COALBED METHANE HORIZONTAL WELL HOLE COLLAPSE PRESSURE RELIEF MINING SIMULATION TEST SYSTEM

摘要

A coalbed methane horizontal well hole collapse pressure relief mining simulation test system. A coal reservoir is constructed by means of reconstruction of a coal measure strata structure and simulation of a similar material simulation subsystem; a pressure pulsation excitation pressure relief simulation subsystem achieves horizontal well pressure pulsation excitation and stress release, a coal-liquid-gas mixture is displaced hydraulically to be migrated to a straight well section; an electric simulation subsystem achieves detection of electric field distribution in similar materials, a product separation and detection subsystem separates and weighs coal, liquid and gas, and a data acquisition and control subsystem detects and controls the operation and implementation processes of equipment in real time. The system can achieve the simulation of soft-structured coal reservoir horizontal well hole collapse and stress release, simulate migration features of a gas phase, a liquid phase and a solid phase in a pressure relief space, simulate the separation process of the produced mixture, and obtain the law between coal reservoir pressure relief and gas desorption change and the dynamic law between a complex seepage field after coal measure strata excitation and pressure relief and horizontal well section flow.