Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sulfonate surfactant suitable for weak-alkali ternary compound oil displacement and application of sulfonate surfactant

A technology of surfactant and ternary compound, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problem of strong alkali damage to the formation, and achieve controllable product composition, good thermal stability, and excellent preparation process. simple effect

Active Publication Date: 2015-06-10
HEILONGJIANG SHINEWELL CHEM CO LTD
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a kind of sulfonate surfactant suitable for weak base three-way compound flooding, this kind of sulfonate surfactant suitable for weak base three-way compound flooding is used to solve the existing three-way compound Another object of the present invention is to provide the application of this kind of sulfonate surfactant suitable for weak alkali three-way compound flooding

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sulfonate surfactant suitable for weak-alkali ternary compound oil displacement and application of sulfonate surfactant
  • Sulfonate surfactant suitable for weak-alkali ternary compound oil displacement and application of sulfonate surfactant
  • Sulfonate surfactant suitable for weak-alkali ternary compound oil displacement and application of sulfonate surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This kind of sulfonate surfactant suitable for weak base ASP flooding is made of C 12 ~C 24 Alkylaryl compounds, C 20 ~C 28 After mixing the mixed α-olefins, carry out sulfonation reaction, aging hydrolysis, then add alcohol, and then neutralize. Alkylaryl sulfonate and α-alkenyl sulfonate, wherein the average equivalent weight of alkylaryl sulfonate is 400~500, the specific preparation method is as follows:

[0019] ⑴ Choose alkylbenzene, C with an average molecular weight of 310 20 ~C 28 Mixed α-olefins, mixed as raw materials for sulfonation, wherein the weight percentage of alkylbenzene is 50%~90%, C 20 ~C 28 The weight percentage of mixed α-olefins is 10%~50%; (2) Sulfonation reaction: use falling film sulfonator to carry out sulfonation reaction on the above mixed sulfonation raw materials, the reaction process conditions are: the molar ratio of reaction raw materials is 1. 0~2.0:1, sulfonation reaction temperature is 30℃~80℃, SO 3 The gas concentration i...

Embodiment 2

[0022] The specific preparation method of this sulfonate surfactant suitable for weak base three-component compound flooding is as follows:

[0023] ⑴Choose alkylxylene and C with an average molecular weight of 310 20 ~C 28 Mixed α-olefins, mixed as raw materials for sulfonation, wherein the weight percentage of alkylxylene is 65%~85%, C 20 ~C 28 The weight percentage of mixed α-olefins is 15%~35%; (2) Sulfonation reaction: use falling film sulfonator to carry out sulfonation reaction on the above mixed sulfonation raw materials, the reaction process conditions are: the molar ratio of reaction raw materials is 1.3~1.45:1, sulfonation reaction temperature is 45℃~55℃, SO 3The gas concentration is 4.0 g / L ~4.5 % g / L, the total amount of protective air volume is controlled at 2000 L / h, the ratio of primary air to secondary air is 500 / 1500L / h~600 / 1400L / h; the molar ratio of reaction raw materials for SO 3 The molar ratio with the mixed sulfonated raw material;

[0024] (3) A...

Embodiment 3

[0026] It is suitable for performance experiments of sulfonate surfactants used in weak base ASP flooding.

[0027] Utilize the sulfonate surfactant suitable for weak base three-way compound oil flooding prepared in Example 1, prepare the weak base three-way compound system as shown in Table 1, the method is: surfactant (effective concentration) and alkali All were first prepared into 5 wt% mother liquor. The polymer is prepared into a 5000 mg / L solution by advanced treatment sewage. When preparing the polymer solution, it is stirred for 2-3 hours at a speed of 1000 RPM, and matured for 12 hours. When preparing the ternary system, dilute the 5000 mg / L solution with sewage to the corresponding concentration. When preparing the ternary system, according to the principle that the lesser amount is added first and the surfactant and alkali should be added separately, the order of adding various chemical agents should be: surfactant-polymer-sewage-alkali. Weighing should be accura...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a sulfonate surfactant suitable for weak-alkali ternary compound oil displacement and an application of the sulfonate surfactant. The sulfonate surfactant suitable for weak-alkali ternary compound oil displacement is prepared by the following steps: selecting C12-C24 alkyl aryl compounds and C20-C28 mixed alpha-alkene of which the average molecular weight is 310, and mixing; sulfonation reaction: carrying out sulfonation reaction by virtue of a falling film evaporation sulfonator, wherein the molar ratio of the materials is (1.0-2.0) to 1; the sulfonation reaction temperature is 30-80 DEG C; the concentration of an SO3 gas is 2.0-6.0g / L; the total protective air is controlled to be 2,000L / h; the specific value of primary air to secondary air is 500 / 1500L / h to 600 / 1400L / h; ageing and neutralizing, adding 2.0%-4.0% of water to a sulfonated product at a sulfonation temperature, carrying out hydrolyzing and ageing for 0.5-1.5 hours; and adding alcohol, neutralizing with 20% alkali solution at 30-60 DEG C until the pH value is 8-9, so as to obtain the sulfonate surfactant suitable for weak-alkali ternary compound oil displacement. The sulfonate surfactant is small in damages to an oil reservoir, and low in corrosion and scaling on an oil well pipe and an oil well pump; and the oil recovery ratio can be improved by over 20% in comparison with that of water displacement.

Description

technical field [0001] The invention relates to a surfactant used in oil field tertiary oil recovery, in particular to a sulfonate surfactant suitable for weak alkali three-component compound oil flooding and its application. Background technique [0002] Alkyl aryl sulfonate is a well-recognized surfactant for oil displacement at home and abroad, and it is mainly used in the composite flooding technology of oil field tertiary oil recovery. ASP flooding (that is, alkali-surfactant-polymer three chemical agent systems) can better enhance oil recovery through the combination of chemical agents and their synergistic effects, and has been carried out in Daqing, Shengli and Xinjiang oilfields On-site pilot test, the recovery rate increased by more than 20%. Combination flooding technology has become a cost-effective tertiary oil recovery technology method. Surfactants play an important role in tertiary oil recovery. It mainly achieves the purpose of enhancing oil recovery by r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 徐立波闫喜林
Owner HEILONGJIANG SHINEWELL CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com