An experimental method and device for simulating the exploitation of shale gas reservoirs

Abstract

The invention provides an experimental method and device for simulating shale gas pool exploitation. The experimental method and device for simulating shale gas pool exploitation comprises the steps that a test core of a reservoir to be exploited is obtained; the test core is placed into a core holding device; ring pressure is exerted on the test core through the core holding device; the test core is heated; adsorbable gas is input into the core holding device; when a pressure value of the adsorbable gas in the core holding device is the same as a pressure value of gas in the test core in the reservoir to be exploited, the core holding device is opened so as to release the adsorbable gas in the test core; first opening time of the core holding device, a first pressure value, corresponding to the first opening time of the core holding device, in the core holding device, and first gas output amount of the core holding device are obtained. The experimental method and device for simulating shale gas pool exploitation can simulate the dynamic characteristics of shale gas during the whole exploitation period really.

Description

technical field [0001] The invention relates to the field of shale gas reservoir exploitation, in particular to an experimental method and device for simulating shale gas reservoir exploitation. Background technique [0002] With the increasing demand for energy around the world, the development of unconventional gas reservoirs is changing the world's energy pattern and becoming the focus of global exploitation. Shale gas belongs to unconventional natural gas, which mainly occurs in the surface of rock particles and organic matter in the adsorbed state, or in the pores and fractures in the free state, and a very small amount exists in the dissolved state. The pore-permeability structure of shale gas reservoirs is significantly different from that of conventional gas reservoirs. Shale gas reservoirs have the characteristics of ultra-low porosity, ultra-low permeability, and adsorption and desorption, which lead to a rapid decline in the daily gas production of shale gas in th...

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Problems solved by technology

[0003] In the prior art, the experimental method of simulating the exploitation of shale gas reservoirs on the ground is usually used to obtain the dynamic characteristics of shale gas reservoir exploitation; Considering the pressure and temperature of reservoirs and the characteristics of gas extracted from shale gas reservoirs, it is impossible to truly simulate the dynamic characteristics of shale gas in the entire production cycle, resulting in inaccurate simulation results, so that shale gas cannot be analyzed Provide guidance for formulating reasonable mining plans and efficient mining

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