Multiple-effect viscosity depressant for exploiting thickened oil

A technology of viscosity reducer and viscous oil, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of difficult to control emulsion stability, poor biochemical degradation performance, and large amount of water, and achieve moderate stability. , the effect of improved recovery and strong salt resistance

Active Publication Date: 2011-04-20
成都川大金钟科技有限公司
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Problems solved by technology

However, most of the emulsified viscosity reducers currently developed also have problems such as 1) large amount of wat

Method used

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  • Multiple-effect viscosity depressant for exploiting thickened oil
  • Multiple-effect viscosity depressant for exploiting thickened oil

Examples

Experimental program
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Example Embodiment

[0024] Example

[0025] 1. The mass ratio is 8% iron gluconate, 5% ethyl acrylate and butyl acrylate block polymer, 10% sodium N-lauroyl sarcosinate, 25% petroleum ether, and 52% water. Mix and stir these several raw materials to obtain a multi-effect viscosity reducer for heavy oil exploitation. Karamay Oilfield was used for heavy oil viscosity reduction test, and the viscosity reduction rate reached 98%

[0026] 2. The mass ratio is 10% iron gluconate, 10% ethyl acrylate and butyl acrylate block polymer, 15% sodium N-lauroyl sarcosinate, 30% mixed benzene and 35% water. Mix and stir these several raw materials to obtain a multi-effect viscosity reducer for heavy oil exploitation. Through the heavy oil viscosity reduction test 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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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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