In-situ exploitation flow-heat transfer experiment device for compact oil shale

Abstract

The invention relates to an in-situ exploitation flow-heat transfer experiment device for compact oil shale, and belongs to the technical field of experiment measuring instruments. The device comprises a flow-heat transfer core holding unit, an axial-confining pressure injection system, an axial-radial pressure stabilizing system, a temperature-strain monitoring system, a liquid cooling circulating system, a safety backflow preventing system, a flow monitoring system, a gas collection-recovery system and a control and data recording system cooperating with each other. According to the device,a thermal fluid medium with pressure is injected into a core with a fracture in the flow-heat transfer core holding unit, and axial and radial strains are observed to determine a critical temperaturepoint that the fracture in the core closes up under the condition of heat injection and critical pressure that the fracture is opened again under the pressurizing condition of the thermal fluid mediumin the later period, and thereby, closure critical parameters of the fracture during in-situ exploitation are obtained; and the permeability variation situation of the core with the rock mass fracture can be evaluated through the conditions of flow before changes and flow after changes, and thereby, reservoir fractures effectively communicate for a long term by regulating site construction parameters to facilitate heat injection and oil and gas migration in the later period.

Description

technical field

[0001] The invention belongs to the technical field of experimental measuring instruments, in particular to a seepage-heat transfer experimental device for in-situ mining of tight oil shale. Background technique

[0002] With the rapid development of the domestic economy, the energy consumption of oil and natural gas has increased significantly. At this stage, the dependence of domestic crude oil on foreign countries has increased year by year. In recent years, my country's dependence on foreign crude oil has exceeded 70%. At the same time, the exploitation of conventional energy resources such as coal, oil, and natural gas has gradually become weak. Considering the development needs of modern society, conventional energy supply has been unable to support the long-term sustainable development of industry. In recent years, unconventional energy resources such as oil shale, oil sands, coalbed methane and shale gas have huge reserves and broad prospects for exp...

Images