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Liquid toughening leakage-blocking agent for well cementation

A kind of lost circulation agent and liquid technology, applied in the field of lost circulation agent, can solve the problems of not playing the role of leakage and leakage prevention, unable to stir evenly, increasing cementing risk, etc., to prevent gas channeling and oil channeling, and reduce viscosity , the effect of increasing the impact strength

Inactive Publication Date: 2019-05-14
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot be stirred evenly in the cement slurry, prone to precipitation, etc., and the utilization efficiency is low
Not only did it not play the role of plugging and preventing leakage, but it increased the risk of cementing

Method used

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  • Liquid toughening leakage-blocking agent for well cementation
  • Liquid toughening leakage-blocking agent for well cementation

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Embodiment Construction

[0015] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] Such as figure 1 As shown, the liquid toughened lost circulation agent for well cementing of the present invention includes a new type of fiber material.

[0017] A liquid toughening plugging agent for cementing, including a new fiber material, the new fiber material is formed by stacking flake graphite microcrystalline organic fibers along the axial direction of the fiber, and is a microcrystalline graphite material obtained by carbonization and graphitization . The carbon content of the new fiber material is not less than 95%. After the liquid toughening plugging agent is prepared, it is added to the stirred cement slurry and stirred.

[0018] The liquid toughening plugging agent is a new type of fiber materi...

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Abstract

The invention relates to a liquid toughening leakage-blocking agent for well cementation. The liquid toughening leakage-blocking agent comprises a novel fiber material which is formed by stacking sheet graphite microcrystalline organic fiber along its axial direction, and a microcrystalline graphite material is obtained by carbonizing and graphitizing. The liquid toughening leakage-blocking agentcan reduce set cement microcrack and block macrocrack expansion, so that resistance to wear, cavitation erosion, scouring and freeze-thawing and anti-permeability can be improved to different degrees;rate of an erosion medium in invading a matrix is lowered, and gas channeling and oil channeling are prevented effectively.

Description

technical field [0001] The invention relates to a lost circulation agent, in particular to a liquid toughened lost circulation agent for well cementing. Background technique [0002] Cement slurry leakage and low return is one of the common and unresolved technical problems in oilfields at home and abroad, especially in the cementing construction of multi-pressure formations, long sealing intervals and low-pressure leakage-prone formations. With the continuous development of the injection-production well pattern, the disorder of the well pattern and the increase in the number of wells drilled in low- and medium-pressure formations. The toughened lost circulation plugging materials used in existing well cementing are basically solid fibers. It cannot be stirred evenly in the cement slurry, and it is prone to precipitation, etc., and the utilization efficiency is low. Not only did it not play the role of plugging and preventing leakage, but it increased the risk of cementing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42C09K8/467C09K8/487C09K8/493
Inventor 周福新刘瑶袁欢游云武刘衍前杨保国李麓曾峰肖博胥超奇张春霞
Owner 中石化石油工程技术服务有限公司
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