A simulation device for fluid fracture seepage under high temperature stress

Abstract

The invention provides a fluid fissure seepage simulating device under high-temperature stress. The device comprises an injection system, a pressure control system, a high-temperature rock core holderand a temperature control system, wherein the model system is a high-temperature model capable of applying an annular pressure. The primary member is the high-temperature rock core holder which comprises a rock core chamber, anti-seepage partition plates are mounted at two ends of the inlet-outlet of the rock core chamber, and the upper portions of the anti-seepage partition plates at the inlet-outlet and a copper barrel are separately sealed through injecting plugs and yielding plugs. The copper barrel is a barrel, a pressure cavity is arranged on the outer side of the barrel and is connected to a temperature measurer and a pressure measurer, the high-temperature holder is externally connected to an annular pressure pump, and a pressure transmitter and an emptying valve are externally connected to two sides of the outside of the annular pressure pump, separately. The device provided by the invention achieves fissure seepage physical simulation of a fluid at different temperatures anddifferent stresses to achieve dynamic change characteristic analysis of an evolution process of the fissures in a dry and hot rock reservoir, and solves the actual problem of exploiting engineering of energy stored by the dry and hot rocks.

Description

technical field [0001] The invention relates to a high-temperature rock fracture seepage simulation device, in particular to a simulation device for studying the crack evolution process of dry hot rock under high-temperature stress. Background technique [0002] As a clean energy source, hot dry rock is the most potential part of geothermal energy and the future of geothermal energy. Although hot dry rock is ubiquitous and less affected by the external environment, the specific engineering technology for its development has not yet fully matured. For the exploitation of hot dry rock, the key technology is the excitation of reservoir. The excitation of hot dry rock reservoir is to inject high-pressure fluid into the reservoir to make the original cracks of the heat reservoir expand and extend, thus achieving the purpose of increasing the heat transfer performance of the reservoir. Reservoir stimulation is not the ultimate goal of hot dry rock resource development engineerin...

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Problems solved by technology

However, the materials and structures used in the current holders are difficult to meet the above requirements.

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