Environment-friendly type high-performance water-based drilling fluid and preparation method thereof

A water-based drilling fluid, high-performance technology, applied in the field of drilling fluid, can solve the problems of being unable to be widely used and high cost, and achieve the alleviation of the contradiction between inhibition and slurry mixing, good lubricity, excellent rheology and thixotropy Effect

Inactive Publication Date: 2019-02-12
KARAMAY YOULIAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few water-based drilling fluids that can not only meet the increasingly stringent environmental protection requirements, but also reduce the cost of drilling fluids, and can meet the safe and fast drilling requirements of complex wells, extended-reach directional wells and horizontal wells. Synthetic drilling fluids developed abroad Although environmentally friendly drilling fluids such as base and methyl glucoside are non-toxic and biodegradable, they are expensive and cannot be widely used; for this reason, a set of environmentally friendly drilling fluids that meet environmental standards, acceptable cost and can meet the requirements of difficult and complex wells The environment-friendly high-performance water-based drilling fluid system for extended-reach directional wells and horizontal wells is imminent

Method used

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  • Environment-friendly type high-performance water-based drilling fluid and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Water and its components in parts by mass of water: 4% polyamine inhibitor, 17% compound formate, 0.8% polymer strong coating agent, 2% polymer fluid loss control agent, 0.8% compound ammonium Salt, 0.8% technical grade low viscosity carboxymethyl cellulose, 3% low fluorescent white asphalt, 0.5% biopolymer, 6% vegetable oil lubricant, 4% light calcium, 2% heavy calcium, 0.7% potassium hydroxide, heavy Crystal powder 120%;

[0024] Mix the above substances evenly by stirring.

Embodiment 2

[0026] Identical to embodiment 1 component and preparation method;

[0027] The polyamine inhibitor is an amino-terminated polyether with a molecular weight less than 1000;

[0028] The polymer strong coating agent is zwitterionic polymer strong coating agent emulsion YL-HP;

[0029] The compound ammonium salt is composed of hydrolyzed polyacrylonitrile ammonium salt as the main polymer, potassium polyacrylate, zwitterionic polymer fluid loss reducer, and polyacrylamide as auxiliary polymers;

[0030] The modified vegetable oil is obtained by settling waste vegetable oil for 24 hours, centrifuging to remove impurities, reacting with methanol and a catalyst at 90°C for 6 hours, adding non-ionic surfactant and high temperature resistant processor to modify after rectification.

[0031] The technical-grade low-viscosity carboxymethyl cellulose is prepared by reacting cotton fiber with sodium hydroxide to generate alkali cellulose, and then carrying out carboxymethylation with mo...

Embodiment 3

[0036] Water and components by mass parts of water: 2% bentonite slurry, 2% polyamine inhibitor, 12% compound formate, 0.5% polymer strong coating agent, 1% polymer fluid loss control agent, 0.5% compound ammonium salt, 0.5% technical grade low viscosity carboxymethyl cellulose, 2% low fluorescent white asphalt, 0.3% biopolymer, 4% vegetable oil lubricant, 2% light calcium, 1% heavy calcium, 0.5% Potassium hydroxide, barite powder 50%;

[0037] The bentonite slurry is put into water and mixed uniformly, and then left to stand for 8 hours to 24 hours, then the remaining substances are added, and the mixture is obtained by stirring and mixing uniformly.

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Abstract

The invention provides environment-friendly type high-performance water-based drilling fluid and a preparation method thereof and belongs to the field of drilling fluid. The environment-friendly typehigh-performance water-based drilling fluid is mainly prepared from water and components based on the mass fraction of the water: 0 to 2 percent of bentonite slurry, 2 to 4 percent of a polyamine inhibitor, 12 to 17 percent of composite formate, 0.5 to 0.8 percent of a polymer strong coating agent, 1 to 2 percent of a polymer filtrate loss reducer, 0.5 to 0.8 percent of compound ammonium salt, 0.5to 0.8 percent of technical-grade low-viscosity carboxymethyl cellulose, 2 to 3 percent of low-fluorescence white asphalt, 0.3 to 0.5 percent of a biological polymer, 4 to 6 percent of a vegetable oil lubricant, 2 to 4 percent of light calcium carbonate, 1 to 2 percent of heavy calcium carbonate, 0.5 to 0.7 percent of potassium hydroxide and 50 to 120 percent of barite powder. The invention provides the environment-friendly type high-performance water-based drilling fluid which has an inhibitive property and a lubrication property comparable to oil-based drilling fluid, acceptable cost and high environmental friendliness, and can meet safe and rapid drilling requirements of a high-difficulty complex well as well as a large-displacement directional well and horizontal well, and the preparation method of the environment-friendly type high-performance water-based drilling fluid.

Description

Technical field: [0001] The invention relates to an environment-friendly high-performance water-based drilling fluid and a preparation method thereof, belonging to the field of drilling fluids, in particular to an environment-friendly high-performance water-based drilling fluid and a preparation method thereof. Background technique: [0002] Drilling fluid is mainly used to carry cuttings from the bottom of the well to the surface and clean the bottom of the well in the initial stage of rotary drilling for oil production. It is also responsible for cooling and lubricating the drill bit and drill string, balancing the formation fluid pressure, the side pressure of the rock on the well wall, etc. It is the blood of drilling; water-based drilling fluid is a sol-suspension mixed system with water as the dispersion medium and clay (bentonite), weighting agent and various chemical treatment agents as the dispersion phase. , clay, weighting agent and various chemical treatment agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24C09K2208/34
Inventor 刘祥国芮长山刘永熹王长征夏超平李小刚
Owner KARAMAY YOULIAN IND
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