Automatically-crushed remigration particle gel profile-control and water-shutoff agent

A technology of profile control water blocking agent and granular gel, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high deformability, delayed crosslinking and low crosslinking, and achieve the effect of high gel strength

Inactive Publication Date: 2006-09-06
盘锦市庆联油田工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous deepening of oilfield water injection development, many oilfields are already in the development stage of medium and high water cut periods. The chemical profile control and water shutoff implemented in the prior art to effectively control the rise of water cut has entered into the large-dose deep profile control and water shutoff. At the stage of profile control and flooding, at present, the profile control and water shutoff agents used on site mainly use chromium gel/composite ion polymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1:

[0013] The profile control and water shutoff agent of the present invention adopts milky white granular temperature-resistant and salt-resistant polyacrylamide with a molecular weight of 23-25 ​​million, and the content of the added water is 0.05-0.4%; the molecular weight is 5-8 million flocculants, and the content of the added water is 0.02-0.2%; modified polyester resin light brown liquid cross-linking agent, added to water content of 0.2-0.8%; cellulose ether dispersant, added to water content of 0.01-0.1%. After mixing the gel solution of the above components, it can be synthesized at a pH of 7.2 to 8.0 by processing at a temperature of 60-90°C. Compared with the chromium jelly / composite ion polymer / resin gel deep water plugging agent, the profile control water shutoff agent has re-migration, swelling rate of 1-2 times, viscoelasticity, delayed crosslinking and Adjustable strength, the gel will form a gel within 5-7 days, and the gel strength is strong. It...

Example Embodiment

[0014] Example 2:

[0015] The preparation principle of the present invention is that during manufacture, first prepare polyacrylamide into a solution with a concentration of 0.05-0.4%, and after dissolving uniformly, add granular flocculant in an amount of 0.02-0.2%, and then add the modified polyester resin Cross-linking agent, the addition amount is 0.2-0.8%, and finally the cellulose ether dispersant is added in the amount of 0.01-0.1%. The temperature of the above-mentioned solution is reacted at 60-90℃, and the polyacrylamide is mainly cross-linked in the early stage of preparation. Only a small amount of flocculant participates in the reaction. After 5-7 days, it will become a yellow bulk gel and exist in solid form. In addition, because the flocculant reacts slowly with the dispersant, under the action of the dispersant, The flocculant generates unstable chemical bonds, and the chemical bonds are easily affected by temperature. They are easy to break when the temperature i...

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PUM

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Abstract

The invention relates to an autoslack remigration pearlgel water plugging control agent which belongs to oil-field injection well water plugging control agent. The chemical water plugging control agent applied to effectively control the contained water when the oil field enters the middle-late phase, has come into the phase of large-dose deep water plugging control. The performance of gel deep water-plugging control agent of chromium gel/complex-ion polymer/resin used in present technology is more excellent than common polyacrylamides gel and acrylamide monomer gel, but the lower remigration, high-deformability and delayed crosslinking can not satify the requirements, so the invention obtains the glue by adopting salt resistance polymer, temperature-resistance polypropeneamino solution with concentration of 0.05-0.4 %, 0.02-0.2 % flocculant, 0.2-0.8 % modified mylar crosslinker, and 0.01-0.1 % cellulose ether disperser, with 60-90 DEG reaction temperature of the prepared solution and 7.2-8.0 of pH value. The gel can be remigrated, have properties of dilatability, high viscoelasticity and delayed crosslinking, and the intensity can be adjusted. The said glue can form gel when injected into the well for 5-7 days, then the gel breaks up after 30 days and remigrates to the deep ground layer to plug the ground layer.

Description

Technical field: [0001] The invention relates to a profile control and water shutoff agent for automatic cracking and remigration granular gel, which belongs to the profile control and water shutoff agent for water injection wells in oil fields. Background technique: [0002] With the continuous deepening of oilfield water injection development, many oilfields are already in the development stage of medium and high water cut periods. The chemical profile control and water shutoff implemented in the prior art to effectively control the rise of water cut has entered into the large-dose deep profile control and water shutoff. At the stage of profile control and flooding, at present, the profile control and water shutoff agents used on site mainly use chromium gel / composite ion polymer / resin gel deep profile control water shutoff agent. Acrylamide monomer-based profile control and water shutoff agents have much superior performance, but due to the re-migration of the plugging ag...

Claims

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Application Information

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