CN105136643A - Uniflow Hg-injection system under effective overburden pressure and realization method thereof - Google Patents
Uniflow Hg-injection system under effective overburden pressure and realization method thereof Download PDFInfo
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- CN105136643A CN105136643A CN201510525664.4A CN201510525664A CN105136643A CN 105136643 A CN105136643 A CN 105136643A CN 201510525664 A CN201510525664 A CN 201510525664A CN 105136643 A CN105136643 A CN 105136643A
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Abstract
The invention discloses a uniflow Hg-injection system under effective overburden pressure and a realization method thereof. The system comprises a high-pressure rock core chamber, a micrometering pump whose input end is connected with the input end of the high-pressure rock core chamber via a first pipe, a valve, and a pressure meter, and a power pump which is connected with a side hole of the rock core chamber, for providing effective overburden pressure, via a second pipe, a valve and a meter; the other end of the high-pressure rock core chamber is connected with a vacuum pump via a pipe and a vacuum pressure meter; the system also comprises a mercury break-through display unit connected with two ends of the high-pressure rock core chamber; the first pipe and the second pipe are each provided with a pressure meter. The mercury injection capillary pressure curve measured in the invention can represent genuine pore structure characteristics, pore throat size distribution, mutual communication relation of oil gas reservoir rock, break-through pressure of mercury for rock core, and fluid flow condition during oil gas reservoir development, thereby providing important parameters for exploring and development of an oil gas reservoir.
Description
Technical field
The present invention relates to the way flow dynamic pressure mercury system under a kind of effective overburden pressure and its implementation.
Background technology
At present, the technology measuring the distribution of rock throat size is both at home and abroad all that mercury is injected rock core by the mode adopting four sides to enter mercury, then calculates throat radius r according to the theoretical formula Pc=2 σ cos θ/r of capillary pressure.
The pressure mercury technology of mercury is entered at this four sides, can only measure the throat size distribution under surface condition.And because oil and gas reservoir is under the Temperature-pressure Conditions of underground hundreds of rice to a few km, therefore, the combined action of temperature and pressure can make the hole of reservoir rock, larynx diminish by the extruding of temperature and pressure, especially reducing of venturi r will affect the throat size distribution of reservoir rock.Thus, the technology adopting existing mensuration rock throat size to distribute will badly influence the exploration and development of oil gas.
Summary of the invention
For above-mentioned technical deficiency, the invention provides the way flow dynamic pressure mercury system under a kind of effective overburden pressure and its implementation, its parameter of pore structure obtained truly can reflect the feature of the pore structure characteristic of hydrocarbon-bearing pool reservoir, the distribution of Pore throat size and the relation that is interconnected.
To achieve these goals, the technical solution used in the present invention is as follows:
Mercury way flow dynamic pressure mercury system under effective overburden pressure, this system comprises high pressure core chamber, the Micro-metering Pumps that output terminal is connected with this high pressure core chamber input end by the first pipeline, by second pipe and the power pump providing core chamber's side opening of burden pressure to be connected, by the vacuum pump that the 3rd pipeline is connected with high pressure core chamber endpiece, and display unit broken through by the mercury be connected with high pressure core chamber two ends; Described first pipeline and second pipe are provided with valve and digital pressure gauge all separately; Described 3rd pipeline is respectively equipped with valve and pressure vacuum gauge.
Based on said system, present invention also offers the implementation method of the mercury way flow dynamic pressure mercury system under this effective overburden pressure, comprise the following steps:
(1) employing conventional determining method does the porosity determination under effective overburden pressure to rock core, obtains the formation porosity under different pressures and pore-body product value;
(2) rock core will be tested dry, and put into high pressure core chamber;
(3) start power pump, make the burden pressure in high pressure core chamber maintain the value of its setting;
(4) start vacuum pump to find time to rock core, until close the valve on the 3rd pipeline after the vacuum tightness required;
(5) Micro-metering Pumps is started, from low to high mercury is injected into the rock core in high pressure core chamber by the pressure intervals of design, record the amount of mercury injection rate IR of pressure and relevant pressure point simultaneously, utilize pressure during mercury breakthrough display unit record mercury breakthrough rock core, until stop when reaching the maximum pressure of design, the mercury uniflux mercury pressuring data under effective overburden pressure can be obtained;
(6) according to the pore-body product value under the effective overburden pressure of respective point, pressure mercury data processing method conveniently processes mercury uniflux mercury pressuring data, obtains the mercury uniflux intrusive mercury curve of this rock core under effective overburden pressure, eigenvalue of curve, normal state and abnormal probability characteristics value, throat distribution frequency plot, the correlation parameter of permeability contribution plot and chart.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention is provided with high pressure core chamber, power pump, display unit broken through by Micro-metering Pumps and mercury, it passes through porosity determination, rock core is dried, inject mercury, the mode of rock core pressure broken through by record and display mercury, obtain the mercury uniflux mercury pressuring data under effective overburden pressure condition, and then obtain the mercury uniflux intrusive mercury curve of rock core under effective overburden pressure condition, eigenvalue of curve, normal state and abnormal probability characteristics value, throat distribution frequency plot, the parameters such as permeability contribution plot, these parameters can reflect the pore structure characteristic of true hydrocarbon-bearing pool reservoir rock, the distribution of Pore throat size, be interconnected relation, and the fluid in developing of reservoirs employs situation.The present invention is that the explore of oil gas field provides truly, effective reference data, facilitates the exploration and development to oil gas field to a great extent.
(2) reasonable in design of the present invention, be easy to promote, therefore, compared to existing technology, there is outstanding substantive distinguishing features and significant progressive.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is conventional and intrusive mercury curve under effective overburden pressure condition.
Fig. 3 is conventional and throat distribution histogram under effective overburden pressure condition.
Wherein, the parts name that Reference numeral is corresponding is called:
1-high pressure core chamber, 2-power pump, 3-Micro-metering Pumps, 4-digital pressure gauge, 5-mercury break through display unit, 6-vacuum meter, 7-vacuum pump, 8,9,10-valve.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
As shown in Figure 1, the invention provides the mercury way flow dynamic pressure mercury system under a kind of effective overburden pressure, the parameter of pore structure that the pressure mercury data that this system obtains is obtained after treatment truly can reflect the true pore structure characteristic of hydrocarbon-bearing pool reservoir, the distribution of Pore throat size and the relation that is interconnected.Described pressure mercury system comprises high pressure core chamber 1, power pump 2, Micro-metering Pumps 3, mercury breakthrough display unit 5, vacuum meter 6 and vacuum pump 7.Described Micro-metering Pumps 3 output terminal is connected with high pressure core chamber 1 input end by the first pipeline, and power pump 2 is then connected with high pressure core chamber side opening by second pipe, and the first pipeline and second pipe are provided with valve 8,10 and digital pressure gauge 4 all separately.Described vacuum pump 7 is connected with high pressure core chamber 1 endpiece by the 3rd pipeline, and described vacuum meter 6 is arranged on the 3rd pipeline, and the 3rd pipeline is also provided with valve 9.And mercury to break through display unit 5 be prior art, it is connected with high pressure core chamber 1 two ends, situation during for recording and showing mercury breakthrough rock core.In the present embodiment, described power pump can provide the burden pressure of 200MPa, and Micro-metering Pumps 3 then can provide the mercury injection pressure of 100MPa.
Main working process of the present invention is as follows:
First, need porosity determination rock core done under effective overburden pressure condition, so that the formation porosity under obtaining different pressures and pore-body product value.
Then, rock core is dried, and puts into High Temperature High Pressure core chamber 1, start power pump 2 to provide corresponding burden pressure, open vacuum pump 7 pairs of system pump down, valve-off 9 and vacuum pump 7 when vacuum meets the requirements.Then Micro-metering Pumps 3 is restarted, in high pressure core chamber 1, slowly mercury is injected from low to high according to the pressure intervals of design, utilize tensimeter and Micro-metering Pumps 4 to record pressure and mercury injection rate IR simultaneously, and utilize mercury breakthrough display unit 5 to record mercury breakthrough pressure.
When pressure reaches maximal value, stop the injection of mercury, now, the mercury uniflux mercury pressuring data under effective stress condition can be obtained, according to the pore-body product value under the formation condition of respective point, and pressure mercury data processing method conveniently processes mercury uniflux mercury pressuring data, obtain the parameter value of the mercury uniflux intrusive mercury curve of rock core under effective stress condition, eigenvalue of curve, normal state and abnormal probability characteristics value, throat distribution frequency plot, permeability contribution plot.Finally, according to parameter value, the true pore structure characteristic of hydrocarbon-bearing pool reservoir can be obtained, and the distribution of Pore throat size and the relation that is interconnected.Meanwhile, according to the formation condition mercury way flow dynamic pressure mercury that the reservoir pressure of actual hydrocarbon-bearing pool designs, its data also can reflect that the fluid in developing of reservoirs employs situation.Intrusive mercury curve under conventional and effective overburden pressure condition and throat distribution histogram are distinguished as shown in Figure 2,3.In Fig. 2, the curve above being positioned at is the intrusive mercury curve under effective stress, and the curve being positioned at below is conventional intrusive mercury curve.
The present invention, by a kind of pressure mercury system completely newly of design, breaches the restriction of prior art, achieves innovation well.Principle process designed by the present invention truly can reflect the pore structure characteristic of hydrocarbon-bearing pool reservoir, the distribution of Pore throat size and the relation that is interconnected, thus lays a solid foundation for the exploration and development of oil gas field.
Above-described embodiment is only the present invention's preferably one of implementation; should in order to not limit the scope of the invention; all changes of under body design thought of the present invention and spirit, technical solution of the present invention being made or polishing; or carry out substitute equivalents; its technical matters solved is in fact still consistent with the present invention, all should within protection scope of the present invention.
Claims (2)
1. the way flow dynamic pressure mercury system under effective overburden pressure, it is characterized in that, this system comprises high pressure core chamber (1), the Micro-metering Pumps (3) that output terminal is connected with this high pressure core chamber (1) input end by the first pipeline, by second pipe and the power pump (2) providing core chamber's side opening of burden pressure to be connected, by the vacuum pump (7) that the 3rd pipeline is connected with high pressure core chamber (1) endpiece, and display unit (5) broken through by the mercury be connected with high pressure core chamber (1) two ends; Described first pipeline and second pipe are provided with valve and digital pressure gauge all separately; Described 3rd pipeline is respectively equipped with valve and pressure vacuum gauge (6).
2. an implementation method for the way flow dynamic pressure mercury system under effective overburden pressure, is characterized in that, comprise the following steps:
(1) employing conventional determining method does the porosity determination under effective overburden pressure to rock core, obtains the formation porosity under different pressures and pore-body product value;
(2) rock core will be tested dry, and put into high pressure core chamber;
(3) start power pump, make the burden pressure in high pressure core chamber maintain the value of its setting;
(4) start vacuum pump to find time to rock core, until close the valve on the 3rd pipeline after the vacuum tightness required;
(5) Micro-metering Pumps is started, from low to high mercury is injected into the rock core in high pressure core chamber by the pressure intervals of design, record the amount of mercury injection rate IR of pressure and relevant pressure point simultaneously, utilize pressure during mercury breakthrough display unit record mercury breakthrough rock core, until stop when reaching the maximum pressure of design, the mercury uniflux mercury pressuring data under effective overburden pressure can be obtained;
(6) according to the pore-body product value under the effective overburden pressure of respective point, pressure mercury data processing method conveniently processes mercury uniflux mercury pressuring data, obtains the mercury uniflux intrusive mercury curve of this rock core under effective overburden pressure, eigenvalue of curve, normal state and abnormal probability characteristics value, throat distribution frequency plot, the correlation parameter of permeability contribution plot and chart.
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| CN201510525664.4A CN105136643B (en) | 2015-08-25 | 2015-08-25 | The implementation method of one-way flow dynamic pressure mercury system under effective overburden pressure |
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| CN201510525664.4A CN105136643B (en) | 2015-08-25 | 2015-08-25 | The implementation method of one-way flow dynamic pressure mercury system under effective overburden pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673003A (en) * | 2015-12-29 | 2016-06-15 | 中国石油天然气股份有限公司 | Tight oil exploitation physical simulation test method |
| CN105842138A (en) * | 2016-03-25 | 2016-08-10 | 南通市飞宇石油科技开发有限公司 | Mercury column interface automatic regulation system and rock core pore structure measuring instrument |
| CN107748125A (en) * | 2017-08-30 | 2018-03-02 | 中国石油化工股份有限公司 | Intrusive mercury curve measurement system and assay method based on liquid level constant method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673003A (en) * | 2015-12-29 | 2016-06-15 | 中国石油天然气股份有限公司 | Tight oil exploitation physical simulation test method |
| CN105673003B (en) * | 2015-12-29 | 2019-05-07 | 中国石油天然气股份有限公司 | A kind of fine and close oil exploitation physical simulation experiment method |
| CN105842138A (en) * | 2016-03-25 | 2016-08-10 | 南通市飞宇石油科技开发有限公司 | Mercury column interface automatic regulation system and rock core pore structure measuring instrument |
| CN105842138B (en) * | 2016-03-25 | 2018-11-16 | 南通市飞宇石油科技开发有限公司 | A kind of mercury column interface automatic regulating system and rock core pore structure analyzer |
| CN107748125A (en) * | 2017-08-30 | 2018-03-02 | 中国石油化工股份有限公司 | Intrusive mercury curve measurement system and assay method based on liquid level constant method |
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| CN105136643B (en) | 2018-07-17 |
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