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Amino polyether drilling fluid and preparation method thereof

A technology of amino polyether and drilling fluid, which is applied in the field of drilling fluid, and can solve the problem that drilling fluid cannot take into account environmental protection and well wall stability.

Pending Publication Date: 2020-10-27
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the drilling fluid with potassium chloride as the main inhibitor cannot meet the requirements of environmental protection and wellbore stability well, and the drilling fluid is faced with the difficult problem of maintaining good rheology while improving inhibition and environmental protection

Method used

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  • Amino polyether drilling fluid and preparation method thereof
  • Amino polyether drilling fluid and preparation method thereof
  • Amino polyether drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Under the high-speed stirring condition of 4000r / min, 12g of sodium-based bentonite and 0.8g of sodium carbonate were added to 400g of clear water, stirred at a high speed of 8000r / min for 20min, sealed at room temperature for 24h, and the base slurry was obtained;

[0058] Under the high-speed stirring condition of 4000r / min, add 0.4g xanthan gum, 2g carboxymethylcellulose sodium salt, 2g polyanionic cellulose, 0.4g high temperature resistant starch, 8g ultrafine calcium carbonate, 8g polyalcohol, stir 20min at high speed under the rotating speed of 8000r / min; Then add 4g potassium sulfate, 12g amino polyether (commercially available product, manufacturer is Suzhou Changke New Material Technology Co., Ltd., model is D-230, structure (as shown in Formula 1), high-speed stirring (8000r / min) until fully dissolved, then add 105g of barite, put it into an aging tank, and age at 120°C for 16 hours to obtain amino polyether drilling fluid.

[0059] After testing, the density ...

Embodiment 2

[0063] Under the high-speed stirring condition of 4000r / min, 12g of sodium-based bentonite and 0.8g of sodium carbonate were added to 400g of clear water, stirred at a high speed of 8000r / min for 20min, sealed at room temperature for 24h, and the base slurry was obtained;

[0064] Under the high-speed stirring condition of 4000r / min, add 0.4g xanthan gum, 2g carboxymethylcellulose sodium salt, 2g polyanionic cellulose, 0.4g high temperature resistant starch, 8g ultrafine calcium carbonate, 8g of polyalcohol was stirred at a high speed of 8000r / min for 20min; then add 4g of potassium sulfate, 12g of amino polyether (commercially available product, the manufacturer is Wuxi Akeli Technology Co., Ltd., the model is MA-240, the structure (as shown in formula 2), high-speed stirring (8000r / min) to fully dissolve, then add 105g of barite, put it into an aging tank, and age at 120°C for 16 hours to obtain amino polyether drilling fluid.

[0065] After testing, the density of the amino...

Embodiment 3

[0069] Under the high-speed stirring condition of 4000r / min, 12g of sodium-based bentonite and 0.8g of sodium carbonate were added to 400g of clear water, stirred at a high speed of 8000r / min for 20min, sealed at room temperature for 24h, and the base slurry was obtained;

[0070] Under the high-speed stirring condition of 4000r / min, 0.4g xanthan gum, 2g carboxymethyl cellulose sodium salt, 2g polyanionic cellulose, 0.4g high temperature resistant starch, 8g nanmu powder, 8g polymer Alcohol, high-speed stirring 20min under the rotating speed of 8000r / min; Then add 4g potassium sulfate, 12g amino polyether (commercially available product, manufacturer is Suzhou Changke New Material Technology Co., Ltd., model is T-403, and structure is as formula 3), high-speed stirring (8000r / min) until fully dissolved, then add 105g of barite, put it into an aging tank and age at 120°C for 16 hours to obtain amino polyether drilling fluid.

[0071] After testing, the density of the amino poly...

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Abstract

The present invention provides an amino polyether drilling fluid, which is prepared from the following components by weight: 100 parts of water; 1 to 3 parts of sodium bentonite; 0.1 to 0.2 part of sodium carbonate; 0.1 to 0.2 part of a tackifier; 0.5 to 1.0 part of sodium carboxymethyl cellulose salt; 0.3 to 1.0 part of polyanionic cellulose; 0.1 to 1.0 part of high temperature resistant starch;1-3 parts of a blocking agent; 1-3 parts of polymeric alcohol; 1-5 parts of potassium sulfate and 1-3 parts of amino polyether. The amino polyether drilling fluid provided by the invention has good rheological property and inhibition, is suitable for drilling oil and gas reservoirs with high water sensitivity and high clay content, has good environmental protection performance, and eliminates pollution of chloride ions to surface water and soil and adverse effects on plant growth. The invention also provides a preparation method of the amino polyether drilling fluid.

Description

technical field [0001] The invention relates to the technical field of drilling fluids, and more specifically relates to an amino polyether drilling fluid and a preparation method thereof. Background technique [0002] With the deepening of exploration and development, drilling is developing towards deep wells and ultra-deep wells, and the formations encountered are becoming more and more complex. Due to factors such as geological factors, wellbore structure and selected drilling fluids, the wellbore often has instability problems. That is, the instability of the wellbore. Borehole wall instability is a technical problem often encountered in oil and gas drilling engineering, and it is also an eternal problem accompanying drilling engineering. Therefore, it is one of the important tasks of petroleum workers to effectively solve the problem of wellbore instability during drilling. [0003] Wellbore instability during drilling is related to geology, drilling engineering, and ...

Claims

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Application Information

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IPC IPC(8): C09K8/20C09K8/24
CPCC09K8/206C09K8/24C09K2208/12
Inventor 马文英钟灵刘晓燕孙举史沛谦毛世发
Owner SINOPEC SSC
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