Preparation device and method for simulating horizontal well shaft in transparent core

Abstract

The present invention relates to a preparation device and method for simulating a horizontal well shaft in a transparent core, wherein the experimental device for simulating a horizontal well in the core production process includes a rock mass forming mold, a fracture control system, an inflatable device in the rock body, Gas transmission control system, motion control system, horizontal well mold embedding system, the gas transmission control system is connected to the rock inflatable device through the gas transmission pipe, the motion control system is connected to the sliding polished rod through the rotating screw, and the rock inflatable device is placed in the rock mass forming In the mould, the rock mass forming mold is a sealed box assembled from four transparent glass plates; the inflatable device in the rock body is composed of a sealed box, a gas distributor, a seam-making needle, and a sliding polished rod. Rod; the horizontal well mold embedding system includes a horizontal well mold placement groove, a telescopic mold fixing device, a sliding gate, and a horizontal wellbore mold; the fixed rod is controlled by the seam-making control system to realize any azimuth arrangement of the horizontal section of the horizontal wellbore mold. The invention provides a visualization method for observing the evolution law of micro-cracks during the fracturing process of the horizontal well.

Description

technical field [0001] The present invention relates to a method and a preparation device for making unconventional oil and gas reservoirs such as tight oil and gas, shale oil and gas, and coalbed methane, and related gas-bearing rock masses, and specifically relates to a preparation device for simulating a horizontal well shaft in a transparent rock core and Preparation. Background technique [0002] In the production process of oil and gas engineering, especially in unconventional oil and gas production processes such as shale oil and gas, tight sandstone oil and gas, horizontal well volume fracturing technology is often used, by simulating different horizontal wellbore orientations, lengths of horizontal well sections, etc. Describe the law of crack formation. For example, the angle between the set horizontal wellbore azimuth and the natural fracture development azimuth is different, and the formed fracture propagation behavior and fracture network evolution law are obvi...

AI Technical Summary

Problems solved by technology

The fracturing technology for horizontal wells has been widely affected in oil and gas field production, but the description of the evolution law of volumetric fracturing fractures in horizontal wells such as unconventional oil and gas reservoirs is still a difficult and bottleneck problem in international oil and gas production. It is due to the particularity of on-site fracturing and there are still great limitations in the description and understanding of the fracture network law of fracturing.

As a result, many problems such as low fluid production and rapid fluid production decline in unconventional oil and gas production cannot be clearly explained

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