Radial flow simulation system for geological reservoir

Abstract

The invention provides a radial flow simulation system for a geological reservoir. The radial flow simulation system comprises a radial simulation cavity provided with a cylindrical cavity, a hollow simulation wellbore, a capsule-type overlaying pressure loading sleeve, a steady-pressure liquid and gas supply unit, a metering device, a parameter measuring system and a data collecting processing unit; the hollow simulation wellbore is used for simulating an exploited well and inserted into the cylindrical cavity; the capsule-type overlaying pressure loading sleeve is used for simulating the stratum overlaying pressure applied to a porous medium; the steady-pressure liquid and gas supply unit is used for injecting gas and liquid into the cylindrical cavity; the metering device is used for being connected with the wellbore so as to receive and meter discharged hydrate; the parameter measuring system is used for measuring data of the porous medium in different simulation experiments; and the data collecting processing unit is used for collecting and analyzing data and outputting a result in different experiment processes while the experiment processes are controlled. According to the radial flow simulation system, the gas and the liquid are injected quantitatively according to the proportion to form the hydrate, thus the synthesis process of the hydrate under a stratum can be simulated, decomposition of the hydrate is simulated through depressurizing or temperature rising, and the sand layer displacement situation after the hydrate is mined under the overlaying pressure condition is simulated by applying the certain overlaying pressure on a sand layer after hydrate decomposition.

Description

technical field [0001] The invention relates to the geological field, in particular to a radial seepage model system for simulating formation overburden after formation hydrate is decomposed. Background technique [0002] Since this century, the whole world has recognized that natural gas hydrate is a clean energy alternative to conventional fossil fuels. More than 200 hydrate deposits have been discovered in the world. Based on the current energy consumption trend, only 15% of hydrate mining can be used globally for 200 years. However, the stable temperature and pressure conditions formed by itself determine the particularity of its mining method. In addition, the impact of its mining process on the environment needs further evaluation. Therefore, most of the current research on hydrate mining is still in the stage of laboratory physical simulation and numerical simulation, except for the trial production of a single well or a single well group in a few countries and regio...

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Problems solved by technology

However, there is currently a lack of a simulation experimental device capable of comprehensively processing this set of natural gas hydrate development in the field of research and development, so as to study the mechanism of synthesis and decomposition of natural gas hydrate in the drilling cores of my country's land permafrost areas, and to master the land area hydrate experiment. During the production process, under different development methods and different development well group conditions, the reservoir physical properties, temperature, pressure, production change rules and other important sensitive parameters that affect the test production provide physical simulation support

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