Device and method for testing gas loss amount which simulates wireline coring process

Abstract

The present invention discloses a device and method for testing the gas loss amount which simulates a wireline coring process, and belongs to the field of petroleum engineering. The device includes: a programmable temperature control thermostat for simulating temperature changes in a wireline coring process, a simulated center pipe body for constructing a simulated environment of the center pipe body being filled with drilling fluid or clean water, a simulated coring barrel for drilling for and retaining a core sample, a gas injection control and recovery device, a liquid injection control and recovery device, and a drainage and gas collection meter. The present invention has advantages as follows: it is simple to implement and can reproduce a real drilling and coring process to a certain extent; the simulation of the coordinated changes in liquid pressure and temperature environment experienced by the core sample lifted to a wellhead from a drilling bottom hole through the programmable temperature control thermostat and a program-controlled constant pressure valve, can truly reproduce the environmental conditions of a wireline coring barrel being filled with drilling fluid and the loss changes in gas content of the core sample with the coordinated descents in liquid-phase pressure and temperature in the liquid-phase filling environment in the core lift process.