A hydraulic fracturing packer device

Abstract

The invention provides a hydraulic fracturing packer device, and belongs to the crustal stress test field; the hydraulic fracturing packer device can set a supersonic wave imaging system on a diversion central rod, and the supersonic wave imaging system can be assembled with the hydraulic fracturing packer device to descend the well, thus dynamically imaging borehole wall induced fractures in realtime. The hydraulic fracturing packer device can fast and easily measure the deep hole crustal stress, and can use one time fracturing operation for fracturing and imaging so as to test the principalstress size and direction, thus greatly improving the measuring efficiency; the hydraulic fracturing packer device can use the supersonic wave imaging system to realize real time dynamic imaging, thus providing more reliable and precision imaging results.

Description

technical field [0001] The invention relates to the technical field of geostress measurement, in particular to a hydraulic fracturing packer device. Background technique [0002] In-situ stress is the initial stress existing in the crustal rock mass, and it is also one of the important physical property parameters of the solid earth. In-situ stress is the root force that causes deformation, instability and destruction of rock mass, and is also an important parameter that affects the exploitation of deep energy such as oil, shale gas, and hot dry rock. Therefore, the measurement of ground stress has important scientific and practical significance in the study of earthquake mechanism, energy exploitation, design of mine tunnels, and construction of large dam foundations. [0003] The most important method for measuring ground stress is hydraulic fracturing. Hydraulic fracturing is a method of determining the magnitude and direction of in-situ stress by isolating a section of...

AI Technical Summary

Problems solved by technology

The existing method for obtaining the maximum horizontal principal stress direction is mainly the impression method, that is, using the impression rubber cylinder to imprint the traces of induced cracks on the vulcanized rubber on the surface under high pressure. This method is simple and intuitive, but it also has many shortcomings, mainly as follows: : time-consuming, labor-intensive, inefficient, and only 1-2 test point direction information can be obtained each time the drill is drilled; For large boreholes, since the stress that induces cracks to reopen is also relatively large, it is difficult to clearly print the marks that will induce cracks

The above shortcomings will have a more serious impact on the experimental results when the drilling depth is large and the drilling conditions are complex.

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