CN104749321A - Shale gas desorption pressure tester - Google Patents
Shale gas desorption pressure tester Download PDFInfo
- Publication number
- CN104749321A CN104749321A CN201510029870.6A CN201510029870A CN104749321A CN 104749321 A CN104749321 A CN 104749321A CN 201510029870 A CN201510029870 A CN 201510029870A CN 104749321 A CN104749321 A CN 104749321A
- Authority
- CN
- China
- Prior art keywords
- pressure
- shale gas
- shale
- cylinder body
- upper cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a shale gas desorption pressure tester. The tester mainly comprises a cylinder body, a base, an upper cover, a high-pressure micropump and a pressure sensor, wherein a glass observing window is arranged on the cylinder body; the pressure sensor is installed on the upper cover; a liquid inlet is formed in the central position of the upper cover; the upper cover is connected with the high-pressure micropump. Saturated brine with temperature consistent with the formation temperature is continuously added to the cylinder body in which shale cores are put and the value of pressure in the cylinder body immediately rises, linear bubbles generated in quantity because of desorption escape of adsorbed shale gases adsorbed on the surface of shale and in micropores can be observed from the observing window, when the linear bubbles begin reducing, the corresponding pressure value is the initial shale gas desorption pressure, and when the linear bubbles begin reducing in quantity, the corresponding pressure value is the main shale gas desorption pressure. The shale gas desorption pressure tester has the beneficial effects that adopting the direct measurement mode, compared with the prior art, the tester is more reliable and accurate in data, also has the effect of greatly shortening the experimental determination time and provides powerful guarantees for shortening the project period and ensuring the technology and economical efficiency of exploitation.
Description
Technical field
The present invention relates to a kind of shale gas desorption pressures tester.
Background technology
Shale gas refers to the rock gas in the organic mud shale of richness and interlayer, and the shale gas exploited from shale, based on free state and ADSORPTION STATE, approximately respectively accounts for 50%, only has minute quantity to be stored in kerogen, bituminous matter and oil with solubilised state.Different from conventional gas and oil, shale gas does not form trap, needs horizontal well and extensive waterfrac treatment just can carry out the economic exploitation, in recovery process, after shale is pressed off by waterfrac treatment, first free state shale gas can overflow, then, along with the reduction of frac pressure, the ADSORPTION STATE shale gas be adsorbed in shale surface and interlayer starts desorb, and enters gas production passage, therefore, desorption pressures calculates and tests in shale gas exploitation very important, directly affects technique and the economy of shale gas exploitation.
At present, both at home and abroad the mensuration of shale gas desorption pressures is generally carried out in the lab, by adsorption isotherm experiment curve determination shale gas critical desorption pressures, then calculate shale gas desorption pressures in conjunction with the air content of actual measurement, but there is following problem in this experimental determining method:
1) accuracy
Generally to enter at shale core laboratory just can obtain desorption pressures result of calculation after 2 months, extend construction period, affect project progress.
2) effective
Shale gas adsorption isotherm experiment is according under certain container pressure, in container, the nitrogen adsorption amount on slate flour surface calculates, experimentation is in fact adsorption process, but not desorption process, therefore, oppositely calculate that the experimental principle of critical desorption pressures value inherently lacks reliability, accuracy with adsorption isotherm experiment, and it is just more inaccurate to be combined by Critical desorption pressure the desorption pressure value calculated with air content data.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of shale gas desorption pressures tester, direct experiment mode is adopted to measure shale gas desorption pressures, instead of the indirect calculation mode that prior art generally adopts, easy and simple to handle, measure efficiency high, data measured is accurate, solve the cycle that shale gas adsorption isotherm experiment exists long, the technical matters such as efficiency is low, data are inaccurate, for engineering is implemented to provide powerful guarantee smoothly.
The present invention is with when shale core is immersed in saturated brine, the ADSORPTION STATE shale gas be adsorbed in shale surface and micropore can overflow this phenomenon for foundation with the form desorb of wire bubble, realize by the following technical solutions: a kind of shale gas desorption pressures tester, form primarily of cylinder body, base, upper cover, high pressure micro pump, pressure transducer, cylinder body is provided with glass window mouth, pressure transducer is arranged on and covers, upper cover center is provided with inlet, and is connected with high pressure micro pump.
Beneficial effect of the present invention is: 1) change former adsorption isotherm experiment from principle and oppositely calculate shale gas critical desorption pressures by adsorption isotherm experiment curve, combine the process of actual measurement air content indirect calculation shale gas desorption pressures again, directly to measure replacement indirect calculation, make data more reliable, accurate; 2) substantially reducing the measuring time of shale gas desorption pressures, in 1 ~ 2 hour, just can obtain the shale gas desorption pressures data of shale core, for shortening construction period, guaranteeing that the technique of exploitation and economy provide powerful guarantee.
Accompanying drawing explanation
Accompanying drawing of the present invention is described as follows:
Fig. 1 is structural representation of the present invention.
1 inlet; 2 upper covers; 3 cylinder bodies; 4 watch windows; 5 bases; 6 high pressure micro pumps; 7 pressure transducers.
Embodiment
The saturated brine consistent with formation temperature is added in cylinder body 3, and shale core is inserted in cylinder body 3, after tightening upper cover 2, can be observed a large amount of wire bubbles produced because the ADSORPTION STATE shale gas desorb be adsorbed in shale surface and micropore is overflowed from glass window mouth 4, the reading of pressure transducer 7 is cylinder interior pressure; Now start high pressure micro pump 6, in cylinder body 3, identical saturated brine is injected with certain flow by inlet 1, force value in cylinder body 3 raises immediately, when rising to certain value, find that the wire bubble on shale core surface starts to reduce gradually by watch window 4, then now the registration of pressure transducer 7 is the initial desorption pressures of shale gas; Along with saturated brine continues to inject, in cylinder body 3, pressure continues to increase, and when being found that by glass window mouth 4 the wire bubble on shale core surface starts a large amount of minimizing, then now the reading of pressure transducer 7 is shale gas primary desorption pressure.
Claims (3)
1. a shale gas desorption pressures tester, it is characterized in that: form primarily of cylinder body (3), base (5), upper cover (2), high pressure micro pump (6) and pressure transducer (7), cylinder body (3) is provided with watch window (4), pressure transducer (7) is arranged on upper cover (2), upper cover (2) center is provided with inlet (1), is connected with high pressure micro pump (6).
2. shale gas desorption pressures tester as claimed in claim 1, is characterized in that: described observation window (4) is inlaid with glass.
3. shale gas desorption pressures tester as claimed in claim 1, is characterized in that: described upper cover (2) is tightened by screw thread and O-ring seal and cylinder body (3), sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510029870.6A CN104749321A (en) | 2015-01-21 | 2015-01-21 | Shale gas desorption pressure tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510029870.6A CN104749321A (en) | 2015-01-21 | 2015-01-21 | Shale gas desorption pressure tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104749321A true CN104749321A (en) | 2015-07-01 |
Family
ID=53589315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510029870.6A Pending CN104749321A (en) | 2015-01-21 | 2015-01-21 | Shale gas desorption pressure tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104749321A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568675A (en) * | 2016-10-17 | 2017-04-19 | 铜仁中能天然气有限公司 | Novel desorption pressure tester for shale gas |
| CN107014717A (en) * | 2017-03-29 | 2017-08-04 | 铜仁中能天然气有限公司 | The method of testing and its device of gas gas desorption quantity are lost in a kind of shale gas well |
| CN108663285A (en) * | 2018-05-14 | 2018-10-16 | 铜仁中能天然气有限公司 | For the novel shale gas site desorption experimental rig in normal pressure stratum and test method |
| CN108663498A (en) * | 2017-03-27 | 2018-10-16 | 中国石油化工股份有限公司 | The shale gas site desorption experimental provision and method of high temperature decompression and pressure break |
| CN108896509A (en) * | 2018-07-30 | 2018-11-27 | 中国华能集团有限公司 | In-site measurement collects shale gas desorption quantity and the integrated experimental system of component analysis |
| CN110320130A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Observe the device and method of shale core gas happening law |
| CN111948092A (en) * | 2020-07-08 | 2020-11-17 | 长江大学 | Shale reservoir gas content testing device and method |
| CN112595626A (en) * | 2020-11-25 | 2021-04-02 | 王云帅 | Shale gas critical desorption pressure testing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009018999A2 (en) * | 2007-08-08 | 2009-02-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Material transport and event monitoring in systems featuring piezoelectrically activated emission of droplets, and possible combinations of a matrix and material to be metered |
| CN101387594A (en) * | 2008-09-12 | 2009-03-18 | 煤炭科学研究总院西安研究院 | Coalbed gas high pressure desorption instrument |
| CN101743377A (en) * | 2007-07-19 | 2010-06-16 | 普拉德研究及开发股份有限公司 | In situ determination of critical desorption pressures |
| WO2011007280A2 (en) * | 2009-07-13 | 2011-01-20 | Koninklijke Philips Electronics N.V. | Measuring molecular contamination in vacuum environments |
| CN102162785A (en) * | 2011-01-11 | 2011-08-24 | 中国石油天然气股份有限公司 | High-temperature high-pressure adsorption tester |
| CN204101357U (en) * | 2014-08-12 | 2015-01-14 | 中国石油化工股份有限公司 | Heating desorption tank |
-
2015
- 2015-01-21 CN CN201510029870.6A patent/CN104749321A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743377A (en) * | 2007-07-19 | 2010-06-16 | 普拉德研究及开发股份有限公司 | In situ determination of critical desorption pressures |
| WO2009018999A2 (en) * | 2007-08-08 | 2009-02-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Material transport and event monitoring in systems featuring piezoelectrically activated emission of droplets, and possible combinations of a matrix and material to be metered |
| CN101387594A (en) * | 2008-09-12 | 2009-03-18 | 煤炭科学研究总院西安研究院 | Coalbed gas high pressure desorption instrument |
| WO2011007280A2 (en) * | 2009-07-13 | 2011-01-20 | Koninklijke Philips Electronics N.V. | Measuring molecular contamination in vacuum environments |
| CN102162785A (en) * | 2011-01-11 | 2011-08-24 | 中国石油天然气股份有限公司 | High-temperature high-pressure adsorption tester |
| CN204101357U (en) * | 2014-08-12 | 2015-01-14 | 中国石油化工股份有限公司 | Heating desorption tank |
Non-Patent Citations (3)
| Title |
|---|
| 中华人民共和国煤炭工业部: "《中华人民共和国煤炭行业标准MT/T77-94》", 1 July 1994 * |
| 景兴鹏 等: "致密砂岩气含量试验测试技术", 《西 安 科 技 大 学 学 报》 * |
| 薛晓辉 等: "常规取心过程中页岩含气量解吸测定分析及建议", 《2013年煤层气学术研讨会论文集》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568675A (en) * | 2016-10-17 | 2017-04-19 | 铜仁中能天然气有限公司 | Novel desorption pressure tester for shale gas |
| CN108663498A (en) * | 2017-03-27 | 2018-10-16 | 中国石油化工股份有限公司 | The shale gas site desorption experimental provision and method of high temperature decompression and pressure break |
| CN107014717A (en) * | 2017-03-29 | 2017-08-04 | 铜仁中能天然气有限公司 | The method of testing and its device of gas gas desorption quantity are lost in a kind of shale gas well |
| CN107014717B (en) * | 2017-03-29 | 2024-04-12 | 上海瑞达峰致能源科技股份有限公司 | Method and device for testing desorption gas amount of lost gas in shale gas well |
| CN110320130A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Observe the device and method of shale core gas happening law |
| CN110320130B (en) * | 2018-03-30 | 2022-02-22 | 中国石油化工股份有限公司 | Device and method for observing gas production rule of shale core |
| CN108663285A (en) * | 2018-05-14 | 2018-10-16 | 铜仁中能天然气有限公司 | For the novel shale gas site desorption experimental rig in normal pressure stratum and test method |
| CN108896509A (en) * | 2018-07-30 | 2018-11-27 | 中国华能集团有限公司 | In-site measurement collects shale gas desorption quantity and the integrated experimental system of component analysis |
| CN111948092A (en) * | 2020-07-08 | 2020-11-17 | 长江大学 | Shale reservoir gas content testing device and method |
| CN112595626A (en) * | 2020-11-25 | 2021-04-02 | 王云帅 | Shale gas critical desorption pressure testing device |
| CN112595626B (en) * | 2020-11-25 | 2022-12-13 | 陕西圣和源实业有限公司 | Shale gas critical desorption pressure testing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104749321A (en) | Shale gas desorption pressure tester | |
| CN105221122B (en) | Simulate the visual experimental apparatus and method of fractured-cavernous carbonate reservoir gas injection | |
| WO2016061854A1 (en) | Simulation experiment device for natural gas hydrate exploitation at permeable boundary layers | |
| CN104265281B (en) | Method for predicting well yield of sealed, unsaturated oil reservoirs through elastic driving water-flooding extraction | |
| CN204827440U (en) | Simulation crack oil reservoir gel particle evaluation experimental apparatus | |
| CN106908579A (en) | One kind research highly mineralized formation brines is to CO2Drive the experimental provision of influence | |
| CN103776979A (en) | Simulation test method and device for inhibiting methane desorption effect by coal seam water injection | |
| CN102323196A (en) | Design manufacturing and application of triaxial penetration tester | |
| CN104297069A (en) | Gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method | |
| CN103940715B (en) | The natural percolation ability analogue experiment method of rock | |
| CN103925950A (en) | Multifunctional gas parameter measuring device and using method thereof | |
| CN103792334A (en) | Method for predicting width of fracture-vug type carbonate rock acid etching wormhole | |
| CN102654046B (en) | Top air-injection gravity auxiliary driving oil-extraction two-dimensional physical simulation experiment system | |
| CN106568675A (en) | Novel desorption pressure tester for shale gas | |
| CN111487172A (en) | Device and method for evaluating flow conductivity of acid-etched fracture of tight reservoir core | |
| CN105547848A (en) | Mixed core testing chamber and mud rock breakthrough pressure testing device | |
| CN108225998B (en) | Acidizing production increase simulation experiment method for rock core stratum with diameter of 7cm under warm pressing | |
| CN104200105A (en) | Method for determining filling property lower limit of tight sandstone gas | |
| MX361796B (en) | Downhole fluid analysis methods for determining viscosity. | |
| CN103912700B (en) | A kind of high pressure high temperature experiment back-pressure valve | |
| CN105424545B (en) | Method and device for measuring gas content of natural gas hydrate sediment | |
| CN204631012U (en) | The corrosion simulated laboratory testing rig of a kind of oil field multifunctional | |
| CN104405350B (en) | A kind of horizontal well chemical profile control method | |
| CN103558357A (en) | Experiment device for detecting influence of moisture on methane desorption rule | |
| CN112304842B (en) | Shale oil CO2/N2Alternating displacement injection quantity simulation analysis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |