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Preparing shift drive agent of self cross-linked polymer, and application method

A technology for regulating and displacing agents and polymers, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of easy hydrolysis of polymers, poor rheological properties, and poor use effects, so as to improve the sweep coefficient, drive Effect of oil effect improvement, good potency

Inactive Publication Date: 2007-07-25
中国石化股份胜利油田分公司孤岛采油厂
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Problems solved by technology

However, ordinary polyacrylamide has disadvantages such as poor use effect and short validity period when used in medium-temperature high-salt and high-temperature high-salt oil reservoirs. The main reason is that at high temperature and high salinity, the polymer is easily hydrolyzed, the viscosity decreases, and the rheology becomes poor. , so it needs to be further improved in use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] Field Application of GD1-11-705 Polymer Injection Well Profile Control

[0038] 1. Basic overview

[0039] Well Zhong 11-705 was transferred to polymer injection on March 21, 2004. The control and flooding working fluid was prepared by adding 1% mass percent control and flooding agent to the sewage, and 1500mg / L chromium acetate catalyst was injected into the water injection wellhead. The polymer injection layers were 52 and 53+ 4. Transferred to the second slug on October 9, 2005. As of April 2006, the cumulative injection of polymer solution is 6.6610X104m3, the current injection concentration is 2100mg / l, the oil pressure is 7.10Mpa, the daily injection is 50m3, and the actual injection is 50m3. After Zhong 11-705 was transferred to poly, the injection pressure fluctuated and the pressure increased by about 1Mpa.

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Abstract

This invention discloses a method for preparing self-crosslinking polymer profile control agent, which is prepared from acrylamide, cationic monomer DMC, self-crosslinking monomer carboxymethyl acrylamide and water at a weight ratio of (9.07-12.38) : (0.09-0.64) : (2.53-5.29) : (83-86). The method comprises: adding initiator 50 mg / L to the above raw materials at 28-32 deg.C, and copolymerizing for 10-13 h. The crosslinking time of self-crosslinking groups and amide groups in the prepared self-crosslinking polymer is adjustable, thus the formed gel can realize profiles control, and has raised sweep coefficient.

Description

1. Technical field [0001] The invention relates to a self-crosslinking polymer control and flooding technology method suitable for oil field deep control and flooding to improve the recovery rate of oil fields (especially oil fields after polymer flooding), in particular to self-crosslinking polymer control and flooding agents for deep control and flooding. The preparation and application method of the flooding agent is suitable for high water-cut oilfields, polymer flooding high poly well groups, and oil field control and flooding applications after polymer flooding, and belongs to the field of petroleum development. 2. Background technology [0002] With the development of oil extraction technology, especially the application of new technologies for enhanced oil recovery in recent years, polymer flooding technology occupies a very important position in the methods of enhanced oil recovery (EOR). Therefore, my country Polymer flooding technology has been widely used in major...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/60
Inventor 肖建洪曹正权陈辉姜娜杨金荣
Owner 中国石化股份胜利油田分公司孤岛采油厂
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