Technology Corporation | Directional electromagnetic wave resistivity apparatus and method |
| CA2499043C (en) * | 2004-03-01 | 2010-09-14 | Pathfinder Energy Services, Inc. | Azimuthally focused electromagnetic measurement tool |
| US7027926B2 (en) * | 2004-04-19 | 2006-04-11 | Pathfinder Energy Services, Inc. | Enhanced measurement of azimuthal dependence of subterranean parameters |
| US7283910B2 (en) * | 2004-07-15 | 2007-10-16 | Baker Hughes Incorporated | Incremental depth measurement for real-time calculation of dip and azimuth |
| US7103982B2 (en) * | 2004-11-09 | 2006-09-12 | Pathfinder Energy Services, Inc. | Determination of borehole azimuth and the azimuthal dependence of borehole parameters |
-
2007
- 2007-07-25 US US11/881,043 patent/US7558675B2/en not_active Expired - Fee Related
-
2008
- 2008-07-24 EP EP08794691A patent/EP2179302B1/en not_active Not-in-force
- 2008-07-24 WO PCT/US2008/008958 patent/WO2009014720A1/en active Application Filing
- 2008-07-24 CA CA2704917A patent/CA2704917C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2704917C (en) | 2011-05-31 |
| WO2009014720A1 (en) | 2009-01-29 |
| EP2179302A4 (en) | 2011-03-30 |
| US20090030616A1 (en) | 2009-01-29 |
| EP2179302B1 (en) | 2012-06-20 |
| US7558675B2 (en) | 2009-07-07 |
| EP2179302A1 (en) | 2010-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2704917A1 (en) | Probablistic imaging with azimuthally sensitive mwd/lwd sensors | |
| EP2519842A2 (en) | Improved binning method for borehole imaging | |
| AU2010358076B2 (en) | High resolution downhole imaging | |
| CA2525353A1 (en) | Determination of borehole azimuth and the azimuthal dependence of borehole parameters | |
| CN1529823A (en) | Method and apparatus for determining orientation of seismic receiver during seismic survey | |
| US8682102B2 (en) | Cyclic noise removal in borehole imaging | |
| CN1516814A (en) | Method of processing data | |
| CN1914519A (en) | Marine seismic acquisition system | |
| US9658360B2 (en) | High resolution LWD imaging | |
| AU2008230025A1 (en) | Array grouping of seismic sensors in a marine streamer for optimum noise attention | |
| CN112068206B (en) | Adjacent well detection method based on interaction theory of well hole and elastic wave | |
| Chen et al. | Joint inversion of receiver functions and surface waves with enhanced preconditioning on densely distributed CNDSN stations: Crustal and upper mantle structure beneath China | |
| US8600115B2 (en) | Borehole image reconstruction using inversion and tool spatial sensitivity functions | |
| WO2016014466A1 (en) | Quality check of compressed data sampling interpolation for seismic information | |
| EP2593817A2 (en) | Acoustic waveform stacking using azimuthal and/or standoff binning | |
| AU2014290779B2 (en) | System and method for estimating porosity distribution in subterranean reservoirs | |
| US8655104B2 (en) | Cyclic noise removal in borehole imaging | |
| CN112904348B (en) | Three-dimensional detection method, device, equipment and storage medium | |
| Dong et al. | Estimation of seabed shear-wave velocity profiles using shear-wave source data | |
| US10072497B2 (en) | Downhole acoustic wave sensing with optical fiber | |
| CN112817039B (en) | Three-dimensional detection method, device, equipment and storage medium | |
| EP3399347A1 (en) | Calibration of combined acceleration and pressure sensors | |
| WO2018154037A1 (en) | Alternating current coupled accelerometer calibration | |
| Geiko | Taylor's Approximation of Wave and Eikonal Equations in Inverse Seismic Problems | |
| Yan | Seismic imaging and migration velocity analysis of Alberta Foothills structural data sets. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20200831 |