A clamper for indoor hydraulic fracturing experiments

Abstract

The present invention relates to the technical field of rock physical performance experimental devices, and provides a clamper for indoor hydraulic fracturing experiments, including a clamper body, a fracturing tube is arranged in the clamper body, and a plug is connected to the fracturing tube; The center of the fracturing tube is provided with a first channel along the axial direction of the fracturing tube, the fracturing tube on the side away from the plug is provided with a through hole, and the fracturing tube near the side of the plug is provided with a groove; the center of the plug is arranged along the The plug is axially provided with a second channel, the end of the plug close to the fracturing tube is provided with a first connecting hole, and the end of the plug far away from the fracturing tube is provided with a second connecting hole; with this technical solution, the pressure The crack tube and the plug can be directly scanned by CT in the holder body, and the core hydraulic fracturing fracture can be extracted more accurately. An O-ring is added to the groove to ensure the seal between the fracturing tube and the plug. The tube is an irregular cylindrical tube and does not need to be disassembled, so there is no need to cut the core, which will not cause secondary damage to the core.

Description

technical field [0001] The invention relates to the technical field of rock physical performance experimental devices, in particular to. Background technique [0002] Hydraulic fracturing is one of the key technologies for oil and gas stimulation of unconventional reservoirs. Since the depth of hydraulic fracturing on reservoirs is often below a few thousand meters, it is desirable to directly observe hydraulic fractures during oil and gas production. Scaling is very difficult. Therefore, many scholars use indoor experiments to simulate the underground hydraulic fracturing process. Indoor hydraulic fracturing has the characteristics of small core size, complex environment simulation and convenient observation. [0003] Common indoor fracturing systems and equipment such as figure 1 As shown, usually contain recovery system, frac system and power system. The fracturing degree of the core can be evaluated by using the fracture expansion of the core and the pressure change ...

AI Technical Summary

Problems solved by technology

[0005] (1) It is necessary to remove the fracturing fluid pressure, open the holder to disassemble the metal pipeline, and the disappearance of the fluid pressure will cause some secondary micro-fractures formed during the core fracturing process to close, which will affect the observation on the CT equipment in the later stage

[0006] (2) Metal fracturing pipelines are usually long pipes and form a seal with the core, so the core must be cut during the removal of the metal pipeline, and cutting the core will cause secondary damage to the core, and secondary micro-cracks in the core will be severely damaged. Effect of fracturing force

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