An in-situ heat exchange laboratory simulation system device for hot dry rock fracturing

Abstract

The invention provides a hot-dry rock fracturing in-situ heat exchange laboratory simulation system device. The device comprises a fracturing fluid injection system, a fracturing body, an annular pressure applying system and a high-pressure pipe valve. The fracturing body comprises a sample fracturing chamber and a sample annular-pressure chamber. The fracturing chamber comprises a three-dimensional fixing support and a three-dimensional hydraulic system. The three-dimensional hydraulic system comprises a hydraulic sliding cavity and a hydraulic moving plug. The sample annular-pressure chamber comprises an annular-pressure chamber steel plate and an inner gum sleeve, a cavity is formed between the gum sleeve and the steel plate, and fluid is injected to realize pressure coating effect. Fracturing fluid injection and annular pressure application are both realized by connection of a high-pressure pipeline with a high-pressure control component. A split module combination structure is adopted, original samples of fracturing samples are ensured to be unchanged, and heat exchange exploitation tests are performed accurately. The device has the advantages of novel structure and safety and durability.

Description

technical field [0001] The invention relates to an in-situ heat exchange simulation mining device for hot dry rock fracturing, in particular to an in-situ heat exchange simulation test device for hot dry rock fracturing and heat exchange flooding replacement, in particular to an in-situ heat exchange for hot dry rock fracturing Laboratory simulation system device. Background technique [0002] The renewable clean energy researched and developed by countries all over the world is mainly divided into hydrothermal type and dry hot rock type. At present, the hydrothermal type geothermal resources mainly exploited and utilized only account for about 10% of the resources, while the dry hot rock type occupies a relatively large proportion. resources, development and utilization efforts are relatively small. In the current situation of energy shortage and severe shortage of oil and gas resources, the exploitation of huge thermal energy resources is especially necessary, and the pro...

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Problems solved by technology

[0003] At present, domestic hydraulic fracturing equipment is mostly used for coal seam fracturing, and formation rock fracturing for oil recovery, mostly used for fracturing and research on fracture systems. The research methods also range from visual drawing to paint, fluorescence, etc., but there is no It is used for the research on geothermal hot dry rocks, and there is no in-situ heat transfer injection-production research on fracturing samples that reflects objective facts

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