CN102221707B - Seismic attribute extracting method for geologic structure containing over-thrust fault - Google Patents
Seismic attribute extracting method for geologic structure containing over-thrust fault Download PDFInfo
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Abstract
The invention discloses a seismic attribute extracting method for a geologic structure containing an over-thrust fault. The method comprises the following steps of: (a) performing geologic horizon interpretation and fault interpretation by using an over-thrust fault-containing seismic interpretation method; (b) connecting a corresponding geologic horizon and a corresponding fault to form a new horizon; (c) performing upper and lower layer connection on the new horizon along the position of the fault to form a closed fault block or horizon connection; and (d) calculating the seismic attribute according to the formed fault block and horizon. Because the upper and lower walls of the horizon can be simultaneously calculated by the method, at least 1/2 of workload can be saved; and because the data of the lower wall of the horizon is reliable and can be used for predicting a reservoir stratum, the predictable area is enlarged. The boundary of the reservoir stratum controlled by the fault is obvious. The method can solve the problem of over-thrust fault-containing seismic attribute extraction, and has direct effect on reservoir stratum prediction, oil gas detection and the like in corresponding oil gas exploratory development.
Description
Technical field
The present invention relates to the seismic attribute extracting method in a kind of oil-gas exploration and development field, relate in particular to the architectonic seismic attribute extracting method that contains overthrust fault in a kind of oil-gas exploration and development field.
Background technology
Seismic attribute is important reservoir prediction technique in the seismic prospecting, has very important effect for the identification of reservoir space distributed areas.
Seismic properties is new volume data or the layer bit data that original earthquake data is obtained through the combination of certain mathematic(al) manipulation or mathematic(al) manipulation, new data in the vertical or feature transversely distribute, the regularity of distribution or reservoir that these aspect ratio original earthquake datas more can embody reservoir intuitively contain the fluid rule, carry out reservoir prediction or contain fluid identification according to these regularities of distribution.
Seismic properties generally can be divided into four large classes, and the first is the body attribute, namely a certain seismic data volume is carried out certain mathematic(al) manipulation or some mathematic(al) manipulation combination after, obtain the attribute volume with the raw data formed objects, this data volume is the body attribute data; The second is along layer attribute, comprise that along the geologic horizon of a certain seismic interpretation geological data being carried out certain mathematic(al) manipulation or some mathematic(al) manipulation combination and geologic horizon along this seismic interpretation identical time of floating up or down carries out mathematic(al) manipulation, form a new layer bit data, the value of this layer bit data is along layer attribute; The third is along layer body attribute, namely between the geologic horizon of two seismic interpretations or in certain solid timing window, geological data is carried out certain mathematic(al) manipulation or some mathematic(al) manipulation combination, obtain a new layer bit data, the value of this layer bit data is along layer body attribute; The 4th kind is interlayer body attribute, between the geologic horizon of two seismic interpretations or in certain solid timing window, data volume with certain thickness (time thickness or space thickness) is carried out certain mathematic(al) manipulation or some mathematic(al) manipulation combination, obtain a new interlayer volume data, the value of this interlayer volume data is interlayer body attribute.
Except carrying out the attributes extraction along solid timing window or set time value, the tomography that all can relate to seismic interpretation along the attributes extraction method of layer and interlayer, traditional attributes extraction method is calculated under trap-down or unfaulted model, when the stratum contains overthrust fault, upper lower burrs is calculated respectively, thereby needs twice computation process, or casts out overthrust fault information, namely cast out the lower wall information of overthrust fault, extract thereby can't finish the attribute data that contains overthrust fault.Yet, development along with Seismic exploration and development, be transitioned into now the complex structure exploration stage, the tectonic structure that contains overthrust fault has become geological phenomenon very general in the exploratory development, the needs that conventional attributes extraction and analytical approach can't satisfy research and production.
Summary of the invention
For solve contain overthrust fault upper lower burrs seismic properties can't once calculate finish, the problem of footwall information dropout, the invention provides a kind of seismic horizon and tomography and be merged into piece, contain the method for seismic properties of the geologic structure of overthrust fault with rapid extraction.
Another object of the present invention is to provide a kind of method that the seismic attributes data that contains overthrust fault is separately shown.
To achieve these goals, the present invention's architectonic seismic attribute extracting method of containing overthrust fault comprises the steps: that (a) carries out geologic horizon with the seismic interpretation method that contains overthrust fault and explain and fault interpretation; (b) the geologic horizon section with correspondence is connected with corresponding tomography, forms new layer position; (c) the levels connection is carried out along position of fault in new layer of position, forms the fault block of sealing or layer position of connection; (d) be connected layer position with connection according to the fault block that forms and calculate a seismic properties.
And, in described step (c), when tomography penetrates adjacent two layer positions, carry out the sealing of fault block, and the " locked in " operation of fault block carries out between two-layer; When tomography did not penetrate for 2 whens position layer by layer, only connect the levels position.
Seismic properties comprises body attribute, an edge layer attribute, an edge layer body attribute, interlayer body attribute.
And, when calculating along layer attribute, carry out geological data along geologic interpretation layer position and extract, perhaps this layer position moved up and down one regular time value or depth value, thereby carry out the data extraction; When calculating along layer body attribute, take tomography as the control border, calculate simultaneously the seismic properties of upper lower burrs at fault region; When computation layer mesosome attribute, take tomography as the control border, calculate simultaneously the seismic properties of upper lower burrs at fault region.
In addition, the described of extraction can be divided into the upper lower burrs demonstration along layer attribute data with along layer body attribute data in each overthrust fault zone.
The seismic attribute extracting method that contains overthrust fault according to the present invention, the method can be extracted seismic properties simultaneously to the geologic model upper lower burrs that contains overthrust fault, comprehensive utilization upper lower burrs data, increased the measurable area of Seismic Reservoir Prediction, saved seismic interpretation worker's working time, and make predict the outcome more comprehensively, more reasonable.
Description of drawings
Fig. 1 is according to the process flow diagram of the invention process form.
Fig. 2 illustrates according to geologic horizon of the present invention, as to contain overthrust fault and fault interpretation figure as a result.
Fig. 3 illustrates according to layer of the present invention position connection layout.
Fig. 4 illustrates tomography block diagram of the present invention.
Fig. 5 illustrates the seismic properties interlayer body attribute cutting position figure that obtains according to the present invention.
Fig. 6 and Fig. 7 are that upper dish and the lower wall of the attribute volume that extracts at whole 3-D data volume along cut-off rule wherein shows the result.
Embodiment
Before embodiments of the invention were described, the relational language that at first uses in the description of this invention was explained accordingly.
Geologic horizon is explained:, to geological data, then on geological data, laterally follows the trail of according to Seismic reflection character by well-log information demarcation layer position in geochron, and complete layer position identification on whole geological data, this process is called geologic horizon and explains.
Fault interpretation: by the Seismic reflection character of geological data, determine the position of each seismic fault, then spatially tomography is made up, finish plane and the spatial of tomography and sketch, this process is called fault interpretation.
Survey line: when construction two dimension, each equipment connections of the data that gather is got up, show as a two-dimensional line, be called survey line.
452 surveys line: as the survey line name, represent in numerous surveys line.
Main profile: in two-dimentional work progress, in order to implement underground structure, the survey line major part is to lay along the subsurface geological structure direction, this moment survey line is called by " main profile ".
Layer position section: during with fault segmentation, each section becomes layer position section to same layer position.
Below, with reference to accompanying drawing preferred implementation of the present invention is described.
Fig. 1 is the process flow diagram that contains the architectonic seismic attribute extracting method of overthrust fault according to of the present invention.
With reference to Fig. 1, according to attributes extraction method of the present invention, mainly comprise following step:
At step S1, finish geologic horizon with the seismic interpretation method that contains overthrust fault and explain and fault interpretation.Namely containing the overthrust fault zone, this interpretation procedure can repeat to pick up and show in the different time to same geologic horizon.Conventional seismic interpretation method can only can't repeat with picking up and showing an identical geologic horizon with interpretation software, but the present invention can with geological data pick up two or more identical geologic horizons.And explain that good layer position section and tomography are continuous in the horizontal, jump phenomena can not occur.
At step S2, the geologic horizon section of explanation results is connected with tomography, form new layer position.With the explanation results among the step S1 according to the main profile direction from a certain end of survey line, each section of the layer position of explaining coupled together with the tomography that intersects with its, forms a new layer position, new layer position will replace the geologic horizon of originally explanation to finish follow-up work.
At step S3, the levels position is carried out at position of fault in the new layer position that generates connect, form the fault block of sealing or the layer position of connection.When tomography penetrates adjacently when two-layer up and down, these two adjacent layer position need to be connected along line of rent, the layer position that connects will form the one by one fault block take tomography as the border, thereby finishes the fault block " locked in " operation.
At step S4, according to the fault block that forms be connected with connection layer position calculate a body attribute, along a layer attribute, along a layer body attribute, interlayer body attribute.Gu the calculating of timing window and set time attribute does not need the control of layer position, extracting method is fixed, and is not discussed at this.
Extraction along layer attribute is according to the layer position of sealing fault block, along the main profile direction, (or this layer position adds with newly-generated layer position, subtract a certain fixed value) be time (or degree of depth) reference mark, extract corresponding geological data and carry out certain mathematic(al) manipulation or some mathematic(al) manipulation combination, form the data volume of a new layer position type, this layer bit data body shows the attribute display that is this geological data with planar fashion, it should be noted that, the attribute that the method is extracted is repetition containing the overthrust fault zone, so each overthrust fault zone can be divided into the upper lower burrs mode and show.
The extracting method of edge layer body attribute and edge layer Attribute class are seemingly, different is, the interlayer attribute is between certain two layer position, include all geological data inputs between two-layer in the calculating category, carry out certain mathematic(al) manipulation or some mathematic(al) manipulation combination, the result of mathematic(al) manipulation only has a value at the seismic trace that does not contain overthrust fault, containing the overthrust fault zone, need to calculate respectively the reference mark according to upper lower burrs and extract attribute, form the data volume of new layer position type, this layer bit data body is along a layer body attribute display with the planar fashion demonstration, equally, the attribute that the method is extracted is repetition containing the overthrust fault zone, and each overthrust fault zone can be divided into the upper lower burrs mode and show.
For interlayer body attribute, and along layer body Attribute class seemingly, different is that the mathematic(al) manipulation result of interlayer body attribute is the identical result of number of data points who calculates with participating in.The mathematic(al) manipulation of interlayer body attribute be between two geologic horizons with each data point node-by-node algorithm, the number of data points of generation is identical with the input number of data points; And an edge layer body attribute is that all data points of same track data between two geologic horizons are finished mathematic(al) manipulation, generates the data of a point.
Below, describe in conjunction with the embodiments embodiments of the invention in detail.
Fig. 2 illustrates according to the geologic horizon that contains overthrust fault of the present invention and fault interpretation figure as a result.
With reference to Fig. 2, explain and fault interpretation with the geologic horizon that 452 surveys line (not shown) in DKH work area are finished among the described step S1, the result who obtains is as shown in Figure 1.Among Fig. 1, transverse axis is CDP number (numbering of the data pickup point on 452 surveys line), and the longitudinal axis is time shaft (unit: ms).
Wherein, the geologic horizon that contains overthrust fault is explained, requires seismic horizon T1f4, T1f3ct, T1p21, T1p11 segmentation to explain, is about to same layer position take tomography D1, D2 as cut-point, is divided into different sections and makes an explanation, rather than be linked to be a layer bit line.Each section has a layer position name, and has different segment numbers, so that the layer position of explaining can the failure because of repetition on vertically at section, shown in layer position section T1f4-a, the T1f4-b of Fig. 2, T1f4-c.
Fig. 3 illustrates according to layer of the present invention position connection layout.
With reference to Fig. 3, finish being connected of each layer position section and tomography among the described step S2 with 452 surveys line in DKH work area, to form new layer position T1f4-A, T1f3ct-A, T1p21-A, T1p11-A.Wherein transverse axis is CDP number, and the longitudinal axis is time shaft (unit: ms).
And, when the geologic horizon section of explaining is connected with tomography, needs corresponding tomography section to connect corresponding layer position section, and can not misplace, such as layer position section T1f4-a be connected with tomography D1, the two ends of a layer section T1f4-b are connected with tomography D1, D2 respectively etc.
Fig. 4 illustrates tomography block diagram of the present invention.
With reference to Fig. 4, set up tomography, the layer position piecemeal result of 452 surveys line in DKH work area, form closed one by one zone, i.e. fault block T1f3ct-I, T1f3ct-II, T1f3ct-III, T1p21-I etc.
In addition, the fault block " locked in " operation carries out between two-layer, only has those tomographies that penetrate adjacent two layers just to be used to carry out the piece sealing, in Fig. 3, tomography D1 penetrated bed position T1f4, T1f3ct, therefore tomography D2 penetrated bed position T1f4, T1f3ct, T1p11, T1p21 need to carry out the piece sealing.Do not penetrate sealing two layer by layer the tomography of position only be used for carrying out layer position and connect, seal and be not used for carrying out piece.
In addition, in step S4, when extracting along layer attribute, can carry out geological data along geologic interpretation layer position j2s, f44 and extract, also this layer position can be moved up and down a regular time value (or be depth value in Depth Domain) and carry out the data extraction; When extracting along layer body attribute, need to take tomography as the control border, calculate simultaneously the seismic properties of upper dish T1f3ct-I and lower wall T1f3ct-II at fault region; During extract layer mesosome attribute, with identical along layer body attributes extraction, also need at fault region take tomography as the control border, calculate simultaneously the seismic properties of upper lower burrs.
Fig. 5 illustrates the seismic properties interlayer body attribute cutting position figure that obtains according to the present invention.
Step S4 according to the method for the invention, the 452 survey line upper strata position j2s that calculate the DKH work area arrive after trisection seismic properties split position line j2f4-1, the j2f4-2 of layer position f44, extract respectively the geological data of the geology that is divided into trisection according to the split position line, to form attribute volume, for example geological data between extract layer position j2s and the split position line j2f4-1.The present invention is provided with two split position lines, but can select as required suitable seismic properties split position line quantity.
Fig. 6 and Fig. 7 are that upper dish and the lower wall of the RMS amplitude attribute volume that extracts at whole 3-D data volume along cut-off rule wherein shows the result.Among Fig. 6 and Fig. 7, T500 represents the 500th road, and L300 represents the 300th line, and these all are the survey line numberings of three geological datas, and other by that analogy; In addition, the horizontal ordinate among the figure and ordinate are as benchmark take Beijing coordinate system in 1954.
The scope of irregular polygon delineation is for containing the overthrust fault zone among Fig. 6 and Fig. 7, and these two figure are different in the overthrust fault zone, and other zones are identical.
Because attributes extraction method of the present invention is the computed tomography upper lower burrs simultaneously, can save at least 1/2 workload, the data of footwall are credible, can be used for carrying out reservoir prediction, and therefore measurable area increases.Reservoir border performance with faults control is obvious.The present invention can solve the seismic properties that contains overthrust fault and extract and problem analysis, and the reservoir prediction in the corresponding oil-gas exploration and development, oil and gas detection etc. have direct effect.
The invention is not restricted to above-described embodiment, without departing from the present invention, can carry out various changes and modifications.
Claims (1)
1. an architectonic seismic attribute extracting method that contains overthrust fault is characterized in that comprising the steps:
(a) carrying out geologic horizon with the seismic interpretation method that contains overthrust fault explains and fault interpretation;
(b) the geologic horizon section with explanation results is connected with tomography, forms new layer position;
(c) the levels connection is carried out along position of fault in new layer of position, forms the fault block of sealing or layer position of connection;
(d) be connected layer position with connection according to the fault block that forms and calculate a seismic properties,
Wherein, in described step (c), when tomography penetrates adjacent two layer positions, carry out the sealing of fault block, and the " locked in " operation of fault block carries out between two-layer; When tomography did not penetrate for 2 whens position layer by layer, only connect the levels position,
In described step (d), calculative seismic properties comprises body attribute, an edge layer attribute, an edge layer body attribute, interlayer body attribute,
And, when calculating along layer attribute, carry out geological data along geologic interpretation layer position and extract, perhaps this layer position moved up and down one regular time value or depth value, thereby carry out the data extraction; When calculating along layer body attribute, take tomography as the control border, calculate simultaneously the seismic properties of upper lower burrs at fault region; When computation layer mesosome attribute, take tomography as the control border, calculate simultaneously the seismic properties of upper lower burrs at fault region,
And the described of extraction can be divided into the upper lower burrs demonstration along layer attribute data with along layer body attribute data in each overthrust fault zone.
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| CN107991703A (en) * | 2017-11-28 | 2018-05-04 | 北京金双狐油气技术有限公司 | A kind of reversed fault interpretation results storage method |
| CN112505758B (en) * | 2020-11-17 | 2021-10-26 | 中国石油集团工程咨询有限责任公司 | Method for processing seismic fault image of complex geological structure based on fault bifurcation structure model |
| CN112946734A (en) * | 2021-02-04 | 2021-06-11 | 山东地码信息科技有限公司 | Multi-mode matching seismic horizon fast tracking method and device |
| CN115822563B (en) * | 2022-12-30 | 2023-06-09 | 中国石油化工股份有限公司 | Ultra-deep fracture-control hole type oil and gas reservoir high-yield well design method |
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Application publication date: 20111019 Assignee: Sichuan Ji Saite Science and Technology Ltd. Assignor: China National Petroleum Corporation Chuanqing Drilling Engineering Geophysical Exploration Company Ltd. Contract record no.: 2014510000163 Denomination of invention: Seismic attribute extracting method for geologic structure containing over-thrust fault Granted publication date: 20130403 License type: Exclusive License Record date: 20141016 |
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