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Amine shale stabilizer for drilling fluid

A technology of shale stabilizer and drilling fluid, which can be used in drilling compositions, chemical instruments and methods, etc., and can solve problems such as lack of systematic and in-depth research.

Inactive Publication Date: 2012-05-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyamine strong inhibitors for high-performance water-based drilling fluids are the latest research results abroad, but there is a lack of systematic and in-depth research in China

Method used

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  • Amine shale stabilizer for drilling fluid
  • Amine shale stabilizer for drilling fluid
  • Amine shale stabilizer for drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0009] Add 330 g of diethylene glycol bis(3-aminopropyl) ether and 0.33 g of potassium hydroxide into a high-temperature and high-pressure reactor with a volume of 1 L, vacuumize the reactor and start heating, and start stirring at the same time, and the stirring speed is 300 r / min . When the temperature rose to 90°C, 26.4 g of ethylene oxide was introduced. Continue to raise the temperature, and when the temperature rises to 115° C., 105.6 g of ethylene oxide is introduced. After the reaction starts, maintain the reaction temperature at 120°C. After the pressure in the reactor drops and remains constant, continue to maintain the temperature for 30 minutes, then cool to room temperature, and discharge the material from the kettle to obtain a colorless or slightly yellow liquid, which can be directly added to the drilling fluid. as a shale inhibitor. The preparation reaction formula is as follows:

[0010]

example 2

[0012] Add 330 g of diethylene glycol bis(3-aminopropyl) ether and 0.33 g of potassium hydroxide into a high-temperature and high-pressure reactor with a volume of 1 L, vacuumize the reactor and start heating, and start stirring at the same time, and the stirring speed is 300 r / min . When the temperature rose to 90°C, 26.4 g of ethylene oxide was introduced. Continue to raise the temperature, and when the temperature rises to 115° C., 105.6 g of ethylene oxide is introduced. After the reaction starts, keep the reaction temperature at 120°C. After the pressure in the reactor drops and remains unchanged, continue to maintain the temperature for 30 minutes, then cool to room temperature, and discharge the material from the kettle to obtain a colorless or slightly yellow viscous liquid, which can be directly added Used as shale inhibitor in drilling fluid. The preparation reaction formula is as follows:

[0013]

example 3

[0014] Example 3: Inhibitory Evaluation

[0015] In order to evaluate the inhibitory performance of the synthesized amine compound as a shale inhibitor, the performance of the synthesized amine shale stabilizer was compared with the traditional inorganic salt inhibitor KCl and the foreign shale inhibitor Ultrahib. Experimental evaluation was carried out by inhibiting bentonite slurrying test, buckling hardness test and shale rolling dispersion test respectively.

[0016] 1. Inhibition of bentonite slurry experiment

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Abstract

The invention relates to a development for an amine shale stabilizer for a drilling fluid and a preparation method for the same, which is characterized in that the amine shale stabilizer disclosed by the invention is a polymer generated by reacting polyethenoxyamine with epoxide alkane. The polyethenoxyamine is polyoxyethylene diamine or polypropylene diamine or polyoxyethylene propylene diamine, and the molecular weight thereof is less than 1000. The epoxide alkane is one or the mixture composed of two or more of ethylene oxide, propylene epoxide and butylene oxide. During a preparation process, the polyethenoxyamine and the epoxide alkane are poured in a high-temperature and high-pressure reactor according to a molar ratio of 10: 1 to 1: 20, and then reacted at 90-140 DEG C under the function of a catalyst to obtain the amine shale stabilizer for a drilling fluid. The amine shale stabilizer can efficiently prevent shale and clay from being hydrated.

Description

technical field [0001] The invention belongs to a mud shale stabilizer for petroleum drilling fluid. Background technique [0002] With the development of the petroleum industry, complex deep oil and gas drilling is facing more and more technical challenges. Drilling engineering puts forward higher and more comprehensive requirements for drilling fluid technology. Borehole wall instability is a major engineering technical problem in drilling. Wellbore stability is the prerequisite for safe, fast and high-quality drilling, and it is one of the key factors to control drilling costs and affect the comprehensive benefits of drilling. Maintaining wellbore stability is the primary factor in drilling fluid design. The anti-slump and suppression ability of drilling fluid is one of the important indicators of drilling fluid performance, and it is a hot spot and difficulty that drilling fluid researchers at home and abroad pay attention to. Oil-based drilling fluids have the advant...

Claims

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Application Information

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IPC IPC(8): C09K8/24
Inventor 邱正松钟汉毅黄维安林永学刘贵传张国江琳曹杰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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