Hydraulic fracturing ground stress testing system for panoramic drill hole inspection instrument

Abstract

The invention discloses a hydraulic fracturing ground stress testing system for a panoramic drill hole inspection instrument. The hydraulic fracturing ground stress testing system comprises a high-pressure pipe, a pressure sensor, an energy-storing device, a high-pressure oil pump and a data acquisition instrument, wherein a water injection hole is formed in one end of the high-pressure pipe; packers are arranged at the upper end of the water injection hole; the high-pressure pipe is connected with the energy-saving device and the pressure sensor respectively; the energy storing device is connected with the high-pressure oil pump; a flow meter is arranged at the joint of the energy-storing device and the high-pressure oil pump; the pressure sensor is connected with the data acquisition instrument. In a drilled hole, the rubber packers are conveyed to a proper drilling position by a high-rigidity water injection pipe, high-pressure water is injected through the high-pressure pump and the energy-storing device, the water is injected into a rock hole between the packers under a high pressure till surrounding rock is fractured, and the high-pressure pump is closed to closing fractures; the data acquisition instrument is used for acquiring data, analyzing and calculating to obtain the maximum horizontal main stress and the minimum horizontal main stress, and the fracturing direction is the maximum horizontal main stress direction.

Description

technical field [0001] The invention relates to a hydraulic fracturing geostress testing system for a panoramic borehole peeping instrument. Background technique [0002] Borehole peeping is an important part of mine observation. It can be used to observe the range of surrounding rock loose circle, the effect of surrounding rock grouting reinforcement, the effect of bolt anchorage and the dynamic change of surrounding rock structure. It can also be used to observe surrounding rock in water-rich areas. The thickness of seepage fissures and the location of water gushing points, etc. [0003] When the current borehole peeping instrument performs borehole peeping in the water-rich and broken zone of the surrounding rock, because the rock fissure water in the borehole is often mixed with sediment and covers the photoelectric probe lens of the borehole peeping instrument, which seriously hinders the detection effect of the surrounding rock. Can't even carry out borehole peeping, ...

AI Technical Summary

Problems solved by technology

[0003] When the current borehole peeping instrument performs borehole peeping in the water-rich and broken zone of the surrounding rock, because the crack water in the rock formation in the borehole is often mixed with sediment and covers the photoelectric probe lens of the borehole peeping instrument, which seriously hinders the detection effect of the surrounding rock. It is not even possible to peep through boreholes, which brings great difficulties to the monitoring of surrounding rock conditions

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