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Low-temperature deep gel profile-modification plugging agent and preparation method thereof

A profile control water plugging agent and gel technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve the long-term mobile blocking effect, dynamic water allocation, oil washing and oil carrying, and cannot adapt to large-dose deep adjustment in oilfields. To solve the problems of water cutoff and flood control, etc., to achieve the effect of increasing long-term stability and salt resistance, adjustable gel strength, and excellent chemical resistance

Inactive Publication Date: 2012-01-04
盘锦市庆联油田工程技术服务有限公司
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Problems solved by technology

It overcomes the mechanical clogging effect of the existing profile control water shutoff agent, the long-term mobile clogging effect, the dynamic deployment of water, the pressure wave oscillation effect, and the oil washing and oil carrying effect, but it cannot meet the needs of large-dose deep profile control water shutoff and control and displacement in oilfields. insufficient

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  • Low-temperature deep gel profile-modification plugging agent and preparation method thereof

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Embodiment Construction

[0011] The weight ratio of each component of the present invention is: polymer flocculant (molecular weight: 23-25 ​​million): 0.15%; dicyandiamide modified urea-aldehyde resin delayed cross-linking agent: 0.20%; industrial soda ash: 0.05%; Aminophenol: 0.015%; the rest is water, and the sum of the weight percentages of each component is 100%; wherein the mass ratio of each component of dicyandiamide modified urea aldehyde resin delayed crosslinking agent is: dicyandiamide: urea: Formaldehyde=1:6:42.

[0012] Take polymer flocculant (molecular weight 23-25 ​​million), dicyandiamide-modified urea aldehyde resin delayed cross-linking agent, industrial soda ash, m-aminophenol and water according to weight ratio, and polymer flocculant, dicyandiamide modified Urine-formaldehyde resin delayed cross-linking agent and water are mixed evenly, and then industrial soda ash and m-aminophenol are added, and the gel reaction temperature is controlled at 40°C, and the pH value of the so...

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Abstract

The invention relates to a plugging agent for oil field production, particularly a low-temperature deep gel profile-modification plugging agent and a preparation method thereof. The profile-modification plugging agent is prepared from the following components in percentage by weight: 0.08-0.2% of high polymer coagulant, 0.18-0.25% of dicyandiamide modified urea formaldehyde resin delayed crosslinker, 0.05-0.20% of industrial soda ash, 0.01-0.02% of meta-aminophenol and the balance of water. The invention performs the certain functions of mechanical plugging, endurable movable plugging, dynamic water diversion, pressure wave oscillation and oil washing and carrying, and satisfies the demands for low-temperature oil reservoir high-dose deep profile-modification water plugging and displacement in the oil field.

Description

[0001] Technical field: [0002] The invention relates to a water shutoff agent for oilfield production, in particular to a low-temperature deep gel profile control water shutoff agent and a preparation method thereof. Background technique: [0003] In order to meet the needs of high-dose deep profile control and water plugging in sandstone reservoirs and fractured oil reservoirs in 20°C-50°C oilfields, the chemical profile control and water plugging implemented to effectively control the rise of water cut has entered the large-dose deep profile control In the stage of water plugging and flood control, low-temperature profile control and water blocking agents currently used on site, such as chromium jelly / composite organic chromium polymer profile control and water blocking agents, are more effective than ordinary inorganic and acrylamide monomer profile control and water blocking agents. Many have superior performance, but the mechanical plugging effect, long-term moving pl...

Claims

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Application Information

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IPC IPC(8): C09K8/42C09K8/588
Inventor 杨辉霍春光杨开徐进
Owner 盘锦市庆联油田工程技术服务有限公司
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