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Environment-friendly filtrate reducer for water-based drilling fluid and preparation method and drilling fluid of environment-friendly filtrate reducer

A technology of water-based drilling fluid and fluid loss reducer, which is applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of large fluid loss and poor filter cake quality, and achieves enhanced stability and improved The effect of filter cake quality, good temperature resistance

Active Publication Date: 2019-12-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a kind of fluid loss control agent for environment-friendly water-based drilling fluid and its preparation method, environment-friendly water-based drilling fluid, to solve the problem of poor filter cake quality due to the application of fluid loss control agent in the prior art, Technical problems with large filtration loss

Method used

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  • Environment-friendly filtrate reducer for water-based drilling fluid and preparation method and drilling fluid of environment-friendly filtrate reducer
  • Environment-friendly filtrate reducer for water-based drilling fluid and preparation method and drilling fluid of environment-friendly filtrate reducer
  • Environment-friendly filtrate reducer for water-based drilling fluid and preparation method and drilling fluid of environment-friendly filtrate reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of fluid loss reducer for environment-friendly water-based drilling fluid:

[0055] (1) Reagent preparation:

[0056] ①Weigh 0.04g of ammonium persulfate and dissolve it in 5ml of distilled water to form an ammonium persulfate solution; divide the initiator solution into two equal parts;

[0057] ②Weigh 4g of 2-acrylamido-2-methylpropanesulfonic acid and dissolve it in 15ml of distilled water, prepare 2-acrylamido-2-methylpropanesulfonic acid solution, and adjust the pH of the solution with sodium hydroxide solution Value is 7.0;

[0058] ③Weigh 12g of acrylamide and 3.3g of 60% dimethyldiallyl ammonium chloride aqueous solution and dissolve them in 15ml of distilled water to prepare acrylamide and dimethyldiallyl ammonium chloride aqueous solution;

[0059] (2) Weigh 80ml of distilled water and add it to the reaction vessel, heat it so that the temperature in the reaction vessel is controlled at 35°C, and stir;

[0060] (3) Under the condition that the s...

Embodiment 2

[0065] Preparation of fluid loss reducer for environment-friendly water-based drilling fluid:

[0066] (1) Reagent preparation:

[0067] ①Weigh 0.02g of ammonium persulfate and dissolve it in 5ml of distilled water to form an ammonium persulfate solution; divide the initiator solution into two equal parts;

[0068] ②Weigh 2g of 2-acrylamido-2-methylpropanesulfonic acid and dissolve it in 8ml of distilled water, prepare 2-acrylamido-2-methylpropanesulfonic acid solution, and adjust the pH of the solution with sodium hydroxide solution The value is 6.5;

[0069] ③Weigh 6g of acrylamide and 1.67g of 60% aqueous solution of dimethyldiallylammonium chloride and dissolve them in 8ml of distilled water to prepare acrylamide and aqueous solution of dimethyldiallylammonium chloride;

[0070] (2) Weigh 35ml of distilled water and add it to the reaction vessel, heat it to control the temperature in the reaction vessel at 35°C, and stir;

[0071] (3) Under the condition that the stirri...

Embodiment 3

[0076] Preparation of fluid loss reducer for environment-friendly water-based drilling fluid:

[0077] (1) Reagent preparation:

[0078] ①Weigh 0.04kg of ammonium persulfate and dissolve it in 5L of distilled water to form an ammonium persulfate solution; divide the initiator solution into two equal parts;

[0079] ②Weigh 4kg of 2-acrylamido-2-methylpropanesulfonic acid and dissolve it in 15L of distilled water, prepare 2-acrylamido-2-methylpropanesulfonic acid solution, and adjust the pH of the solution with sodium hydroxide solution Value is 7.5;

[0080] ③ Weigh 12kg of acrylamide and 1.67kg of 60% dimethyldiallyl ammonium chloride aqueous solution and dissolve them in 15L of distilled water to prepare acrylamide and dimethyldiallyl ammonium chloride aqueous solution;

[0081] (2) Weigh 80 L of distilled water and add it to the reaction vessel, heat it so that the temperature in the reaction vessel is controlled at 35° C., and stir;

[0082] (3) Under the condition that ...

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Abstract

The invention provides an environment-friendly filtrate reducer for a water-based drilling fluid and a preparation method and a drilling fluid of the environment-friendly filtrate reducer and aims tosolve the technical problems that in the prior art, a filtrate reducer is poor in filter cake quality and large in filter loss. The filtrate reducer is prepared from low-viscosity carboxymethylcellulose as a raw material after grafting modification, and acrylamide, 2-acrylamide group-2-methallyl sulfonate and dimethyl diallyl ammonium chloride are adopted as grafting monomers. The filtrate reducerprovided by the invention is capable of improving the quality of filter cakes, reducing the filter loss and in addition is environment-friendly and excellent in temperature resistance.

Description

technical field [0001] The invention relates to a fluid loss reducer, in particular to a fluid loss reducer for an environment-friendly water-based drilling fluid, a preparation method thereof, and an environment-friendly water-based drilling fluid. Background technique [0002] During the drilling process, due to the pressure difference, the water in the drilling fluid will inevitably leak into the formation through the wellbore wall, causing the drilling fluid to lose water. As the water enters the formation, the clay particles in the drilling fluid adhere to the well wall to form a "filter cake", forming a filter cake well wall. Since the well wall of the filter cake is much denser than the original well wall, on the one hand, it prevents the drilling fluid from further dehydration, and on the other hand, it plays a role in protecting the well wall. However, during the formation of the filter cake wall, too much water is lost by filtration, the filter cake is too thick, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24C09K8/20C08F251/02C08F220/56
CPCC08F251/02C09K8/206C09K8/24C08F220/56
Inventor 蒲晓林邵旭佳任妍君李方王贵
Owner SOUTHWEST PETROLEUM UNIV
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