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Method for testing plugging capability of plugging agent for fracturing

A technology of capacity testing and plugging agent, which is applied in the field of hydraulic fracturing, can solve the problems of restricting the application of plugging agent and no patent application for invention

Active Publication Date: 2018-10-09
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no relevant industry standards and patent applications for related inventions, which greatly restricts the application of plugging agents in fractured tight oil and gas reservoirs.

Method used

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  • Method for testing plugging capability of plugging agent for fracturing
  • Method for testing plugging capability of plugging agent for fracturing
  • Method for testing plugging capability of plugging agent for fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] see Figure 1-Figure 2 , an embodiment of the plugging ability test method of the plugging agent for fracturing, comprising the following steps:

[0038] Step 1, a certain amount (denoted as w f ) plugging agent into a beaker filled with a certain amount of diesel oil (or formation crude oil) and distilled water, stir evenly and seal it, put it into a constant temperature box and heat it to the formation temperature. Take it out at regular intervals and take pictures for observation. After testing for a long time (recommended to be greater than or equal to 300 hours), use filter paper to filter, dry and weigh, respectively recorded as w 1 and w 2 . The anti-dissolution ability formula of plugging agent in oil and water is:

[0039]

[0040]

[0041] Among them, DR o is the resistance to dissolution of the plugging agent in oil, DRw It is the anti-dissolution ability of the blocking agent in water.

[0042] Step 2: Lay proppants with different sanding concent...

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PUM

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Abstract

The invention discloses a method for testing the plugging capability of a plugging agent for fracturing. The plugging fracturing actual condition can be simulated well, and guidance is provided for optimization of the plugging agent and the use amount of the plugging agent. The method comprises the following steps: S1, testing the dissolution resistance of the plugging agent; S2, testing the propfracture permeability of the plugging agent; S3, testing the prop fracture plugging capability of the plugging agent; S4, testing the hollow fracture plugging capability of the plugging agent.

Description

technical field [0001] The invention belongs to the technical field of hydraulic fracturing, and relates to a method for testing the plugging ability of a plugging agent for fracturing. Background technique [0002] Hydraulic fracturing is the key technology for the economical and effective development of fractured tight sandstone oil and gas reservoirs. However, due to the existence of a large number of natural fractures (especially high-angle natural fractures), the hydraulic fractures formed by hydraulic fracturing are easy to extend along the natural fractures. The adjacent water layer is communicated vertically, so that the oil and gas wells produce a large amount of water and greatly reduce the oil and gas production. At present, the most effective way to solve this problem is to add plugging agent (granular insoluble solid) along with the fracturing fluid during fracturing construction. After the plugging agent enters the natural fracture, it will hold the pressure in...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 肖晖罗雄
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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