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Multiple-effect viscosity depressant for exploiting thickened oil

A technology of viscosity reducer and heavy oil, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficult control of emulsion stability, poor biochemical degradation performance, and difficult treatment, so as to achieve easy follow-up treatment, Improved recovery and strong broad-spectrum adaptability

Active Publication Date: 2012-04-18
成都川大金钟科技有限公司
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AI Technical Summary

Problems solved by technology

However, most of the emulsified viscosity reducers currently developed also have problems such as 1) large amount of water; 2) difficulty in controlling the stability of the emulsion; 3) corrosion problems; 4) difficult follow-up processing;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] 1. According to the mass ratio, it is 8% iron gluconate, 5% block polymer of ethyl acrylate and butyl acrylate, 10% sodium N-lauroyl sarcosinate, 25% petroleum ether, and 52% water. The several raw materials are mixed and stirred to obtain a multi-effect viscosity reducer for heavy oil recovery. Using Karamay Oilfield as a viscosity reduction test for heavy oil, the viscosity reduction rate reached 98%

[0030] 2. According to the mass ratio, it is 10% of iron gluconate, 10% of block polymer of ethyl acrylate and butyl acrylate, 15% of sodium N-lauroyl sarcosinate, 30% of mixed benzene, and 35% of water. The several raw materials are mixed and stirred to obtain a multi-effect viscosity reducer for heavy oil recovery. Passed the viscosity reduction test of heavy oil in Karamay Oilfield, the viscosity reduction rate reached 98%

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Abstract

The invention relates to a multiple-effect viscosity depressant for exploiting thickened oil. The multiple-effect viscosity depressant is prepared from the following raw materials in percentage by weight: 5-15 percent of hexose salt, 5-15 percent of polyacrylic ester, 5-15 percent of N-sodium lauroyl sarcosine, 10-30 percent of petroleum ether or mixed benzene and the balance of water. The product of the invention is a white emulsion at room temperature under normal pressure, has stable performance and can be stored for a long time. Before use, the product is diluted 20-30 times and added to an oil well to achieve the aim of reducing viscosity and increasing the yield of the thickened oil.

Description

[0001] Technical field: The present invention is a special composition for oilfield chemistry, which is a multi-effect oil well treatment agent suitable for heavy oil exploitation and production increase, and belongs to the production field of special chemicals for oilfield chemistry. Background technique: [0002] Due to the high content of colloidal asphaltene, heavy oil has a very high viscosity, and the viscosity of super heavy oil can reach more than 50000mPa·s (50°C). Various intermolecular forces are formed, coalescing together, small molecule hydrocarbons, etc. are wrapped in it, so that the viscosity of heavy oil is very high. The exploitation of heavy oil is very difficult. In order to increase the production of heavy oil, reduce the cost of production, and increase the recovery factor, the main point of view is to reduce the viscosity of heavy oil. [0003] At present, the vast majority of heavy oil production in China adopts the steam stimulation method (a type of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/588C09K8/524
Inventor 解勇卢云陈天朗肖慎修
Owner 成都川大金钟科技有限公司
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