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Drilling fluid filtrate reducer and preparation method thereof

A fluid loss control agent, drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., to achieve good rheology, good dispersibility, and low environmental hazards.

Inactive Publication Date: 2016-07-06
WEIFANG TIANFU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patent applications have improved the fluid loss control effect of the fluid loss control agent, and the rheology and high temperature resistance of the drilling fluid have also been improved, but the fluid loss control, rheology and dispersibility still need to be further improved

Method used

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  • Drilling fluid filtrate reducer and preparation method thereof

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preparation example Construction

[0027] A kind of drilling fluid fluid loss reducer its preparation method comprises the following steps:

[0028] 1) Add a certain amount of solvent and organic amine into the reaction kettle, stir and heat to 25~65℃, react for 0.5~2h, and obtain the first mixed solution;

[0029] 2) Add the natural or modified mixture to the first mixed solution obtained in step 1, and control the temperature in the reactor to 20-60°C, stir and react for 2-8 hours to obtain the second mixed solution;

[0030] 3) Filter the second mixed solution obtained in step 2, and wash it with 0.5 times the volume of methanol of the second mixed solution, control the drying temperature at 60-110°C, the drying time for 1-5 hours, and control the high-temperature cracking temperature at 180-220°C, High temperature pyrolysis for 10~25h to obtain the semi-finished product of fluid loss control agent;

[0031] 4) Add additives to the semi-finished fluid loss control agent obtained in step 3, and stir for 0.5-...

Embodiment 1

[0032] Example 1: ①Add 32 parts of ethanol and 2 parts of N-cocoyl-1,3-propylenediamine into the reactor, stir and heat to 25°C, and react for 2 hours to obtain the first mixed solution; ②To the step 1 Add 10 parts of humic acid to the first mixed solution obtained, and control the temperature in the reactor to 20°C, stir and react for 8 hours to obtain the second mixed solution; ③Filtrate the second mixed solution obtained in step 2, and use Wash the second mixed solution with 0.5 times the volume of methanol, dry at 60°C, dry for 5 hours, control the high-temperature cracking temperature at 180°C, and crack at high temperature for 25 hours to obtain the semi-finished fluid loss additive; ④ add the semi-finished fluid loss additive obtained in step 3 to 2 parts of polyacrylamide and stirred for 0.5h to obtain the finished fluid loss control agent.

Embodiment 2

[0033] Example 2: ①Add 80 parts of methanol and 15 parts of triethylenetetramine into the reaction kettle, stir and heat to 65°C, and react for 0.5h to obtain the first mixed solution; ②Add to the first mixed solution obtained in step 1 32 parts of lignite, and control the temperature in the reactor to 60°C, stir and react for 2 hours to obtain the second mixed solution; ③ filter the second mixed solution obtained in step 2, and wash with 0.5 times the volume of the second mixed solution with methanol , dry at 110°C, dry for 1 hour, control the pyrolysis temperature at 220°C, and pyrolyze at high temperature for 10 hours to obtain the semi-finished fluid loss control agent; ④ add 5 parts of hydroxymethylcellulose to the semi-finished fluid loss control agent obtained in step 3, and stir After 1 hour, the finished fluid loss additive was obtained.

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Abstract

The invention relates to drilling fluid filtrate reducer.The drilling fluid filtrate reducer comprises, by weight, 10-32 parts of a natural or modified mixture, 2-15 parts of organic amine, 2-5 parts of additives and 32-80 parts of solvent.The invention further discloses a preparation method of the drilling fluid filtrate reducer.Compared with the prior art, the drilling fluid filtrate reducer can form thermostable emulsion with emulsifier under the condition that a small amount of the organic amine, the natural or modified mixture and the additives are added, temperature resistance reaches 200-230 DEG C, good dispersive capacity is achieved in oil, meanwhile, certain functions of dilution, viscosity reduction, emulsification assisting and the like are achieved, a mud system can have a good rheological property, the addition amount is small, harm to the environment is small, and in addition, the drilling fluid filtrate reducer can resist to high temperature.

Description

technical field [0001] The invention relates to a fluid loss reducer for drilling fluid, and also relates to a preparation method of the fluid loss reducer for drilling fluid. Background technique [0002] Oil-based drilling fluids are more and more widely used in drilling deep and ultra-deep wells, high-inclination directional wells, Complex formation wells such as lateral wells and horizontal wells. As a key component in the oil-based drilling fluid system, fluid loss reducer is mainly used to make the drilling fluid form a thin and dense mud cake under the well wall, reduce fluid loss, maintain wellbore stability and reduce the liquid-solid phase of the drilling fluid. It is one of the indispensable treatment agents to invade the formation and damage the oil and gas layers. [0003] The main components that play a role in reducing fluid loss in oil-based drilling fluids are fine solid particles, emulsified droplets and colloid treatment agents. First of all, when the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035
Inventor 李川李奎刘志山
Owner WEIFANG TIANFU CHEM TECH
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