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Formulation of surfactant oil displacement system for anionic and nonionic oil displacement

A technique of surfactant flooding, anion and non-ion, which is applied in the direction of drilling composition, chemical instruments and methods, etc., and can solve the problems of large pores and channeling layers, water flooding of oil layers, and poor water flooding effect, etc. problems, to achieve the effect of good promotion prospects, strong reservoir adaptability and high oil displacement efficiency

Active Publication Date: 2010-05-12
DESHI ENERGY TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, most of the early-developed oil fields have entered the high water-cut or ultra-high water-cut period, with large pores and serious channeling, prominent interlayer contradictions, water flooding of oil layers, and further deterioration of water flooding effect
The outstanding contradiction of low oil recovery in water flooding, channeling of injected water along large pores and high permeability layers, and premature water flooding of oil wells seriously restrict crude oil production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] C18 sodium alkylbenzene sulfonate 18%, C16 fatty acid C2 alkanolamide 25%, C8 alkylphenol polyoxyethylene ether phosphate 7%, ethanol 17%, octanol 3%, water 30%.

[0018] Add C18 sodium alkylbenzene sulfonate, C16 fatty acid C2 alkanolamide, and C8 alkylphenol polyoxyethylene ether phosphate into the reactor in proportion, add ethanol and stir for 30 minutes, add octanol, slowly add water in batches, and stir evenly . The product is yellow homogeneous liquid with good water solubility, 50% solid content and pH=8-10.5.

example 2

[0020] C12 Sodium Alkylbenzene Sulfonate 22%, C14 Sodium Olefin Sulfonate 13%, C12 Fatty Alkanolamide Phosphate 8%, C12-C14 Fatty Alcohol Polyoxyethylene Ether Phosphate 12%, Ethanol 20%, Propanol 5% , Water 20%.

[0021] Add C12 sodium alkylbenzene sulfonate, C14 sodium olefin sulfonate, C12 fatty alkanolamide phosphate, C12-C14 fatty alcohol polyoxyethylene ether phosphate into the reactor in proportion, add ethanol and propanol and stir for 30 minutes, add water, stir well. The product is a light yellow homogeneous liquid with good water solubility, a solid content of 55%, and a pH of 7.5-10.

example 3

[0023] C12 sodium alkylbenzene sulfonate 25%, C18 alkyl sulfonate sodium 10%, C9 alkylphenol polyoxyethylene ether 25%, ethanol 15%, propanol 5%, water 20%.

[0024] Add sodium C12 alkylbenzene sulfonate, sodium C18 alkyl sulfonate, and C9 alkylphenol polyoxyethylene ether-10 into the reactor in proportion, add ethanol and propanol and stir for 30 minutes, add water, and stir evenly. The product is light yellow homogeneous liquid with good water solubility, solid content of 60%, pH=7.5-9.

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Abstract

The invention provides a composition of a surfactant oil displacement system for anionic and nonionic oil displacement. The composition consists of 18% C18 sodium alkyl benzene sulfonate, C16 fatty acid, 25% C2 alkanolamide, 7% C8 alkylphenol polyoxyethylene ether phosphate, 17% ethanol, 3% octanol, 30% water; the alkyl is a hydrocarbyl group with linear chain, branched chain and ring structures in a calibrated carbon atom range, and also can be substituted by one or more halogens, alkyls or alkoxys; the sodium sulfonates are formed by sulfonating different alkanes or arenes by SO3 or chlorosulfonic acid in chloroalkane environment and then neutralizing the sulfonate and sodium hydroxide; and the esterification derivatives are sulfates or phosphates. The formulation has highoil displacement efficiency, strong oil deposit adaptability and good popularization prospect.

Description

Technical field [0001] The invention provides a formulation of a surfactant oil displacement system for anion and non-ion oil displacement, and belongs to the field of oil field chemical production. Background technique [0002] In recent years, with the rapid development of crude oil in various oilfields, the demand for enhanced oil recovery has become more and more prominent, and new tertiary oil recovery technologies and new oil displacement technologies after tertiary recovery have received more and more attention. In the past, large-scale injection of polymer polyacrylamide was used in tertiary oil recovery to increase the viscosity coefficient of water flooding to enhance oil recovery. However, with the injection of a large amount of polymers, the pressure of the formation increases, the difficulty of injection increases, and the formation is seriously damaged. Therefore, the development and application of enhanced oil recovery technology after polymer flooding, as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/88
Inventor 孙永强谷之辉郭鑫刘小芳
Owner DESHI ENERGY TECH GRP CO LTD
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