Amphoteric ion polymeric alcohol for drilling fluid and its preparation method

A zwitterion and drilling fluid technology, which is applied in the direction of drilling compositions, chemical instruments and methods, can solve the problems of drilling fluid viscosity increase, and achieve the effect of inhibiting hydration and good anti-slump effect

Active Publication Date: 2007-05-23
唐山冀油瑞丰化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention purpose of the present invention is: in order to improve the adsorption capacity of polyalcohol to clay, improve the cloud point of polyalcohol, improve the anti-high temperature performance of polyalcohol, be used in land and sea deep layer (3500~5500m) oil and gas layer drilling, solve the electropositive property Drilling fluid viscosity increase problem caused by high temperature, provide a zwitterionic polymerization for drilling fluid produced by polymerization reaction of alkenyl acid, alkenyl amide, alkenyl sulfonic acid, alkenyl quaternary ammonium salt with ethylene oxide, propylene oxide Alcohol and preparation method, achieve the purpose of improving the performance of polyalcohol

Method used

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  • Amphoteric ion polymeric alcohol for drilling fluid and its preparation method

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Effect test

Embodiment 1

[0014] Example 1. Add 50 g of acrylic acid, 165 g of acrylamide, 95 g of 2-acrylamido-2-methylpropanesulfonic acid, 45 g of allyl trimethyl ammonium chloride, 750 g of ethylene oxide and cyclohexane to the polymerization reactor. Oxypropane 1650g, initiator propylene glycol 65g, polymerization catalyst benzoyl peroxide 25g, heated to 105°C under constant stirring, the polymerization reaction started and was intense, and cooling water was introduced to adjust the reaction temperature.

[0015] Keep the reaction temperature at 120-135°C and the reaction pressure at 0.3-0.5Mpa. After 2-3h reaction, cooling water is introduced to cool to 70-80°C. The polymer is slowly added to another reaction vessel, and this reaction vessel has a pre-prepared concentration of 20% (mass percent) potassium hydroxide solution, and the neutralization reaction is exothermic, and the temperature of the reactor is controlled at 80 °C by cooling water. -90°C, when the pH of the solution is 7-8, 6850 g o...

Embodiment 2

[0016] Example 2. Add 65g of methacrylic acid, 145g of acrylamide, 100g of 2-acrylamido-2-methylpropanesulfonic acid, 37g of allyltrimethylammonium chloride, and 900g of ethylene oxide to the polymerization reactor and propylene oxide 1600g, initiator glycerol 73g, polymerization catalyst benzoyl peroxide 22g, heated to 105 ℃ under constant stirring, the polymerization reaction started, the reaction temperature was adjusted by cooling water, and the temperature was controlled at 110-140 ℃ Within the range, the reaction pressure is 0.2-0.6MPa, and after 2-3h reaction, it is cooled to 70-80 ℃ by cooling water. A polymer was slowly added to a reaction vessel with a concentration of 20% (mass percent) potassium hydroxide solution to carry out neutralization reaction, and the reaction temperature was controlled at 80-90°C. When the pH of the solution is 7-8, the neutralization reaction is completed, and 7400 g of zwitterionic polymer alcohol for drilling fluid with a concentration ...

Embodiment 3

[0017] Example 3. Drilling fluid rheological test

[0018] The fresh water base slurry used in the test is 4% anqiu sodium bentonite, and the salt water base slurry is 10% anqiu sodium bentonite added to a 4% NaCl aqueous solution.

[0019] strip

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Abstract

The invention relates to a kind of amphion poly-alcohol used in well boring liquid as well as its preparing method which belongs to the domain of accessory ingredient for well boring liquid. The ingredient of the invention includes olefinic acid, alkenyl amide, alkenyl sulfonic acid, alkenyl quaternary ammonium salt, ekibon, epoxypropane, alkenyl metamer. The ratio of alkenyl metamer, ekibon and epoxypropane is 10-30%:15-30%: 20-80%. The preparing procedure includes the following steps: putting the material into the polymerizing reactor and adding the initiator and polymerization catalyst to let them react at 100-150DEG C, 0.1 -2Mpa for 1-5h; neutralizing the polymerized product with carstic potash solution to get the product. The invention has many characteristics such as high temperature proof, salt proof, strong rejection capability, oil gas protection and environment-friendly. It can be used to prevent the collapse, protect the oil gas or be used as the slime stabilizing agent in the proving and exploring of oil and natural gas.

Description

technical field [0001] The invention relates to an auxiliary agent for drilling fluid and a preparation method thereof, in particular to a zwitterionic polymer alcohol for drilling fluid which can protect both oil and gas layers and the environment and a preparation method thereof. Background technique [0002] Oil-based drilling fluids have long been used to drill into water-sensitive formations to address shale stability, differential pressure sticking, and bit mud-packing. Oil-based drilling fluids pollute the environment, have an impact on logging operations, have high costs, and limit their use. Polymeric alcohol drilling fluid is one of the latest technologies of international drilling fluids in the 1990s, and it is a good substitute for oil-based drilling fluids. U.S.Pat.No.5602082 (Hale AH.) and U.S.Pat.No.5945386 (Alonso-DeboltM A.) proposed that polyalcohols produced by the polymerization of ethylene oxide and propylene oxide are used in water-based drilling fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C08F220/38C08F220/06C08F220/56C08G59/17
Inventor 乔孟占
Owner 唐山冀油瑞丰化工有限公司
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