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A fluid loss reducer suitable for aluminate cement slurry and its preparation method

A fluid loss reducing agent and cement slurry technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems affecting the production safety and production life of heavy oil thermal recovery wells, the reduction of thermal stability of oil well cement stones, aluminum alloys, etc. Solve the problems of large water loss in salt cement slurry, and achieve the effect of improving the ability to reduce water loss, reducing water loss, and shortening the synthesis cycle

Active Publication Date: 2022-03-11
CNPC DRILLING RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of thermal recovery of heavy oil, the thermal stability of oil well cement after adding sand will still be reduced, so that the cementing quality and cement sheath integrity of heavy oil thermal recovery wells have not been resolved, thus affecting thick oil wells. Production safety and production life of oil thermal recovery wells
At present, the water-cement ratio of aluminate cement slurry is relatively large, the solid content is small, and the free water is relatively large, which leads to a large amount of water loss in aluminate cement slurry, causing rheological parameters and thickening time to deviate far from the preset values, seriously reducing Displacement efficiency affects construction quality and even leads to failure of cementing operation
The oil well cement fluid loss reducer used for Portland cement is often not suitable for aluminate cement slurry, and there is an urgent need to develop a fluid loss reducer suitable for aluminate cement slurry

Method used

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  • A fluid loss reducer suitable for aluminate cement slurry and its preparation method
  • A fluid loss reducer suitable for aluminate cement slurry and its preparation method
  • A fluid loss reducer suitable for aluminate cement slurry and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation process of fluid loss reducer:

[0033] Formula 1: 21.2 grams of N-(3-dimethylaminopropyl) methacrylamide, 16.7 grams of methacryloyloxyethyltrimethylammonium chloride, 12.3 grams of 2-acrylamido-2-methylpropane Sulfonic acid, 0.7 grams of acrylic acid, 0.4 grams of ammonium persulfate, 124 grams of water.

[0034] 1. Preparation method of Agent A: Weigh each component for later use, add some water to the reaction kettle, and then add 21.2 grams of N-(3-dimethylaminopropyl) methacrylamide and 12.3 grams of 2-propylene Amino-2-methylpropanesulfonic acid, stir until the material is completely dissolved, add an inorganic base to adjust the pH to 8, then add 16.7 grams of methacryloyloxyethyltrimethylammonium chloride component and 0.7 gram of acrylic acid, stirred at a speed of 75 rpm until the material was completely dissolved, slowly added an initiator to the remaining water, made into an initiator solution, added an intermediate reaction solution, stirred a...

Embodiment 2

[0043] Preparation process of fluid loss reducer:

[0044] Formula 2: 26.1 grams of N-(3-dimethylaminopropyl) methacrylamide, 20.3 grams of methacryloyloxyethyltrimethylammonium chloride, 14.8 grams of 2-acrylamido-2-methylpropane Sulfonic acid, 0.8 grams of acrylic acid, 0.5 grams of ammonium persulfate, 146 grams of water.

[0045] 1. Preparation method of Agent A: Weigh the quality of each component for later use, add some water to the reaction kettle, and then add 26.1 grams of N-(3-dimethylaminopropyl) methacrylamide and 14.8 grams of 2-propylene Amino-2-methylpropanesulfonic acid, stir until the material is completely dissolved, add an inorganic base to adjust the pH to 8, then add 20.3 grams of methacryloyloxyethyltrimethylammonium chloride component and 0.8 gram of acrylic acid, stirred at a speed of 75 rpm until the material was completely dissolved, slowly added an initiator to the remaining water, made into an initiator solution, added an intermediate reaction solu...

Embodiment 3

[0054] Preparation process of fluid loss reducer:

[0055] Formula 3: 28.6 grams of N-(3-dimethylaminopropyl) methacrylamide, 23.4 grams of methacryloyloxyethyltrimethylammonium chloride, 17.4 grams of 2-acrylamido-2-methylpropane Sulfonic acid, 0.9 grams of acrylic acid, 0.6 grams of ammonium persulfate, 155 grams of water.

[0056] 1. Preparation method of Agent A: Weigh each component for later use, add some water to the reaction kettle, and then add 28.6 grams of N-(3-dimethylaminopropyl) methacrylamide and 17.4 grams of 2-propylene Amino-2-methylpropanesulfonic acid, stir until the material is completely dissolved, add an inorganic base to adjust the pH to 8, then add 23.4 grams of methacryloyloxyethyltrimethylammonium chloride component and 0.9 gram of acrylic acid, stirred at a speed of 75 rpm until the material was completely dissolved, slowly added an initiator to the remaining water, made into an initiator solution, added an intermediate reaction solution, stirred a...

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Abstract

The invention relates to a fluid loss reducer suitable for aluminate cement slurry and a preparation method thereof. The fluid loss reducer includes agent A and agent B. Agent A is composed of N‑(3‑dimethylaminopropyl) methacrylamide, methacryloyloxyethyltrimethylammonium chloride, 2‑acrylamide A tetrapolymer of 2-methylpropanesulfonic acid and acrylic acid polymerized by free radical aqueous solution, the second agent is titanium dioxide, mix the first agent and the second agent according to the mass ratio of 5~10:1, and then pulverize and surface modification, then microwave surface treatment, filtration, and drying to form a fluid loss reducer. The invention is reliable in principle and easy to operate, and the prepared fluid loss reducer can effectively control the fluid loss of aluminate cement slurry, is suitable for cementing engineering of heavy oil thermal recovery wells, and has broad market application prospects.

Description

technical field [0001] The invention relates to a fluid loss reducer for cement slurry in the well cementing process in the field of petroleum exploration and development and a preparation method thereof, in particular to a fluid loss reducer suitable for aluminate cement slurry and a preparation method thereof. Background technique [0002] In the field of traditional oil and gas well cementing, the cementing process is to put the casing into the borehole, and then seal the annular space between the casing and the borehole with cement slurry, the purpose of which is to keep the casing in place, support and protect Casing prevents formation fluid from flowing between layers. Well cementing operation is an important part of drilling engineering, not only during drilling, but also during all remaining production periods is a critical and challenging operation. Heavy oil resources are widely distributed in my country, and thermal oil recovery methods (steam huff and puff, stea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C08F220/60C08F220/34C08F220/58C08F220/06C09K8/487
CPCC04B40/0046C09K8/487C08F220/60C04B2103/46C08F220/34C08F220/585C08F220/06C04B24/2688C04B22/06C04B22/085C04B24/126C04B24/026C04B24/06
Inventor 张弛陈勋靳建洲肖云峰于永金刘明涛曲从锋李明王斐齐奉忠张华刘子帅刘慧婷夏修建郭玉超丁志伟周崇峰张晓兵
Owner CNPC DRILLING RES INST