Apparatus and preparation method for preparing transparent core containing pores, fissures and horizontal well sections

Abstract

The present invention relates to a device and a preparation method for preparing transparent cores containing pores, fissures, and horizontal well sections, wherein the device for preparing transparent cores containing pores, fissures, and horizontal well sections includes a core preparation device, an inflatable device in the rock, The horizontal well mold embedding system, the gas delivery control system is connected to the inflatable device in the rock body, the motion control system is connected to the sliding polished rod, the inflatable device in the rock body is placed in the rock mass forming mold, the vacuum pumping device is connected to the rock mass forming mold, and the temperature control system Connect the water bath box; the rock mass forming mold is a sealed box assembled from four transparent glass plates; the rock body inflatable device is composed of a sealed box, a gas distributor, a seam-making needle, and a sliding polished rod; the horizontal well mold embedding system includes a horizontal wellbore Mold placement slots, telescopic mold fixtures, sliding gates, horizontal wellbore molds. When simulating the natural fractures and pores existing in formation rocks, the invention realizes the observation and study of the evolution rule of fractures in horizontal well fracturing.

Description

technical field [0001] The invention relates to a preparation device for unconventional oil and gas reservoirs such as tight gas, shale gas, and coalbed methane, and related gas-bearing rock masses, and specifically relates to a device and a preparation method for preparing transparent cores containing pores, fractures, and horizontal well sections. Background technique [0002] There are many pores and fractures in the oil and gas reservoirs of petroleum and natural gas engineering. The characteristic is that in unconventional oil and gas reservoirs such as coalbed methane, shale gas and tight gas, natural pores and fractures are rich in media, which are very important for unconventional oil and gas reservoirs. Reformation and fracture network formation played an important role. However, at present, for reservoirs rich in pore-fracture dual media, especially unconventional oil and gas reservoirs that do not produce oil and gas, fracturing is currently the main technical mea...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device for preparing transparent cores containing pores and fractures and horizontal well sections. This device for preparing transparent cores for containing pores and fractures and horizontal well sections is used to solve the problem of existing horizontal well fracturing simulation experiments. There is a big difference between the distribution of inner pores and fissures in the core and the actual distribution of the inner pores and fissures in the core. Another object of the present invention is to provide this method for preparing transparent cores with internal pores and fissures and horizontal well sections.

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