Coal Metamorphic Evolution Fracture System Development Simulation Test System

Abstract

The invention discloses a development simulation test system of a coal metamorphism evolution fissure system. The development simulation test system comprises a power loading system, a coal rock fissure generation simulation system and a data display system. The power loading system comprises an air pressure apparatus and a hydraulic pressure apparatus. The coal rock fissure generation simulationsystem comprises an endogenic fissure generation simulation system and an exogenous fissure generation simulation system, wherein both the endogenic fissure generation simulation system and the exogenous fissure generation simulation system are provided with a set of confining pressure apparatus. The data display system comprises a sensing device and a data display device. The development simulation test system is simple in structure and convenient in use, endogenic fissure and the exogenous fissure formation processes in a metamorphism evolution process of coal at different temperature and pressure conditions can be simulated, permeability at different temperature and pressure conditions can be tested, quantification of a fissure growth system is carried out, and guidance for an economical evaluation system of coal layer and gas, correct selection and type selection of an exploitation technique is provided.

Description

technical field [0001] The invention relates to the technical field of coal bed gas application, in particular to a coal metamorphic evolution crack system development simulation test system. Background technique [0002] Coal reservoir is a new type of clean and clean energy. From the perspective of coal mine safety and energy utilization, my country's coal departments, petroleum departments, geological and mining departments, local governments, and domestic and foreign CBM companies have successively constructed nearly 5,000 CBM wells in 42 coal-bearing areas in China (by the end of 2010). However, except for a few areas such as the southeast of Qinshui Basin in Shanxi, Tiefa in Liaoning, and Hedong Coalfield in Shanxi, which have achieved partial commercial development, the test results of CBM development in most areas are not satisfactory. [0003] Whether coalbed methane can be produced and the amount of output mainly depends on two aspects. One is whether there are en...

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Problems solved by technology

During the process of coal formation and after coal formation, coal has experienced different effects of temperature, pressure and structural stress, and the degree of deformation and metamorphism of coal rocks is different under different buried depths and different geological dynamics. Therefore, it is urgent to develop a device that can use Coal samples from different regions simulate the endogenous cracks formed by the coal metamorphism process caused by changes in temperature and pressure and the exogenous cracks caused by external forces during the coal metamorphic evolution process, in order to find out the coal under different temperatures, pressures, and tectonic movements. The degree of development of reservoir fractures is expected to provide an improved idea and means for the current coalbed methane economic evaluation system and development process technology selection; but there is currently no coal metamorphic evolution fracture system development simulation test system

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