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Method for improving temperature resistance of environment-friendly drilling fluid additive

A drilling fluid treatment agent, an environmentally friendly technology, applied in the field of drilling chemical additives, can solve problems such as molecular structure optimization, and achieve the effects of easy on-site operation, improved temperature resistance, and improved temperature resistance

Inactive Publication Date: 2019-08-02
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above studies have played an important role in promoting the improvement of the temperature resistance of environmental-friendly drilling fluid treatment agents, but they have not been able to optimize the molecular structure of environmental-friendly drilling fluid treatment agents, or have yet to be further clarified in terms of molecular weight and cross-linking agent types.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At room temperature, prepare 500ml of 10% acrylamide solution, add 5ml of 10% ammonium persulfate solution dropwise in a constant temperature water bath at 65°C, stir slowly, stop heating after half an hour; add 500ml of water, add 10% hydroxide Put 20ml of sodium into a boiling water bath, raise the temperature to above 90°C for hydrolysis, stir slowly, take it out after half an hour, and obtain a strong hydration polymer; prepare 20g of carboxymethyl starch into a 20% aqueous solution, add 5ml of strong water Chemical polymer, 2g sodium tripolyphosphate, 4g potassium formate, slowly stirred in a constant temperature water bath at 60°C for half an hour, then stop heating, and an environmentally friendly drilling fluid treatment agent with better temperature resistance was obtained.

Embodiment 2

[0023] At room temperature, prepare 500ml of 9% acrylamide solution, add 5ml of 9% ammonium persulfate solution dropwise in a constant temperature water bath at 75°C, stir slowly, stop heating after 25 minutes; continue to add 500ml of water, and add 10% hydrogen Put 20ml of sodium oxide into a boiling water bath, heat up to 95°C for hydrolysis, stir slowly, take it out after half an hour, and make a strong hydration polymer; prepare 20g of carboxymethyl cellulose into a 20% aqueous solution, add 5ml of strong Hydrate polymer, 2g sodium tripolyphosphate, 4g potassium formate, stir slowly in a constant temperature water bath at 60°C for half an hour, stop heating, and get an environmentally friendly drilling fluid treatment agent with better temperature resistance

Embodiment 3

[0025] At room temperature, prepare 550ml of 10% acrylamide solution, add 5.2ml of 10% ammonium persulfate solution dropwise in a constant temperature water bath at 70°C, stir slowly, stop heating after 40 minutes; add 550ml of water, add 10% hydrogen Put 23ml of sodium oxide into a boiling water bath, heat up to 96°C for hydrolysis, stir slowly, take it out after half an hour, and make a strong hydration polymer; prepare 25g of carboxymethyl starch into a 20% aqueous solution, add 6ml of strong water Chemical polymer, 2.5g sodium tripolyphosphate, 4.5g sodium formate, slowly stirred in a constant temperature water bath at 60°C for half an hour, then stop heating, and an environmentally friendly drilling fluid treatment agent with better temperature resistance was obtained.

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Abstract

The invention provides a method for improving temperature resistance of an environment-friendly drilling fluid additive. An acrylamide solution with mass concentration is prepared at the room temperature, an ammonium persulfate solution is added in thermostatic waterbath at 60-90 DEG C, and heating is stopped after the solution is stirred; water and sodium hydroxide are added continuously, hydrolysis is performed when the temperature is increased to 90 DEG C or higher, a product is taken out after stirring, and a strongly hydrated polymer is prepared; after an aqueous solution is prepared fromthe environment-friendly drilling fluid additive, the strongly hydrated polymer, a cross-linking agent and formate are added, the solution is slowly stirred in thermostatic waterbath at 50-80 DEG C for 20-40 min, then heating is stopped, and the environment-friendly drilling fluid additive is prepared. According to the method, the environment-friendly drilling fluid additive is optimized by adjusting the molecular structure, molecular weight, hydration groups and the cross-linking agent, the temperature resistance of the environment-friendly drilling fluid additive is improved, green drillingis facilitated, and the method is applicable to the fields of petroleum drilling and the like.

Description

technical field [0001] The invention relates to a method for improving the temperature resistance of an environment-friendly drilling fluid treatment agent in the technical field of drilling chemical additives. Background technique [0002] With the increasing awareness of environmental protection in oil extraction, the pollution of waste drilling fluid to the environment has been paid more and more attention. China has gradually begun to require harmless treatment of waste drilling fluid and waste cuttings to reduce environmental pollution and damage to the ecological environment. This "end-of-pipe treatment" treatment method is costly and difficult to completely eliminate hidden dangers of pollution, which has brought huge economic and environmental pressure to the drilling industry. As oilfield exploration and development continue to advance to deep formations, it is necessary to introduce a treatment agent with better temperature resistance into the drilling fluid. Most...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08F120/56C08J3/24C08L33/26C08L1/28C08L3/08
CPCC08F120/56C08J3/246C08J2301/28C08J2303/08C08J2433/26C09K8/035
Inventor 李公让韩来聚李作会周延军刘振东
Owner SINOPEC SSC
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