Shale reservoir post-fracturing seepage microscopic model, manufacturing method and experimental device

A shale reservoir and microscopic model technology, applied in the field of shale oil and gas reservoir research, can solve problems such as difficulty in observing seepage and inability to simulate shale reservoirs

Pending Publication Date: 2022-01-07
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using on-site cores or artificial cores for flow experiments, it is difficult to observe the internal seepage, and the flow or saturation state of fluid in fractures and matrix cannot be identified by human eyes,

Method used

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  • Shale reservoir post-fracturing seepage microscopic model, manufacturing method and experimental device
  • Shale reservoir post-fracturing seepage microscopic model, manufacturing method and experimental device
  • Shale reservoir post-fracturing seepage microscopic model, manufacturing method and experimental device

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Experimental program
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Embodiment

[0081] Experimental device Experimental operation process:

[0082] 1) Inhale the fluid to be injected with a Luer sampler and place it on a Harvard PHD 22 precision syringe pump;

[0083] 2) Use a 1 / 16-inch outer diameter peek pipeline to connect the Luer sampler to the joint port 11 of the micromodel;

[0084] 3) Place the microscopic model on a Lecia DM2700 M upright metallurgical microscope;

[0085] 4) Connect the CYYZ35 intelligent pressure transmitter to the 1 / 16-inch outer diameter peek pipe in step 2), and observe the pressure change;

[0086] 5) Adjust the flow rate, start the Harvard PHD 22 precision syringe pump, so that the fluid flows into the micromodel joint port 11 through the 1 / 16-inch outer diameter peek pipeline;

[0087] 6) Open the Leica imaging software LAS EZ in the computer, adjust the eyepiece and objective lens multiples of the Lecia DM2700 M upright metallurgical microscope, so that the internal structure of the microscopic model can be clearly im...

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Abstract

The invention belongs to the field of shale oil and gas reservoir research, relates to a shale reservoir post-fracturing seepage micro-model, a manufacturing method and an experimental device and aims to simulate a reservoir microscopic model with a micron-sized pore throat according to the characteristics of low porosity and low permeability of shale oil and gas reservoirs so as to solve the problem that the seepage characteristics of fluids in shale are difficult to observe macroscopically. The manufacturing process of the microscopic model roughly comprises three parts: firstly, manufacturing a mask, and exposing the mask to obtain a model diagram required to be used; performing exposure treatment on a substrate by using the mask, transferring an etching pattern to a photoresist, transferring the etching pattern to a chromium layer from the photoresist, and then transferring the etching pattern to the substrate; and finally, carrying out anodic bonding to manufacture the substrate, thereby obtaining the microscopic model. The microscopic model can be combined with an image acquisition device and an image display device to carry out visual research on injected fluid in the microscopic model, and the flowing condition of the fluid in a micron-sized fracture-matrix reservoir is observed.

Description

technical field [0001] The invention belongs to the research field of shale oil and gas reservoirs, in particular to a microscopic model of seepage after fracturing of shale reservoirs, a manufacturing method and an experimental device. Background technique [0002] It is an inevitable trend in the development of the petroleum industry that the field of oil and gas exploration and development has shifted from conventional oil and gas to unconventional oil and gas. China's rich shale oil resources have become one of the main fields in unconventional oil exploration. However, shale reservoirs have complex structures, strong compactness, strong heterogeneity, and porphyritic wetting characteristics, so they cannot be developed by conventional means. Through the theoretical research on the efficient development of shale reservoirs, it is found that the comprehensive use of multiple fracturing technologies to transform the conventional single main fracture development model into ...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01M10/00
CPCG01N33/24G01M10/00
Inventor 赖南君吴雨潇唐雷朱元强石伟纪佑军郑学成
Owner SOUTHWEST PETROLEUM UNIV
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