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A kind of cross-linked polymer oil displacing agent synthesized by teramine and its preparation method

An oil displacing agent and a cross-linked technology, which is applied in the field of partially branched and partially cross-linked polymer oil displacing agents and their preparation, and can solve the problems of regulating permeability, unfavorable heterogeneous formations, poor adaptability of heterogeneous formations, etc. , to achieve the effects of good elasticity and shear resistance, good suspension performance, and efficient profile adjustment

Active Publication Date: 2017-12-22
RES INST OF PETROLEUM EXPLORATION & DEV SHENGLI OILFIELD CO LTD SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under high-temperature, high-salt and severe heterogeneity reservoir conditions, the polymer solution formed by HPAM has poor plugging ability for high-permeability formations, which is not conducive to effectively adjusting permeability in heterogeneous formations, and HPAM is seriously aging , the viscosity drops sharply, poor adaptability to heterogeneous formations, and it is difficult to meet the requirements of enhanced oil recovery

Method used

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  • A kind of cross-linked polymer oil displacing agent synthesized by teramine and its preparation method
  • A kind of cross-linked polymer oil displacing agent synthesized by teramine and its preparation method
  • A kind of cross-linked polymer oil displacing agent synthesized by teramine and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of solution

[0049] Dissolve 100 parts of acrylamide in 180 parts of deionized water to make a solution, dissolve 0.104 parts of pentamethyldiethylenetriamine in 40 parts of deionized water to make a solution, and dissolve 0.05 parts of potassium persulfate in 50 parts of deionized water. Deionized water is made into a solution, and 0.03 parts of sodium bisulfite is dissolved in 30 parts of deionized water to make a solution;

[0050] (2) Preparation of oil displacement agent by polymerization reaction

[0051] Add the acrylamide solution and the pentamethyldiethylenetriamine solution prepared in step (1) into the reactor in sequence, and remove the oxygen in the reactor and the reaction solution by passing nitrogen at a temperature of 12°C for 15 minutes while stirring, and then add in sequence Potassium persulfate solution and sodium bisulfite solution initiate the polymerization reaction. After the reaction is polymerized until the viscosity of the ...

Embodiment 2

[0055] (1) Preparation of solution

[0056] Dissolve 100 parts of acrylamide in 180 parts of deionized water to make a solution, dissolve 0.025 parts of pentamethyldiethylenetriamine in 40 parts of deionized water to make a solution, and dissolve 0.05 parts of potassium persulfate in 50 parts of deionized water. Make a solution in deionized water, and dissolve 0.05 parts of sodium bisulfite in 50 parts of deionized water to make a solution;

[0057] (2) Preparation of oil displacement agent by polymerization reaction

[0058] Add the acrylamide solution and the pentamethyldiethylenetriamine solution prepared in step (1) into the reactor in sequence, and remove the oxygen in the reactor and the reaction solution by passing nitrogen at a temperature of 12°C for 15 minutes while stirring, and then add in sequence Potassium persulfate solution and sodium bisulfite solution initiate the polymerization reaction. After the reaction is polymerized until the viscosity of the system in...

Embodiment 3

[0062] (1) Preparation of solution

[0063] Dissolve 100 parts of acrylamide in 180 parts of deionized water to make a solution, dissolve 0.073 parts of pentamethyldiethylenetriamine in 40 parts of deionized water to make a solution, and dissolve 0.05 parts of potassium persulfate in 50 parts of deionized water. Make a solution in deionized water, and dissolve 0.04 parts of sodium bisulfite in 50 parts of deionized water to make a solution;

[0064] (2) Preparation of oil displacement agent by polymerization reaction

[0065] Add the acrylamide solution and the pentamethyldiethylenetriamine solution prepared in step (1) into the reactor in sequence, and remove the oxygen in the reactor and the reaction solution by passing nitrogen at a temperature of 12°C for 15 minutes while stirring, and then add in sequence Potassium persulfate solution and sodium bisulfite solution initiate the polymerization reaction. After the reaction is polymerized until the viscosity of the system in...

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Abstract

The invention discloses a cross-linked polymer flooding agent adopting triamine participating in synthesis and a preparation method of the cross-linked polymer flooding agent. Raw material components of the cross-linked polymer flooding agent mainly comprise acrylamide, potassium persulfate, sodium bisulfite and pentamethyldiethylenetriamine. The preparation method of the cross-linked polymer flooding agent comprises the following steps: each raw material component is dissolved in deionized water no less than 1.0 time in parts by mass of the formula ratio of the component, and the solution of the component is prepared; an acrylamide solution and an pentamethyldiethylenetriamine solution are added to a reactor, nitrogen is introduced during stirring at 10-30 DEG C to remove oxygen in the reactor, an potassium persulfate solution and a sodium bisulfite solution are added, nitrogen introducing and stirring are stopped when a reaction system starts polymerization and the viscosity is improved greatly, the polymerization reaction is performed until the temperature is constant, and the colloidal flooding agent is prepared. The cross-linked polymer flooding agent has good usability, ageing resistance, temperature resistance and salt tolerance.

Description

technical field [0001] The invention relates to the technical field of polymer material oil displacement agents, in particular to a partially branched and partially crosslinked polymer oil displacement agent and a preparation method thereof. Background technique [0002] According to the different stages of oilfield development, oil exploitation is generally divided into three stages: the primary oil recovery using the energy of the oil layer to extract oil, the oil recovery efficiency of this stage is generally only about 15%; the energy of the oil layer is replenished by injecting water and gas into the oil layer to achieve The purpose of mining is secondary oil recovery, and the oil recovery rate is 30-40%; the stage of crude oil extraction through new technologies such as physics, chemistry, and biology is tertiary oil recovery. In order to efficiently extract the residual oil in the formation, it is urgent to develop a tertiary oil recovery method suitable for the speci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/588C08F220/56C08F226/00
CPCC08F220/56C09K8/588C08F226/00
Inventor 曹绪龙黄光速宋新旺吴锦荣苏智青姜祖明李江波刘汉超王超
Owner RES INST OF PETROLEUM EXPLORATION & DEV SHENGLI OILFIELD CO LTD SINOPEC
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