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

A kind of polymer surfactant binary composite oil displacement agent

A surfactant, binary compound flooding technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of large-scale application, high cost of surfactants and polymers, and achieve good cleaning. Oil efficiency, good viscosity retention, mild effects

Inactive Publication Date: 2015-12-02
SOUTHWEST PETROLEUM UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has been tested abroad (mostly in the United States) and domestically (such as Daqing Oilfield), and has been technically successful, but it cannot be used on a large scale due to the high cost of chemical agents such as surfactants and polymers. application
[0005] Domestic scholars have studied the properties of the polymer surfactant binary composite oil displacement agent system solution, the rheology of the interface, the interface viscosity, etc. (Guo Yongjun et al. Viscosity characteristics of polymer surfactant mixed solution [J]. Production Technology, 1999, 21(4).); (Ye Zhongbin et al. Study on the interface properties of polymer and surfactant binary flooding system [J]. Oil and Gas Geology and Recovery, 2002, 9(3).); (Ye Zhongbin et al. Research on interfacial rheology of polymer surface binary flooding system[J]. Southwest Petroleum Institute Journal. 2002, 24(6).), but there are still relatively few reports on field experiments, especially for high temperature and high There are even fewer reports on salinity reservoirs

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
  • A kind of polymer surfactant binary composite oil displacement agent
  • A kind of polymer surfactant binary composite oil displacement agent
  • A kind of polymer surfactant binary composite oil displacement agent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] Another object of the present invention is to provide a kind of synthetic method of polymer surfactant binary composite oil displacement agent, and this synthetic method comprises the following steps:

[0047] Step 1: Using acrylamide AM, N-vinylpyrrolidone NVP, and sodium allyl sulfonate AS as reactive monomers, a polymer with temperature and salt resistance is synthesized by free radical polymerization under the trigger of a redox initiation system ;

[0048] In step 2, petroleum carboxylate and carboxybetaine are compounded in a certain proportion to form a surfactant system;

[0049] Step 3, the compounded surfactant and a certain concentration of the above-mentioned polymers are used to form a polymer surfactant binary composite oil displacement agent.

[0050] In the embodiment of the present invention, in step 1, using acrylamide AM, N-vinylpyrrolidone NVP, and sodium allyl sulfonate AS as reaction monomers, under the triggering of a redox initiation system, syn...

Embodiment 1

[0084] Embodiment 1: the preparation of polymer

[0085] Synthetic initiator water-soluble azobisisobutylamidine dihydrochloride (AIBA·2HCl):

[0086] Add anhydrous methanol and refined azobisisobutyronitrile into a four-neck flask, add a certain amount of sodium methoxide under stirring, stir for a certain period of time at 25°C, and react for 18 hours; then add a certain amount of NH 4 C1, continue to stir at this temperature for a certain period of time, react for 22 hours, stop the reaction and let it stand, filter the reaction solution, discard the precipitated NaCl, filter the filtrate under reduced pressure, remove the solvent methanol, and rinse the obtained solid with a small amount of cold methanol for 2-3 times, and then distilled under reduced pressure to obtain azobisisobutylamidine hydrochloride as a white solid.

[0087] Preparation of polymer

[0088] Weigh 16.79 grams of acrylamide (AM), 1.12 grams of N-vinylpyrrolidone (NVP), 0.09 grams of sodium allyl sulf...

Embodiment 2

[0089] Example 2: Structural Characterization of Polymers

[0090] Take a certain amount of the dry AM / NVP / AS polymer prepared in Example 1 and mix it with spectroscopically pure potassium bromide and grind it, press the mixed and ground sample into thin slices and fix it on the sample holder, and use an infrared spectrometer to analyze it. Spectral identification was carried out, and the results of infrared spectrum analysis are shown in Table 1.

[0091] Table 1 AM / NVP / AS polymer functional group characteristic peaks

[0092]

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

PropertyMeasurementUnit
viscosityaaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a polymer-surfactant dualistic compound oil-displacing agent and a synthetic method of the polymer-surfactant dualistic compound oil-displacing agent. The synthetic method comprises the steps that acrylamide (AM), N-vinyl pyrrolidone (NVP), sodium allysulfonate (AS) serve as reaction monomers and are initiated by a redox initiation system to synthesize a temperature-resistance and salt-resistance polymer by a free radical polymerization method; petroleum carboxylate and carboxyl betaine are compounded proportionally, and then mixed with the copolymer in certain concentration to form the polymer-surfactant dualistic compound oil-displacing agent. The polymer-surfactant dualistic compound oil-displacing agent is relatively low in interfacial tension, high in viscosity retention rate and good in temperature resistance and salt resistance under high temperature and hypersalinity conditions, can be used for high temperature and hypersalinity oil deposit, has high displacement efficiency on residual oil, and can increase oil recovery factor effectively; the preparation method is simple and feasible; the condition is mild; the yield is high; and the polymer-surfactant dualistic compound oil-displacing agent is high in popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a polymer surfactant binary composite oil displacement agent. Background technique [0002] Polymer flooding began in the 1950s, and the range of enhanced oil recovery can reach about 10%, which is a relatively mature technology. In the early 1980s, the research on the alkali / surfactant / polymer (ASP) ternary composite system rose rapidly. It is another new technology for enhancing oil recovery after polymers. Compared with polymers, the cost of chemical flooding is greatly reduced due to the small amount of surfactant added. my country has carried out pilot field tests of ASP flooding in Daqing Oilfield and Shengli Oilfield. Clark, Pitts, Smith (Clark, S.R. et al. Design and application of anal kaline-surfactant-polymer recovery system to the west Kiehl Field. Paper SPE17538 presented at the 1988 SPERocky Mountain Regional Meeting, Casper, WY, May 11-23.)...

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 Patents(China)
IPC IPC(8): C09K8/588C09K8/584C08F220/56C08F226/10C08F228/02
Inventor 赖南君叶仲斌董军张雪苟绍华舒政陈洪覃孝平
Owner SOUTHWEST PETROLEUM UNIV
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