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Dissolution system for accelerating dissolution speed of hydrophobic associated polymers as well as method and application thereof

A technology of hydrophobic association and dissolution speed, which is applied in the direction of drilling compositions, chemical instruments and methods, etc. It can solve the problems of affecting solution injection performance, inability to dissolve solid powder, poor solubility of hydrophobic association polymers, etc., and achieve shortening The effect of preparation time, improvement of dissolution rate, and improvement of efficiency

Inactive Publication Date: 2019-10-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of this molecular interaction are macroscopically manifested by the poor solubility of the hydrophobic association polymer. At room temperature and below, the solid powder cannot be dissolved, and there are many micellar insolubles, which seriously affect the injection performance of the solution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare a sodium chloride solution with a salinity of 5000 mg / L, add surfactant DWS to the sodium chloride solution to make the concentration 100 mg / L, and add hydrophobic association polymer APP5 under stirring at 30°C , the amount of polymer added to make its concentration 3000mg / L, and the dissolution time of APP5 was determined to be 4.5h.

Embodiment 2

[0031] Prepare a sodium chloride solution with a salinity of 5000mg / L, add surfactant DWS to the sodium chloride solution to make the concentration 150mg / L, and add hydrophobic association polymer APP5 under stirring at 30°C , the amount of polymer added to make its concentration 3000mg / L, and the dissolution time of APP5 was determined to be 4.5h.

Embodiment 3

[0033] Prepare a sodium chloride solution with a salinity of 5000 mg / L, add surfactant DWS to the sodium chloride solution to make the concentration 200 mg / L, and add hydrophobic association polymer APP5 under stirring at 30°C , the amount of polymer added to make its concentration 3000mg / L, and the dissolution time of APP5 was determined to be 4h.

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PUM

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Abstract

The invention belongs to the technical field of oil field development, and concretely provides a dissolution system for accelerating the dissolution speed of hydrophobic associated polymers as well asa method and application thereof. The dissolution system comprises surfactants, salt and water, wherein the surfactants are nonionic Gemini surfactants. The dissolution system is used in the preparation of hydrophobic associated polymer mother liquid; through the mutual action between hydrophobic groups and the surfactants in the dissolution system, the dissolution speed of the hydrophobic associated polymers can be obviously accelerated; the preparation time is shortened; the ground preparation and injection process efficiency of the polymer oil displacement is improved.

Description

technical field [0001] The invention belongs to the technical field of oil field development, and in particular relates to a dissolution system and a method for increasing the dissolution rate of hydrophobically associated polymers, and the application of the method in polymer flooding technology. Background technique [0002] Most of the oilfields developed in my country have entered the development stage of high water cut and high recovery degree, and chemical flooding is the leading technology to further improve oilfield recovery. The viscosity of the oil displacement system is a core parameter of the chemical flooding technology. The mechanism of action is to increase the viscosity of the displacement fluid, increase its seepage resistance in the porous medium of the formation, play a role in fluidity control, and expand the swept volume, thereby improving recovery. yield. In the early days, the viscosity of the oil displacement system was increased by adding partially ...

Claims

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Application Information

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IPC IPC(8): C09K8/58C09K8/588
CPCC09K8/58C09K8/588
Inventor 许关利王友启马涛周国华刘平卢刚谭中良
Owner CHINA PETROLEUM & CHEM CORP
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