CN204594829U - A kind of shale gas reservoir air content proving installation - Google Patents
A kind of shale gas reservoir air content proving installation Download PDFInfo
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- CN204594829U CN204594829U CN201520192412.XU CN201520192412U CN204594829U CN 204594829 U CN204594829 U CN 204594829U CN 201520192412 U CN201520192412 U CN 201520192412U CN 204594829 U CN204594829 U CN 204594829U
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Abstract
The utility model relates to a kind of shale gas reservoir air content proving installation, and this shale gas reservoir air content proving installation comprises high pressure nitrogen admission gear, high-pressure natural gas admission gear, the first six-way valve, supercharge pump, the second six-way valve, evacuator, constant temperature oven, rock core desorb flow model, pressure transducer, ring pressure-controlled pump and gas-metering device; High pressure nitrogen admission gear is connected with the second six-way valve after supercharge pump through the first six-way valve by pipeline with high-pressure natural gas admission gear, described evacuator is connected with the second six-way valve, second six-way valve is connected with gas-metering device after being arranged on the rock core desorb flow model in constant temperature oven by pipeline, and described rock core desorb flow model regulates the ring pressure-controlled pump of rock core desorb flow model confined pressure to be connected respectively with for pressure transducer with for following the tracks of.This device is achieved and is desorbed by physical simulating method research gas reservoir development process shale gas, determines gas production rate in shale gas recovery process.
Description
Technical field
The utility model belongs to shale gas development technique field, particularly a kind of shale gas reservoir air content proving installation.
Background technology
Current shale measurement of air content can be divided into two classes: direct method (desorption method) and indirect method (adsorption isotherm experiment method).Desorption method measures the most direct method of shale air content, utilizes on-the-spot drill cores and representative landwaste to measure actual air content, measures shale air content and comprise loss tolerance, gas desorption quantity and residual volume.Loss gas refers to that rock is mentioned ground and sealed the gas desorbed from rock during this period of time to tinning from down-hole, cannot measure, and calculates that loss tolerance is the key of Accurate Prediction shale air content; Stripping gas is that after sample tinning, natural desorb adopts buret metering; Residual gas by the method for crushed rock sample, gas desorption method is out measured.
Adsorption isotherm experiment method refers to by the method such as adsorption isotherm experiment, well logging interpretation supposition adsorbed gas content and free gas content.Adsorbed gas content by isothermal adsorption simulated experiment, sets up the relational model of adsorbed gas content and pressure, temperature; Experimentation is particle rock sample product being pulverized into particle diameter 0.1 ∽ 0.5mm, then puts into the adsorbance that gas under different pressures tested by thermostat, draws out adsorption isothermal by pressure and adsorbance, calculate adsorbed gas content according to Lan Shi model.Free tolerance is obtained by the net porosity of well logging interpretation data determination free gas and gas saturation, shale gas reservoir Free Gas net porosity is matrix porosity and fracture porosity sum of the two, utilize the well-log informations such as sound wave, neutron, density and nuclear magnetic resonance can record matrix porosity, go out comparatively accurately fracture porosity by dual laterolog material computation; Gas saturation, setting up on rock resistivity, shale-water resistivity, the basis of net porosity with stratum mixed water resistivity relation formula, utilizes Archie equation to calculate.
Utility model content
The purpose of this utility model is to provide a kind of shale gas reservoir air content proving installation, this device is used to be desorbed by physical simulating method research gas reservoir development process shale gas, determine gas production rate in shale gas recovery process, for determining the free tolerance of different existence state gas and absorption tolerance, provide data supporting.
The technical scheme that the utility model solves the problem is:
A kind of shale gas reservoir air content proving installation, comprises high pressure nitrogen admission gear, high-pressure natural gas admission gear, the first six-way valve, supercharge pump, the second six-way valve, evacuator, constant temperature oven, rock core desorb flow model, pressure transducer, ring pressure-controlled pump and gas-metering device;
Described high pressure nitrogen admission gear is connected with the second six-way valve after supercharge pump through the first six-way valve by pipeline with high-pressure natural gas admission gear, described evacuator is connected with the second six-way valve, second six-way valve is connected with gas-metering device after being arranged on the rock core desorb flow model in constant temperature oven by pipeline, and described rock core desorb flow model regulates the ring pressure-controlled pump of rock core desorb flow model confined pressure to be connected with pressure transducer with for following the tracks of respectively.
By such scheme, described rock core desorb flow model and be equipped with valve between the second six-way valve and gas-metering device.
This device principle of work and process as follows:
Adopt and obtain natural core from shale reservoir, according to geologic characteristics arrangement, filling rock core to rock core desorb flow model, add confined pressure (confined pressure is gas reservoir burden pressure) by ring pressure-controlled pump, evacuator is to system pump down; With high-pressure air source, supercharge pump to rock core pore filling high-pressure natural gas, be pressurized to reservoir pressure, under uniform temperature (25 DEG C or formation temperature), keep 24 hours pressure stabilitys.That opens rock core desorb flow model goes out valve, releases a certain amount of gas, makes system pressure reduce by 2 ∽ 6MPa, then valve-offs, measures gas production rate with gas-metering device; Meanwhile, monitoring system pressure changes, and at least stablizes 3 ∽ 8 hours, the Pressure Drop that record output gas is corresponding, then carries out the test of step-down next time, to without gas production rate, tests and terminates.Automatically monitor by gas-metering device, pressure monitoring device, gather, process data.Carry out splitting point adsorbed gas and free gas according to the isothermal adsorption rule of gas, calculate adsorption isothermal curve.
The beneficial effect that the utility model device brings is: this unit simulation gas reservoir environment and gas reservoir development scheme, gas production rate in gas reservoir production run, pressure and other parameters Changing Pattern are reproduced, achieve and desorbed by physical simulating method research gas reservoir development process shale gas, determine gas production rate in shale gas recovery process, for determining the free tolerance of different existence state gas and absorption tolerance, provide data supporting.This plant automation degree is high, data are monitored automatically, gather, process, accurately.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, shale gas reservoir air content proving installation, comprises high pressure nitrogen admission gear 1, high-pressure natural gas admission gear 2, first six-way valve 3, supercharge pump 4, evacuator 5, second six-way valve 6, constant temperature oven 7, rock core desorb flow model 8, pressure transducer 9, ring pressure-controlled pump 10 and gas-metering device 11;
High pressure nitrogen admission gear 1 is connected with the second six-way valve 6 after supercharge pump 4 through the first six-way valve 3 by pipeline with high-pressure natural gas admission gear 2, evacuator 5 is connected with the second six-way valve 6, second six-way valve 6 is connected with gas-metering device 11 after being arranged on the rock core desorb flow model 8 in constant temperature oven 7 by pipeline, and rock core desorb flow model 8 regulates the ring pressure-controlled pump 10 of rock core desorb flow model confined pressure to be connected with pressure transducer 9 with for following the tracks of respectively.
High pressure nitrogen, rock gas are provided by high-pressure air source, and maximum pressure 12 MPa, is pressurized to reservoir pressure by supercharge pump by low-pressure gas, and maximum output pressure can reach 50 MPa, provide sufficient gaseous tension to rock core desorb flow model;
Rock core desorb flow model, can load diameter 2.5cm rock core, maximum rock core pattern length 30cm, pressure 50 MPa, and ring pressure-controlled pump is followed the tracks of and regulated confined pressure simultaneously, and parcel rock core is non-leakage, maximum pressure 70 MPa;
Evacuator is found time to the part will filling rock gas, ensures that rock core desorb flow model and pipeline are by the filling of pure natural gas, pressure limit-0.1 to 0 MPa, measuring accuracy 0.02 MPa;
Pressure monitoring is used for test model system not pressure in the same time, pressure limit 0 to 50 MPa, measuring accuracy 0.01 MPa;
Constant temperature oven is used for Controlling model simulated formation temperature, temperature range: room temperature to 100 DEG C, accuracy of temperature control 0.5 DEG C;
Gas controlling device is used for volume when testing producing goes out gas 25 DEG C, flow range 0 to 1000 ml, precision 0.1ml.
This device principle of work and process as follows:
Adopt and obtain natural core from shale reservoir, according to geologic characteristics arrangement, filling rock core to rock core desorb flow model, confined pressure (confined pressure is gas reservoir burden pressure) is added by ring pressure-controlled pump, evacuator is to system pump down, saturated natural gas, with high-pressure air source, supercharge pump to rock core pore filling high-pressure natural gas, be pressurized to reservoir pressure, under uniform temperature (25 DEG C or formation temperature), keep 24 hours pressure stabilitys.Change out valve, release a certain amount of gas, make system pressure reduce by 2 to 6MPa, then valve-off, measure gas production rate with gas-metering device; Meanwhile, monitoring system pressure changes, and at least stablizes 3 to 8 hours, the Pressure Drop that record output gas is corresponding, then carries out the test of step-down next time, to without gas production rate, tests and terminates.Automatically monitor by gas-metering device, pressure monitoring device, gather, process data.Carry out splitting point adsorbed gas and free gas according to the isothermal adsorption rule of gas, calculate adsorption isothermal curve.
Claims (5)
1. a shale gas reservoir air content proving installation, it is characterized in that, comprise high pressure nitrogen admission gear, high-pressure natural gas admission gear, the first six-way valve, supercharge pump, the second six-way valve, evacuator, constant temperature oven, rock core desorb flow model, pressure transducer, ring pressure-controlled pump and gas-metering device;
Described high pressure nitrogen admission gear is connected with the second six-way valve after supercharge pump through the first six-way valve by pipeline with high-pressure natural gas admission gear, described evacuator is connected with the second six-way valve, second six-way valve is connected with gas-metering device after being arranged on the rock core desorb flow model in constant temperature oven by pipeline, and described rock core desorb flow model regulates the ring pressure-controlled pump of rock core desorb flow model confined pressure to be connected with pressure transducer with for following the tracks of respectively.
2. proving installation according to claim 1, is characterized in that, described rock core desorb flow model and be equipped with valve between the second six-way valve and gas-metering device.
3. proving installation according to claim 1, is characterized in that, described constant temperature oven accuracy of temperature control is 0.5 DEG C.
4. proving installation according to claim 1, is characterized in that, pressure transducer pressure monitoring pressure limit is 0 to 50 MPa, and measuring accuracy is 0.01 MPa.
5. proving installation according to claim 1, is characterized in that, described evacuator is that pressure limit-0.1 is to 0 MPa and precision is the evacuator of 0.02 MPa.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713802A (en) * | 2015-04-01 | 2015-06-17 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Method and device for testing gas content of shale gas reservoir |
| CN105606703A (en) * | 2016-01-28 | 2016-05-25 | 中国石油大学(华东) | Calculating method and measuring device for shale adsorption gas and free gas |
| CN106442938A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Device used in surveying calculation method for accurately acquiring shale gas content |
| CN106970002A (en) * | 2017-04-29 | 2017-07-21 | 贵州大学 | A kind of rock sample desorption chamber |
| CN108469396A (en) * | 2018-02-07 | 2018-08-31 | 中国石油天然气股份有限公司 | Gas content physical simulation device and method for coal rock and shale |
| CN110608975A (en) * | 2019-09-23 | 2019-12-24 | 中国地质大学（武汉） | Gas content testing device and testing method and application thereof |
| CN113670769A (en) * | 2021-08-18 | 2021-11-19 | 中国石油大学(北京) | Method for simulating gas content change in marine shale stratum lifting process |
-
2015
- 2015-04-01 CN CN201520192412.XU patent/CN204594829U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713802A (en) * | 2015-04-01 | 2015-06-17 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Method and device for testing gas content of shale gas reservoir |
| CN104713802B (en) * | 2015-04-01 | 2018-12-04 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | A kind of shale gas reservoir gassiness weight testing method |
| CN105606703A (en) * | 2016-01-28 | 2016-05-25 | 中国石油大学(华东) | Calculating method and measuring device for shale adsorption gas and free gas |
| CN105606703B (en) * | 2016-01-28 | 2018-07-31 | 中国石油大学(华东) | The computational methods and its measuring device of shale adsorbed gas and free gas |
| CN106442938A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Device used in surveying calculation method for accurately acquiring shale gas content |
| CN106970002A (en) * | 2017-04-29 | 2017-07-21 | 贵州大学 | A kind of rock sample desorption chamber |
| CN108469396A (en) * | 2018-02-07 | 2018-08-31 | 中国石油天然气股份有限公司 | Gas content physical simulation device and method for coal rock and shale |
| CN110608975A (en) * | 2019-09-23 | 2019-12-24 | 中国地质大学（武汉） | Gas content testing device and testing method and application thereof |
| CN113670769A (en) * | 2021-08-18 | 2021-11-19 | 中国石油大学(北京) | Method for simulating gas content change in marine shale stratum lifting process |
| CN113670769B (en) * | 2021-08-18 | 2022-10-18 | 中国石油大学(北京) | Method for simulating gas content change in marine shale stratum lifting process |
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Effective date of registration: 20191227 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: Exploration and Development Research Institute of SINOPEC Jianghan Oilfield Branch Company Patentee after: China Petrochemical Co., Ltd. Address before: 430223, No. 18, Garden Road, East Lake hi tech Zone, Hubei, Wuhan Patentee before: Exploration and Development Research Institute of SINOPEC Jianghan Oilfield Branch Company |