CN103149137A - Constant-pressure steady-state gas permeability measuring instrument - Google Patents
Constant-pressure steady-state gas permeability measuring instrument Download PDFInfo
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- CN103149137A CN103149137A CN201110401538XA CN201110401538A CN103149137A CN 103149137 A CN103149137 A CN 103149137A CN 201110401538X A CN201110401538X A CN 201110401538XA CN 201110401538 A CN201110401538 A CN 201110401538A CN 103149137 A CN103149137 A CN 103149137A
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Abstract
The invention relates to a constant-pressure steady-state gas permeability testing instrument. The constant-pressure steady-state gas permeability testing instrument is characterized in that: a gas storage cylinder (4) is internally provided with a piston (2); the piston (2) is provided with a balancing weight block (3); the left end of a rock core holder (8) is connected with one end of a drier (7) through a pipeline while the other end of the drier (7) is connected with a gas outlet of the gas storage cylinder (8); the gas inlet of the gas storage cylinder (4) is connected with an inflator pump (1) through a pipeline; the right end of the rock core holder (8) is connected with a gas flowmeter and a soap-film gas flowmeter (13) through a pipeline; the outer wall of the rock core holder (8) is provided with a ring press hole; and the ring press hole of the rock core holder (8) is connected with a ring press pump (5) through the pipeline. Based on a steady pressure principle, the constant-pressure steady-state gas permeability testing instrument adopts an internally arranged inflator pump for inflation to stabilize inlet and outlet pressures of the rock core, so that precision and stability of the rock core test are improved, and the testing error of the rock core permeability is controlled within 1%. The constant-pressure steady-state gas permeability testing instrument, disclosed by the invention, has advantages of simple structure, convenient operation, steady performance and good repeatability.
Description
Technical field:
The present invention relates to a kind of level pressure stable state perm-plug method instrument, belong to petroleum exploration and development evaluating reservoir research experiment equipment technical field.
Background technology:
The permeability of reservoir rock is defined as the ability that reservoir rock allows fluid to pass through, and is used for the size of tolerance hydrocarbon zone permeability, is indispensable petrophysical parameter in oil-gas exploration and development and evaluating reservoir process.Therefore, measuring exactly the rock permeability tool is of great significance.
Usually our said permeability is the absolute permeability of rock, mainly records by the perm-plug method instrument.
The existing perm-plug method instrument in laboratory is divided into two classes at present: unstable state method and steady state method permeameter.Unstable state method permeameter need to be demarcated a constant B when measuring rock permeability, the numerical value of constant B is different due to the difference of experiment condition, can cause the permeability value difference of calculating; The steady state method permeameter is based upon on the basis of Darcy's law, have the gas slippage effect during due to mensuration, and the slippage effect of gas under different mean pressures is different, makes the permeability that records also different.
As above, all there is serious deficiency in these two kinds of methods, are difficult to the permeability of Measurement accuracy rock.Survey permeameter therefore need develop a kind of Novel air, to reduce the error at measurment of core permeability, the degree of accuracy that improves evaluating reservoir, oil-gas exploration and development solution formulation is had great importance.
Summary of the invention:
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of level pressure stable state perm-plug method instrument, can be on the basis of principle of stabilized voltage, adopt built-in inflator pump inflation, the inlet and outlet pressure of constant rock core, thereby improve the precision and stability of core test, have simple in structure, easy to operate, stable performance, characteristics that Repeatability is good.
The present invention realizes above-mentioned purpose by following technical solution.
In a kind of structure of level pressure stable state perm-plug method instrument, be provided with inflator pump, piston, balancing weight, air drum, ring press pump, electron pressure indicator gauge, exsiccator, core holding unit, ring pressure indicator gauge, the first gas meter, the second gas meter, the 3rd gas meter, digital Bubble Flow-meter; Be provided with piston in air drum, be added with balancing weight on piston; Piston is steel body solid slug, and the mercury seal ring is housed on piston, seals by the mercury seal ring between air drum and piston; The left end of core holding unit is connected with an end of exsiccator by pipeline, and the other end of exsiccator is connected by pipeline with the gas outlet of air drum; The air intake opening of air drum is connected by pipeline with inflator pump; The right-hand member of core holding unit is connected by pipeline with digital Bubble Flow-meter with the first gas meter, the second gas meter, the 3rd gas meter; Be provided with ring and press the hole on the outer wall of core holding unit, the ring of core holding unit presses the Kong Yuhuan press pump to be connected by pipeline; Be provided with the electron pressure indicator gauge on the pipeline that connects exsiccator and core holding unit; Be provided with ring and press indicator gauge on the pipeline of the ring pressure Kong Yuhuan press pump that connects core holding unit.
The present invention compared with prior art, on the basis of principle of stabilized voltage, adopt built-in inflator pump inflation, the inlet and outlet pressure of constant rock core, improved the precision and stability of core test, the error at measurment of core permeability is controlled in 1%, has simple in structure, easy to operate, stable performance, characteristics that Repeatability is good.
Description of drawings:
Fig. 1 is general structure schematic diagram of the present invention.
In the drawings: 1. inflator pump, 2. piston, 3. balancing weight, 4. air drum, 5. the ring press pump, 6. the electron pressure indicator gauge, 7. exsiccator, 8. core holding unit, 9. ring is pressed indicator gauge, 10. the first gas meter, 11. second gas meters, 12. the 3rd gas meters, 13. digital Bubble Flow-meter.
Embodiment:
A kind of level pressure stable state of the present invention perm-plug method instrument presses indicator gauge 9, the first gas meter 10, the second gas meter 11, the 3rd gas meter 12, digital Bubble Flow-meter 13 to form by inflator pump 1, piston 2, balancing weight 3, air drum 4, ring press pump 5, electron pressure indicator gauge 6, exsiccator 7, core holding unit 8, ring; Be provided with piston 2 in air drum 4, be added with balancing weight 3 on piston 2; Piston 2 is steel body solid slug, and the mercury seal ring is housed on piston 2, seals by the mercury seal ring between air drum 4 and piston 2; The left end of core holding unit 8 is connected with an end of exsiccator 7 by pipeline, and the other end of exsiccator 7 is connected by pipeline with the gas outlet of air drum 4; The air intake opening of air drum 4 is connected by pipeline with inflator pump 1; The right-hand member of core holding unit 8 is connected by pipeline with digital Bubble Flow-meter 13 with the first gas meter 10, the second gas meter 11, the 3rd gas meter 12; Be provided with ring and press the hole on the outer wall of core holding unit 8, the ring of core holding unit 8 presses Kong Yuhuan press pump 5 to be connected by pipeline; Be provided with electron pressure indicator gauge 6 on the pipeline that connects exsiccator 7 and core holding unit 8; Be provided with ring and press indicator gauge 9 on the pipeline of the ring pressure Kong Yuhuan press pump 5 that connects core holding unit 8.
When using level pressure stable state perm-plug method instrument of the present invention and carrying out the core permeability experiments of measuring, can carry out according to the following steps:
1, first dry rock core to be measured before experiment, and accurately measure its length and diameter; Rock core to be measured is put into core holding unit 8, two ends and the ring pressure pipeline of core holding unit 8 are tightened;
2, then open ring press pump 5, will encircle pressure and add to 2MPa;
3, open 1 pair of air drum 4 of inflator pump and inflate, when moving to air drum 4 centre position on piston 2, stop inflation;
4, tighten the valve of the front end atmospheric valve of core holding unit 8, the gas outlet valve of opening air drum 4 and the first gas meter 10, the second gas meter 11, the 3rd gas meter 12, allow gas pass through core holding unit 8, observe the mobility status of float in the first gas meter 10, the second gas meter 11, the 3rd gas meter 12, the reading of gas flow in record the first gas meter 10, the second gas meter 11, the 3rd gas meter 12 after float is stable;
5, pack in digital Bubble Flow-meter 13 after appropriate soap lye, again open 1 pair of air drum 4 of inflator pump and inflate, stop after a period of time, and utilize stopwatch to record soap-film time that the rising certain distance needs in glass tube in digital Bubble Flow-meter 13;
6, test again after at the bottom of the piston in air drum 42 is fallen tin next time; 4-5 time so repeatedly; After experiment is completed, the venting ring is pressed, and removal of core; Can carry out new round experiment after changing rock core.
Claims (4)
1. level pressure stable state perm-plug method instrument, press indicator gauge (9), the first gas meter (10), the second gas meter (11), the 3rd gas meter (12), digital Bubble Flow-meter (13) to form by inflator pump (1), air drum (4), electron pressure indicator gauge (6), ring, it is characterized in that being provided with piston (2), balancing weight (3), ring press pump (5), exsiccator (7), core holding unit (8) in its structure; Be provided with piston (2) in air drum (4), be added with balancing weight (3) on piston (2); The left end of core holding unit (8) is connected by the end of pipeline with exsiccator (7), and the other end of exsiccator (7) is connected by pipeline with the gas outlet of air drum (4); The air intake opening of air drum (4) is connected by pipeline with inflator pump (1); The right-hand member of core holding unit (8) is connected by pipeline with the first gas meter (10), the second gas meter (11), the 3rd gas meter (12) and digital Bubble Flow-meter (13); Be provided with ring and press the hole on the outer wall of core holding unit (8), the ring of core holding unit (8) presses Kong Yuhuan press pump (5) to be connected by pipeline.
2. a kind of level pressure stable state perm-plug method instrument according to claim 1, is characterized in that on piston (2), the mercury seal ring being housed, and seals by the mercury seal ring between air drum (4) and piston (2).
3. a kind of level pressure stable state perm-plug method instrument according to claim 2, is characterized in that being provided with electron pressure indicator gauge (6) on the pipeline that connects exsiccator (7) and core holding unit (8); Be provided with ring and press indicator gauge (9) on the pipeline of the ring pressure Kong Yuhuan press pump (5) that connects core holding unit (8).
4. a kind of level pressure stable state perm-plug method instrument according to claim 3, is characterized in that piston (2) is steel body solid slug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110401538XA CN103149137A (en) | 2011-12-06 | 2011-12-06 | Constant-pressure steady-state gas permeability measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110401538XA CN103149137A (en) | 2011-12-06 | 2011-12-06 | Constant-pressure steady-state gas permeability measuring instrument |
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| CN103149137A true CN103149137A (en) | 2013-06-12 |
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| CN201110401538XA Pending CN103149137A (en) | 2011-12-06 | 2011-12-06 | Constant-pressure steady-state gas permeability measuring instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940719A (en) * | 2014-04-15 | 2014-07-23 | 西安科技大学 | Coal body permeability characteristic testing system and method |
| CN104713812A (en) * | 2015-04-01 | 2015-06-17 | 西南石油大学 | Calibration method of core-based gas permeability measuring device |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN107966186A (en) * | 2018-01-11 | 2018-04-27 | 中国计量大学 | A kind of continuous type gas collection and metering device |
| CN111999232A (en) * | 2020-08-26 | 2020-11-27 | 三峡大学 | Test device and test method for measuring change of permeability of rock core along with pressure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263360A (en) * | 1992-04-17 | 1993-11-23 | Halliburton Company | Low permeability subterranean formation testing methods and apparatus |
| CN202383047U (en) * | 2011-12-06 | 2012-08-15 | 长江大学 | Constant pressure steady state gas permeability measuring instrument |
-
2011
- 2011-12-06 CN CN201110401538XA patent/CN103149137A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263360A (en) * | 1992-04-17 | 1993-11-23 | Halliburton Company | Low permeability subterranean formation testing methods and apparatus |
| CN202383047U (en) * | 2011-12-06 | 2012-08-15 | 长江大学 | Constant pressure steady state gas permeability measuring instrument |
Non-Patent Citations (1)
| Title |
|---|
| 黄华智等: ""一种新型定压稳态法气测渗透率仪的研究应用"", 《内江科技》, no. 1, 31 January 2011 (2011-01-31), pages 1 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940719A (en) * | 2014-04-15 | 2014-07-23 | 西安科技大学 | Coal body permeability characteristic testing system and method |
| CN104713812A (en) * | 2015-04-01 | 2015-06-17 | 西南石油大学 | Calibration method of core-based gas permeability measuring device |
| CN104713812B (en) * | 2015-04-01 | 2018-05-22 | 西南石油大学 | A kind of bearing calibration based on rock core gas permeability measuring device |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN105842425B (en) * | 2016-05-23 | 2017-12-01 | 青岛中瑞泰软控科技股份有限公司 | A kind of core holding unit and dynamic filtration experimental provision |
| CN107966186A (en) * | 2018-01-11 | 2018-04-27 | 中国计量大学 | A kind of continuous type gas collection and metering device |
| CN111999232A (en) * | 2020-08-26 | 2020-11-27 | 三峡大学 | Test device and test method for measuring change of permeability of rock core along with pressure |
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Application publication date: 20130612 |