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Cation emulsion asphalt anti-collapse agent for well drilling fluid and its producing method

A technology of emulsified asphalt and cations, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems that restrict the overall benefits of drilling and oil fields, collapse, and irregular well diameters, so as to reduce the occurrence of downhole complex situations and improve The effect of stable quality and performance

Inactive Publication Date: 2007-06-20
玉门石油管理局有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the Qingxi area of ​​Yumen Oilfield, there are two structures, Liugouzhuang and Kulongshan. The wells drilled are all deep wells with a depth of more than 4,000 meters, and almost all of them are long open-hole wells. The Kulongshan structure belongs to the piedmont structural belt and overthrust nappe This geological condition brings some technical problems to drilling fluid construction, such as lost circulation, diameter shrinkage, collapse, irregular well diameter and protection of fractured oil layers, which seriously restricts the improvement of overall benefits of drilling and oilfields

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Equipment used in production: reaction kettle, metering tank, condenser, homogenizer, heat carrier heating furnace.

[0037] The production process of anti-collapse agent of the present invention is:

[0038] A. Preparation of polymer emulsion

[0039] ①Take 200kg of No. 15 industrial additive oil, add 30kg of sorbitan monooleate and mix well;

[0040] ② Add 90kg of acrylic acid monomer to 200kg of deionized water, neutralize it with 70kg of industrial grade potassium hydroxide, and prepare a monomer solution;

[0041] ③Under stirring conditions, pour the monomer solution prepared in step ② into the mixed solution in step ①, heat up to 70-80°C to form an oily emulsion, and add 1kg of dibenzoyl peroxide initiator solution dropwise , standing still after 3-4 hours of polymerization to make a polymer emulsion;

[0042] B. Preparation of cationic asphalt emulsion

[0043] ① Screen various asphalt raw materials through fluorescence analysis technology, and select a kind ...

Embodiment 2

[0051] The production process of anti-collapse agent of the present invention is:

[0052] A. Preparation of polymer emulsion

[0053] ① Take 300kg of No. 10 industrial additive oil, add 50kg of sorbitan monooleate and mix well,

[0054] ②Add 100kg of acrylic acid monomer to 150kg of deionized water, neutralize it with 80kg of industrial grade potassium hydroxide, and prepare a monomer solution;

[0055] ③Under stirring conditions, pour the monomer solution prepared in step ② into the mixed solution in step ①, heat up to 70-80°C to form an oily emulsion, and add 2kg of dibenzoyl peroxide initiator solution dropwise , standing still after 3-4 hours of polymerization to make a polymer emulsion;

[0056] B. Preparation of cationic asphalt emulsion

[0057] ①Heat and melt 450kg of asphalt, pour it into 200kg of No. 10 industrial additive oil, add 50kg of sorbitan monooleate, stir evenly, and keep the temperature at 80-85°C;

[0058] ②Heat 300kg of deionized water to 80°C and a...

Embodiment 3

[0064] The production process of anti-collapse agent of the present invention is:

[0065] A. Preparation of polymer emulsion

[0066] ①Take 250kg of No. 15 industrial additive oil, add 40kg of sorbitan monooleate and mix well,

[0067] ②Add 95kg of acrylic acid monomer to 180kg of deionized water, neutralize it with 75kg of industrial grade potassium hydroxide, and prepare a monomer solution;

[0068] ③Under stirring conditions, pour the monomer solution prepared in step ② into the mixed solution in step ①, heat up to 70-80°C to form an oily emulsion, and add 1.5kg of dibenzoyl peroxide initiator dropwise Solution, after 3-4 hours of polymerization reaction, stand still to make polymer emulsion;

[0069] B. Preparation of cationic asphalt emulsion

[0070] ①Heat and melt 420kg of asphalt, pour it into 200kg of No. 15 industrial additive oil, add 50kg of sorbitan monooleate, stir evenly, and keep the temperature at 80-85°C;

[0071] ②Heat 200kg of deionized water to 80°C, ...

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Abstract

The cation emulsified asphalt as collapse-preventing agent for well drilling fluid consists of asphalt 20-40wt%, potassium hydroxide 4-9 wt%, ammonium cetyl trimethyl chloride 1-3wt%, industrial assistant oil 15-30wt%, acrylic acid monomer 5-8wt%, deionized water 15-30wt%, dibenzoyl peroxide 0.1-0.2wt%, ammonium epoxypropyl trimethyl chloride 5-8wt% and sorbitan monooleate. The preparation process of the cation emulsified asphalt as collapse-preventing agent includes the steps of preparation of polymer emulsion, preparation of cation asphalt emulsion and compounding of polymer-cation asphalt emulsion. The collapse-preventing agent can be compounded well to cation polymer well drilling fluid to form stable well drilling fluid with obviously improved performance.

Description

technical field [0001] The invention relates to a treatment agent for drilling fluid and a production method thereof. Background technique [0002] In the Qingxi area of ​​Yumen Oilfield, there are two structures, Liugouzhuang and Kulongshan. The wells drilled are all deep wells with a depth of more than 4,000 meters, and almost all of them are long open-hole wells. The Kulongshan structure belongs to the piedmont structural belt and overthrust nappe This geological condition brings some technical problems to drilling fluid construction, such as lost circulation, diameter shrinkage, collapse, irregular well diameter and fractured oil layer protection, which seriously restricts the improvement of overall benefits of drilling and oilfields. Contents of the invention [0003] The object of the present invention is to provide a cationic emulsified asphalt anti-slump agent for drilling fluid. [0004] Another object of the present invention is to provide a production method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/514
Inventor 束卫东张宾陈荣富马磊窦爱云
Owner 玉门石油管理局有限公司
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