Sample preparation device

Abstract

The invention discloses a sample preparation device. supporting rods and a cover plate are arranged at the top end of an upper opening device shell; the upper ends of connecting lines are connected with the supporting rods; film storage bodies and prefabricated slabs are arranged on the connecting lines; an opening is formed in the cover plate; a targeted fracturing wellbore penetrates through the opening and extends into the device shell; a directional perforation plate is arranged at the lower part of the targeted fracturing wellbore; scales are arranged in the circumferential direction of the outer side of the opening; and a pointer is arranged at the top of the wellbore and located over the directional perforation plate. Height control of a hole and seam distribution scheme is achieved by controlling the length of the connecting lines, orientation control of the hole and seam distribution scheme is achieved by changing the position of the connecting lines on the supporting rods and the bottom of the device shell, directional perforation angle control is achieved by pointing to different scales through the pointer, and different seam and hole arrangement modes are achieved. And then the fracture-cavity type carbonate rock targeted fracturing test is carried out, and different influences of different fracture-cavity distribution conditions on fracture initiation and expansion of the targeted fracturing test can be found out.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a sample preparation device. Background technique [0002] With the continuous exploration and development of carbonate oil and gas reservoirs in the world, large deep marine carbonate oil and gas fields have gradually become an important field of oil and gas exploration and development, accounting for 60% of the world's proven oil and gas reserves. Because of its wide distribution, uniform and stable thickness, and good physical properties, it has outstanding mining potential. However, carbonate reservoirs are characterized by deep burial, ultra-high temperature, ultra-high pressure, strong heterogeneity, and well-developed pores and caves, while deep oil and gas resources are mainly stored in complex fracture-cave reservoirs of carbonate rocks. In the pore-fracture structure, this makes its mining more difficult, and most wells need reservoir fracturing to achi...

AI Technical Summary

Problems solved by technology

[0003] However, it is difficult to sample natural fractured-vuggy carbonate rocks. Since fractured-vuggy carbonate rocks have experienced multiple tectonic movements during the deposition process, the differences in natural rock samples are large. The distribution rules are quite different, which is not conducive to carrying out indoor physical simulation experiments

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