an analog co 2 Method of dynamic process of displacement and displacement of shale gas

A dynamic process, CO2 technology, applied in the direction of material inspection products, soil material testing, etc., can solve the problems of difficult real-time monitoring of the experimental process, limited measurement devices, etc., and achieve the effect of reducing test errors and errors.

Active Publication Date: 2017-12-08
CHINA HUANENG GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

Current Research CO 2 The methods of displacement and replacement are mostly for coal seams, less for shale; secondly, regarding CO 2 Most of the devices for displacement and replacement of shale gas are limited by the measurement devices, and it is difficult to monitor the progress of the experiment in real time
Therefore, the calculation results of the research data have a certain lag in the experimental process, and it is impossible to quantitatively evaluate the replacement effect in real time.

Method used

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  • an analog co <sub>2</sub> Method of dynamic process of displacement and displacement of shale gas

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Embodiment Construction

[0041] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0042] The present invention simulates CO 2 The principle of the dynamic process method of displacement and replacement of shale gas is as follows:

[0043] First place the shale powder sample in the sand filling pipe, set the initial state of the sample specimen (including temperature and pressure) according to the actual formation conditions; check the air tightness of the device; use the calibration system to calibrate the pipeline volume with standard blocks ; Turn on the vacuum pump to evacuate the device, operate the back pressure control system to set the back pressure; turn on CH 4 Gas booster pump and power drive system, the CH 4 The gas is injected into the sand filling pipe system, fully adsorbed under simulated formation conditions, and the volume cumulative flow at the inlet end of the sand packing pipe is recorded; 2 The gas boo...

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Abstract

The invention provides a method for simulating the dynamic process for displacing and replacing shale gas through CO2. Based on a corresponding simulation device, the method mainly comprises the steps that a shale powdered sample is placed in a sample chamber of a sand-filled pipe, and the initial state of the sample is set according to the practical stratum condition; after a pipe volume is calibrated, an appropriate amount of CH4 is introduced, an experiment for displacing and replacing the shale gas through CO2 is conducted, experimental data is measured according to a volumetric flow meter at the inlet end, a volumetric flow meter at the outlet end and an infrared-ray gas analyzer, and the displacing and replacing effect can be evaluated through calculation. According to the method for simulating the dynamic process for displacing and replacing the shale gas through CO2, the action effect of the displacing and replacing effect can be monitored in real time, and an influence rule of factors such as temperature, pressure and injection displacement capacity on the dynamic process for displacing and replacing CH4 through CO2 is obtained.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development engineering, in particular to a simulated CO 2 A method for the dynamic process of displacement of shale gas. Background technique [0002] With the deepening of the exploration and development of shale gas resources, the relevant hydraulic fracturing technology has gradually matured. At the same time, the technology consumes a lot of water resources and can cause pollution to the formation. It has also attracted people's attention. CO 2 As a new technology for developing shale gas, displacement and replacement of shale gas is one of the hot research topics at home and abroad. Current Research CO 2 The methods of displacement and replacement are mostly for coal seams, less for shale; secondly, regarding CO 2 Most of the devices for displacement and replacement of shale gas are limited by the measurement devices, and it is difficult to monitor the progress of the experimen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 张健张国祥王金意
Owner CHINA HUANENG GRP CO LTD
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