Drilling fluid with synthesized substrate

A drilling fluid and synthetic-based technology, applied in drilling equipment and other directions, can solve the problems of unacceptable environment, biotoxicity, and difficult biodegradation, and achieve the effects of low environmental pollution, low solubility and high drilling speed.

Inactive Publication Date: 2005-08-31
CNOOC TIANJIN BRANCH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of horizontal drilling fluid technology, currently used drilling fluids include PEM drilling fluid, PRD drilling fluid and oil-based drilling fluid. Both PEM drilling fluid and PRD drilling fluid are water-based drilling fluids. Better, not suitable for well temperatures above 120□, oil-based drilling fluid can resist high temperature, but oil-based drilling fluid has the problem of poor fluidity under low temperature conditions, and is biologically toxic and difficult to biodegrade, making the environment unacceptable

Method used

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  • Drilling fluid with synthesized substrate

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Effect test

Embodiment 1

[0014] Embodiment one: at room temperature, to the 40M with high-speed stirring 3 Add 24T octyl 4,5,6 carbon dicarboxylate, 0.9T organic soil, 0.6T mixture of sulfonated lignite and sulfonated bitumen as fluid loss reducer, 0.9T fatty acid alcohol polyoxyethylene ether in the circulating pool A mixture of ammonium sulfate and nonylphenol polyoxyethylene ether as the main emulsifier, 0.9T of 2-oleyl-N-methyl-N-hydroxyethyl imidazoline quaternary ammonium salt, fatty amide polyvinyl ether and nonylphenol A mixture of polyoxyethylene ether as a co-emulsifier, a mixture of 600Kg of 2-alkyl-N-hydroxyethylimidazoline-2`-hydroxypropyl betaine and dodecyl dimethyl betaine As a wetting agent, 0.6T ethylene oxide-propylene oxide block copolymer is used as a flow regulator, after full stirring and shearing, then add 20% CaCl 2 Aqueous solutions of 6.0T and 10T limestone are used as weighting materials, and are fully circulated at room temperature for 6 hours to prepare synthetic-based d...

Embodiment 2

[0015] Embodiment two: at room temperature, to the 40M with high-speed stirring 3 Add 24T of octyl 4,5,6 carbon dicarboxylate, 0.8T of organic soil, 0.75T of a mixture of sulfonated lignite and sulfonated asphalt, 0.75T of fatty acid alcohol polyoxyethylene ether ammonium sulfate and nonylphenol into the circulating pool A mixture of polyoxyethylene ethers, 0.75T of 2-oleyl-N-methyl-N-hydroxyethyl imidazoline quaternary ammonium salt, a mixture of fatty amide polyvinyl ether and nonylphenol polyoxyethylene ether, 500Kg of 2 - A mixture of alkyl-N-hydroxyethylimidazoline-2`-hydroxypropanesulfonium salt and dodecyl dimethyl betaine salt, 0.8T ethylene oxide-propylene oxide block After the copolymer, after full stirring and shearing, add 20% CaCl 2 6.0T aqueous solution and 2T weighting material were fully circulated at room temperature for 6 hours to prepare synthetic-based drilling fluid. Adding ethylene oxide-propylene oxide block copolymer to the synthetic base drilling flu...

Embodiment 3

[0016] Embodiment three: at room temperature, to the 40M with high-speed stirring 3 Add 36T of octyl 4,5,6 carbon dicarboxylate, 0.9T of organic soil, 0.6T of a mixture of sulfonated lignite and sulfonated asphalt, 0.9T of fatty acid alcohol polyoxyethylene ether ammonium sulfate and nonylphenol into the circulating pool A mixture of polyoxyethylene ethers, 0.9T of 2-oleyl-N-methyl-N-hydroxyethyl imidazoline quaternary ammonium salts, a mixture of fatty amide polyvinyl ethers and nonylphenol polyoxyethylene ethers, 600Kg of 2 - A mixture of alkyl-N-hydroxyethylimidazoline-2`-hydroxypropanesulfonium salt and dodecyl dimethyl betaine salt, 0.6T ethylene oxide-propylene oxide block After the copolymer, after full stirring and shearing, add 20% CaCl 2 4.0T aqueous solution and 10T weighting material are fully circulated at room temperature for 6 hours to prepare synthetic base drilling fluid. Adding ethylene oxide-propylene oxide block copolymer to the synthetic base drilling fl...

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Abstract

A synthetic basic well-drilling liquid is proportionally prepared from the basic liquid composed of basic liquid and aqueous solution of CaCl2, primary emulsifier, secondary emulsifier, wetting agent, flowing regulator, filter loss reducer and organic earth through mixing. Its advantages are no pollution and high effect to protect oil-bearing stratum.

Description

technical field [0001] The invention relates to a drilling fluid, in particular to a synthetic base drilling fluid. Background technique [0002] With the development of horizontal drilling fluid technology, currently used drilling fluids include PEM drilling fluid, PRD drilling fluid and oil-based drilling fluid. Both PEM drilling fluid and PRD drilling fluid are water-based drilling fluids. Better, not suitable for well temperatures above 120□, oil-based drilling fluid can resist high temperature, but oil-based drilling fluid has the problem of poor fluidity under low temperature conditions, and it is biologically toxic and difficult to biodegrade, making the environment unacceptable. Contents of the invention [0003] The main purpose of the present invention is to overcome the above-mentioned shortcoming that existing product exists, and a kind of synthetic base drilling fluid (SBM) is provided, and it is the novel mud system of inverse emulsification suspension disper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 安文忠王权伟舒福昌
Owner CNOOC TIANJIN BRANCH
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