CN202383047U - Constant pressure steady state gas permeability measuring instrument - Google Patents
Constant pressure steady state gas permeability measuring instrument Download PDFInfo
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- CN202383047U CN202383047U CN2011205030077U CN201120503007U CN202383047U CN 202383047 U CN202383047 U CN 202383047U CN 2011205030077 U CN2011205030077 U CN 2011205030077U CN 201120503007 U CN201120503007 U CN 201120503007U CN 202383047 U CN202383047 U CN 202383047U
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Abstract
The utility model 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 utility model, has the advantages of simple structure, convenient operation, steady performance and good repeatability.
Description
Technical field:
The utility model relates to a kind of level pressure stable state perm-plug method appearance, belongs 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 to measure the size of hydrocarbon zone permeability, is indispensable petrophysical parameter in oil-gas exploration and development and the evaluating reservoir process.Therefore, measure rock permeability exactly and have crucial meaning.
Usually our said permeability is the absolute permeability of rock, mainly records through the perm-plug method appearance.
The existing perm-plug method appearance in laboratory is divided into two types at present: unstable state method and steady state method permeameter.Unstable state method permeameter need be demarcated a constant B when measuring rock permeability, the numerical value of constant B is difference owing 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 owing 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 accurate Measuring permeability of rock.So need develop a kind of novel perm-plug method appearance,, the degree of accuracy that improves evaluating reservoir, oil-gas exploration and development solution formulation had great importance to reduce the error at measurment of core permeability.
Summary of the invention:
In order to overcome the deficiency of prior art; The purpose of the utility model is to provide a kind of level pressure stable state perm-plug method appearance; Can 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 the stability of core test, have simple in structure, easy to operate, stable performance, characteristics that the repetition performance is good.
The utility model is realized above-mentioned purpose through following technical scheme.
In a kind of structure of level pressure stable state perm-plug method appearance, 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, first gas meter, second gas meter, the 3rd gas meter, digital Bubble Flow-meter; In air drum, be provided with piston, on piston, be added with balancing weight; Piston is a steel body solid slug, and the mercury seal ring is housed on piston, seals through the mercury seal ring between air drum and the piston; The left end of core holding unit is connected with an end of exsiccator through pipeline, and the other end of exsiccator is connected through pipeline with the gas outlet of air drum; The air intake opening of air drum is connected through pipeline with inflator pump; The right-hand member of core holding unit is connected through pipeline with digital Bubble Flow-meter with first gas meter, second gas meter, the 3rd gas meter; On the outer wall of core holding unit, be provided with ring and press the hole, the ring of core holding unit presses the Kong Yuhuan press pump to be connected through pipeline; On the pipeline that connects exsiccator and core holding unit, be provided with the electron pressure indicator gauge; On the pipeline of the ring pressure Kong Yuhuan press pump that connects core holding unit, be provided with ring and press indicator gauge.
The utility model compared with prior art; On the basis of principle of stabilized voltage; Adopt the inflation of built-in inflator pump, the inlet and outlet pressure of constant rock core has improved the precision and the 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 the repetition performance is good.
Description of drawings:
Fig. 1 is the general structure synoptic diagram of the utility model.
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. 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 utility model perm-plug method appearance presses indicator gauge 9, first gas meter 10, 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; In air drum 4, be provided with piston 2, on piston 2, be added with balancing weight 3; Piston 2 is a steel body solid slug, and the mercury seal ring is housed on piston 2, seals through the mercury seal ring between air drum 4 and the piston 2; The left end of core holding unit 8 is connected with an end of exsiccator 7 through pipeline, and the other end of exsiccator 7 is connected through pipeline with the gas outlet of air drum 4; The air intake opening of air drum 4 and inflator pump 1 are connected through pipeline; The right-hand member of core holding unit 8 and first gas meter 10, second gas meter 11, the 3rd gas meter 12 and digital Bubble Flow-meter 13 are connected through pipeline; On the outer wall of core holding unit 8, be provided with ring and press the hole, the ring of core holding unit 8 presses Kong Yuhuan press pump 5 to be connected through pipeline; On the pipeline that connects exsiccator 7 and core holding unit 8, be provided with electron pressure indicator gauge 6; On the pipeline of the ring pressure Kong Yuhuan press pump 5 that connects core holding unit 8, be provided with ring and press indicator gauge 9.
When the level pressure stable state perm-plug method appearance of application the utility model carries out the core permeability experiments of measuring, can carry out according to the following steps:
1, the dry rock core to be measured of elder generation before experiment, and accurately measure its length and diameter; Rock core to be measured is put into core holding unit 8, the two ends and the ring pressure pipeline of core holding unit 8 are tightened;
2, open ring press pump 5 then, 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 positions on the 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 first gas meter 10, second gas meter 11, the 3rd gas meter 12; Let gas pass through core holding unit 8; Observe the mobility status of float in first gas meter 10, second gas meter 11, the 3rd gas meter 12, treat the reading of gas flow in the stable back of float record first gas meter 10, second gas meter 11, the 3rd gas meter 12;
5, in digital Bubble Flow-meter 13, pack into after an amount of soap lye, open 1 pair of air drum 4 of inflator pump once more and inflate, stop after a period of time, and utilize the soap-film time that the rising certain distance needs in glass tube in the stopwatch record digital Bubble Flow-meter 13;
6, treat piston 2 in the air drum 4 fall tin at the bottom of after test again next time; 4-5 time so repeatedly; The venting ring was pressed after experiment was accomplished, and removal of core; Can after changing rock core, carry out new round experiment.
Claims (4)
1. level pressure stable state perm-plug method appearance; Press indicator gauge (9), first gas meter (10), 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 in its structure, being provided with piston (2), balancing weight (3), ring press pump (5), exsiccator (7), core holding unit (8); In air drum (4), be provided with piston (2), on piston (2), be added with balancing weight (3); The left end of core holding unit (8) is connected through the end of pipeline with exsiccator (7), and the other end of exsiccator (7) is connected through pipeline with the gas outlet of air drum (4); The air intake opening of air drum (4) is connected through pipeline with inflator pump (1); The right-hand member of core holding unit (8) is connected through pipeline with first gas meter (10), second gas meter (11), the 3rd gas meter (12) and digital Bubble Flow-meter (13); On the outer wall of core holding unit (8), be provided with ring and press the hole, the ring of core holding unit (8) presses Kong Yuhuan press pump (5) to be connected through pipeline.
2. a kind of level pressure stable state perm-plug method appearance according to claim 1 is characterized in that on piston (2), the mercury seal ring being housed, and seals through the mercury seal ring between air drum (4) and the piston (2).
3. a kind of level pressure stable state perm-plug method appearance according to claim 2 is characterized in that on the pipeline that connects exsiccator (7) and core holding unit (8), being provided with electron pressure indicator gauge (6); On the pipeline of the ring pressure Kong Yuhuan press pump (5) that connects core holding unit (8), be provided with ring and press indicator gauge (9).
4. a kind of level pressure stable state perm-plug method appearance according to claim 3 is characterized in that piston (2) is a steel body solid slug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205030077U CN202383047U (en) | 2011-12-06 | 2011-12-06 | Constant pressure steady state gas permeability measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205030077U CN202383047U (en) | 2011-12-06 | 2011-12-06 | Constant pressure steady state gas permeability measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383047U true CN202383047U (en) | 2012-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205030077U Expired - Fee Related CN202383047U (en) | 2011-12-06 | 2011-12-06 | Constant pressure steady state gas permeability measuring instrument |
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| Country | Link |
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| CN (1) | CN202383047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149137A (en) * | 2011-12-06 | 2013-06-12 | 长江大学 | Constant-pressure steady-state gas permeability measuring instrument |
-
2011
- 2011-12-06 CN CN2011205030077U patent/CN202383047U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149137A (en) * | 2011-12-06 | 2013-06-12 | 长江大学 | Constant-pressure steady-state gas permeability measuring instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20121206 |