CN205015254U - Ultralow permeability measuring apparatu - Google Patents
Ultralow permeability measuring apparatu Download PDFInfo
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- CN205015254U CN205015254U CN201520655941.9U CN201520655941U CN205015254U CN 205015254 U CN205015254 U CN 205015254U CN 201520655941 U CN201520655941 U CN 201520655941U CN 205015254 U CN205015254 U CN 205015254U
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Abstract
The utility model discloses an ultralow permeability measuring apparatu, the box is located on the base, manual valve and manometer and relief pressure valve all set up on the front of box, the manual pump is fixed on the base, the rock core holder is installed on the base, the gas circuit connects the side that sets up at the box. The utility model discloses utilize pulse damped method gas permeability's definition and correlation formula, thereby obtain a result through measurement and calculation to core upstream and downstream gas pressure. Can exert three axial confined pressures to the shale sample, pressure range is 0 -70MPa, can detect the lower bound with the permeability and extend to 10 -6mD to can obtain the permeability value of rock specimen under different confined pressure conditions, permeability measuring pore pressure reaches 14MPa, is higher than ordinary permeability measuring apparatu to the permeability value that the measurable quantity is lower, pore pressure improves the back makes the difficult control of business turn over air current, through the control mode who uses " relief pressure valve - stop valve - metering valve " combination, realizes the accurate of business turn over air current and adjusts.
Description
Technical field
The utility model relates to measuring instrument field, especially a kind of ultralow permeability measuring instrument.
Background technology
Rock gas permeability measures general employing nitrogen or helium in the world, the pore pressure scope measured is generally within 200psi, low cover to be press-fitted put general at about 450psi, height covers to be press-fitted to be put and can reach 10000psi, and permeability survey scope is generally at 0.01mD to 100mD.Due to traditional penetration rate measuring instrument for be conventional rock sample, its permeability range generally in the measurement range of instrument, so can better result be obtained.And the permeability of shale samples is through being everlasting below 0.01mD, traditional measurement instrument cannot provide accurate results.
Utility model content
For the problems referred to above, the utility model aims to provide and a kind ofly covers the ultralow permeability measuring instrument that pressure scope brings up to 70MPa.
For realizing this technical purpose, scheme of the present utility model is:
A kind of ultralow permeability measuring instrument, comprise casing, hand valve, manual pump, core holding unit, tensimeter, gas path joint, reduction valve and base, described casing is seated on base, described hand valve and tensimeter and reduction valve are all arranged on the front of casing, described manual pump is fixed on base, described core holding unit is arranged on base, and described gas path joint is arranged on the side of casing.
As preferably, described core holding unit is triaxial core holder.
The utility model utilizes definition and the correlation formula of pulse attenuation method gas permeability, by obtaining a result to the measurements and calculations of core upstream and downstream gaseous tension.Three axial confined pressures can be applied to shale samples, pressure limit 0-70MPa, permeability detect and track can be extended to 10
-6mD, thus the permeability value of rock sample under different confined pressure condition can be obtained; The pore pressure of permeability survey reaches 14MPa, higher than common permeable rate measuring instrument, thus can measure lower permeability value; Pore pressure makes the more difficult control of turnover air-flow after improving, and by the control mode using " reduction valve-stop valve-metering valve " to combine, realizes the fine adjustment of turnover air-flow; Instrument uses pneumatic type autovalve to control gas circuit, uses the pressure transducer of different range, differential pressure pickup measured pressure value, make Systematical control and data acquisition accurately convenient; By supporting upper computer software and automatic measuring and controlling parts, the automatic measurement of porosity and permeability can be realized, namely control whole permeability experiment measuring processes by computing machine; Test rear software and automatically can generate experimental result curve map and form, conveniently carry out interpretation of result.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is circuit system schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
As shown in Figure 1-2, a kind of ultralow permeability measuring instrument of the utility model embodiment, comprise casing 1, hand valve 2, manual pump 3, core holding unit 4, tensimeter 5, gas path joint 6, reduction valve 7 and base 8, described casing 1 is seated on base 8, described hand valve 2 and tensimeter 5 and reduction valve 7 are all arranged on the front of casing 1, described manual pump 3 is fixed on base 8, and described core holding unit 4 is arranged on base 8, and described gas path joint 6 is arranged on the side of casing 1.
As preferably, described core holding unit 4 is triaxial core holder.
Principle of work of the present utility model: the definition and the correlation formula that utilize pulse attenuation method gas permeability, by obtaining a result to the measurements and calculations of core upstream and downstream gaseous tension.Three axial confined pressures can be applied to shale samples, pressure limit 0-70MPa, permeability detect and track can be extended to 10
-6mD, thus the permeability value of rock sample under different confined pressure condition can be obtained; The pore pressure of permeability survey reaches 14MPa, higher than common permeable rate measuring instrument, thus can measure lower permeability value; Pore pressure makes the more difficult control of turnover air-flow after improving, and by the control mode using " reduction valve-stop valve-metering valve " to combine, realizes the fine adjustment of turnover air-flow; Instrument uses pneumatic type autovalve to control gas circuit, uses the pressure transducer of different range, differential pressure pickup measured pressure value, make Systematical control and data acquisition accurately convenient; By supporting upper computer software and automatic measuring and controlling parts, the automatic measurement of porosity and permeability can be realized, namely control whole permeability experiment measuring processes by computing machine; Test rear software and automatically can generate experimental result curve map and form, conveniently carry out interpretation of result.
The above; be only preferred embodiment of the present utility model; not in order to limit the utility model, every above embodiment is done according to technical spirit of the present utility model any trickle amendment, equivalently replace and improve, within the protection domain that all should be included in technical solutions of the utility model.
Claims (2)
1. a ultralow permeability measuring instrument, it is characterized in that: comprise casing, hand valve, manual pump, core holding unit, tensimeter, gas path joint, reduction valve and base, described casing is seated on base, described hand valve and tensimeter and reduction valve are all arranged on the front of casing, described manual pump is fixed on base, described core holding unit is arranged on base, and described gas path joint is arranged on the side of casing.
2. a kind of ultralow permeability measuring instrument according to claim 1, is characterized in that: described core holding unit is triaxial core holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520655941.9U CN205015254U (en) | 2015-08-28 | 2015-08-28 | Ultralow permeability measuring apparatu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520655941.9U CN205015254U (en) | 2015-08-28 | 2015-08-28 | Ultralow permeability measuring apparatu |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205015254U true CN205015254U (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201520655941.9U Active CN205015254U (en) | 2015-08-28 | 2015-08-28 | Ultralow permeability measuring apparatu |
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| CN (1) | CN205015254U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814018A (en) * | 2017-01-18 | 2017-06-09 | 西南石油大学 | A kind of tight rock gas phase relative permeability measurement apparatus and method |
| CN109975169A (en) * | 2017-12-28 | 2019-07-05 | 核工业北京地质研究院 | A kind of country rock gas permeability coefficient test method |
-
2015
- 2015-08-28 CN CN201520655941.9U patent/CN205015254U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814018A (en) * | 2017-01-18 | 2017-06-09 | 西南石油大学 | A kind of tight rock gas phase relative permeability measurement apparatus and method |
| CN109975169A (en) * | 2017-12-28 | 2019-07-05 | 核工业北京地质研究院 | A kind of country rock gas permeability coefficient test method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |