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Temperature-sensitive intelligent plugging agent as well as preparation method and application thereof

A temperature-sensitive, intelligent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of ineffective plugging of large cracks and insufficient pressure bearing capacity

Active Publication Date: 2021-05-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems that the existing plugging materials are not effective in plugging large cracks and have insufficient pressure bearing capacity under high temperature conditions, the present invention proposes a temperature-sensitive intelligent plugging agent composition based on shape memory polymer and its preparation method

Method used

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  • Temperature-sensitive intelligent plugging agent as well as preparation method and application thereof
  • Temperature-sensitive intelligent plugging agent as well as preparation method and application thereof
  • Temperature-sensitive intelligent plugging agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A temperature-controlled intelligent leak-stopping agent composition, comprising 10% of shape-memory polymer (pressed into a flat sheet), 2% of fiber material, 5% of superfine calcium carbonate, and others as basic slurry. The fiber material is a combination of sawdust, peanut shell powder and crop straw powder with a mass percentage of 3:3:4.

Embodiment 2

[0044] A temperature-controlled intelligent leak-stopping agent composition, comprising 12% of a shape memory polymer (pressed into a flat sheet), 4% of a fiber material, 8% of a calcium carbonate material, and other base slurry.

[0045] The fiber material is a combination of sawdust, peanut shell powder and crop straw powder in a mass percentage of 3:3:4.

[0046] The calcium carbonate material is a combination of superfine calcium carbonate and super heavy calcium carbonate with a mass ratio of 1:1.

Embodiment 3

[0048] A temperature-controlled intelligent leak-stopping agent composition, comprising 15% of a shape memory polymer (pressed into a flat sheet), 5% of a fiber material, 10% of a calcium carbonate material, and other base slurry.

[0049] The fiber material is a combination of sawdust, peanut shell powder and crop straw powder in a mass percentage of 3:2:5.

[0050] The calcium carbonate material is a combination of superfine calcium carbonate and super heavy calcium carbonate with a mass ratio of 1.5:1.

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Abstract

The invention relates to a temperature-sensitive intelligent plugging agent as well as a preparation method and application thereof. The plugging agent is mainly prepared from a shape memory polymer material, a fiber material, a calcium carbonate material and basic slurry. The shape memory polymer is prepared by heating and reacting epoxy resin and a curing agent in the presence of a catalyst. The plugging agent containing the shape memory polymer can generate a shape recovery volume expansion effect in a high-temperature environment, can generate a synergistic plugging effect with the fiber material and the calcium carbonate material, and can effectively plug large cracks.

Description

technical field [0001] The invention relates to a temperature-sensitive intelligent leak plugging agent and its preparation method and application, belonging to the technical field of drilling intelligent materials. Background technique [0002] With the continuous deepening of oil and gas exploration and development, the formations encountered in mining are becoming more and more complex, especially when drilling into fractured, weakly cemented formations or formations with fractures and caves, the problem of lost circulation is very serious. According to data statistics, the occurrence rate of lost circulation accounts for 25-30% of the total number of drilling wells, and serious lost circulation loss accounts for more than 70% of the total lost circulation loss. At present, although a large number of different types of plugging agents and various plugging measures have been developed, conventional plugging materials are relatively weak when drilling large fractures and ca...

Claims

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Application Information

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IPC IPC(8): C09K8/467C09K8/24C09K8/03C09K8/42
CPCC09K8/426C09K8/467C09K8/03C09K8/24C09K2208/08
Inventor 王彦玲汤龙皓巩锦程梁雷刘斌张传保
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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