PHYSICAL SIMULATION EXPERIMENTAL DEVICE AND METHOD FOR WATER INVASION AND DRAINAGE GAS RECOVERY IN GAS RESERVOIRS

摘要

The invention provides a physical simulation experimental device and methodforwater invasion and drainage gas recovery in gas reservoir, and theexperimental deviceincludes: a heterogeneous reservoir model having a first core holder and asecond coreholder, wherein an inlet end of the first core holder is connected to an inletend of thesecond core holder by an inlet pipeline, an outlet end of the first coreholder is connectedto an outlet end of the second core holder by an outlet pipeline, a third coreholder isconnected between a middle portion of the first core holder and a middleportion of thesecond core holder, and a fourth core holder is connected to the outletpipeline; a gasinjection mechanism having a gas injection bottle and a gas injectioncylinder, the gasinjection cylinder being connected to the inlet pipeline; a water bodysimulation mechanismhaving a water storage tank and a water injection pump, the water storage tankbeingconnected to the inlet pipeline. The invention can continuously perform thephysicalsimulation experiment for water invasion and drainage gas recovery in gasreservoir,simulate and reveal different drainage gas recovery modes, timings, scales andtheirinfluences on the recovery ratio of the gas reservoir.