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Composite chemical blocking agent

A plugging agent, chemical technology, applied in the field of compound chemical plugging agent, can solve the problems of high risk, difficulty, large amount of plugging agent, etc.

Inactive Publication Date: 2012-03-28
任丘市奥源石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These water plugging technologies have played an important role in oilfield development. However, the construction process of water glass high-strength chemical water plugging technology is complex, difficult, and dangerous, and the amount of plugging agent is large, the construction period is long, and plugging removal is difficult. ; The cyanogen plugging agent with polyurethane as the main component has a short gel time, less dosage, and high plugging strength, but the process is complicated, the risk is high, and the plugging thickness is small, so it is not suitable for large-scale plugging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A composite chemical plugging agent, comprising a structure forming agent, a curing reinforcing agent, a fiber plastic reinforcing agent, an expansion agent and a performance regulating agent, wherein the structure forming agent, a curing reinforcing agent, a fiber plastic reinforcing agent, an expanding agent and a performance regulating agent The mass ratios of the agents are: 60%-80%, 15%-35%, 0.3%-0.35%, 3%-5%, 0.2%-0.25%.

Embodiment 2

[0022] A composite chemical plugging agent, comprising a structure forming agent, a curing reinforcing agent, a fiber plastic reinforcing agent, an expansion agent and a performance regulating agent, wherein the structure forming agent, a curing reinforcing agent, a fiber plastic reinforcing agent, an expanding agent and a performance regulating agent The mass ratios of the agents are: 67%, 20%, 3%, 5%, 5%.

[0023] After the well fails to use other plugging methods, the compound plugging agent of the present invention is used for plugging, and the oil casing balancing process and the construction technology of lower sealing and upper mining are adopted on site.

[0024] Plugging: Two 7m3 stirring tanks on site are equipped with a blocking agent of 15m3 and a density of 1.75g / cm3 (structure forming agent, curing reinforcing agent, fiber plastic reinforcing agent, suspension stabilizer and performance regulator, wherein the structure forming agent, curing reinforcing agent , Fi...

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PUM

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Abstract

The invention relates to a composite chemical blocking agent. The chemical blocking agent consists of structure forming agent, curing reinforcing agent, fiber plasticity reinforcing agent, suspension stabilizer, water holding thickening time control agent and the like. Compared with the conventional oil well cement blocking agent, the composite chemical blocking agent has the advantages of high construction safety, high blocking success rate, high blocking strength, long validity period, high mineralization resistance, high temperature and high pressure resistance and the like. The composite chemical blocking agent applied in chemical blocking and channeling sealing processes of oil and gas wells achieves good effects.

Description

technical field [0001] The invention relates to the technical field of chemical plugging technology, in particular to a composite chemical plugging agent. Background technique [0002] With the continuous development of oil and gas fields, the degree of production of reserves continues to increase, the water production of oil and gas reservoirs and the number of water-producing gas wells increase rapidly, and various contradictions and problems gradually appear. Problems, serious sand production, layer channeling, edge water, bottom water intrusion, premature water production or water flooding of some oil and gas wells, water production has become an important factor restricting gas field productivity, mainly reflected in: the overall water production of oil and gas fields increases rapidly The water relationship is complex, the law of wellbore fluid accumulation is unclear, the production decline of a single well is obvious, and the production declines rapidly. The increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467C09K8/48
Inventor 杨建平
Owner 任丘市奥源石油科技有限公司
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