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A drilling fluid and a method of improving fluid loss reduction performance of the drilling fluid

A drilling fluid and base fluid technology, applied in the field of drilling fluid, can solve the problems of high pour point and easy hydrolysis of ester groups, and achieve the effects of low pour point, good lubricating performance and good degradability

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high pour point of fatty acid methyl ester, its application range is limited to a certain extent, and its ester group is easily hydrolyzed

Method used

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  • A drilling fluid and a method of improving fluid loss reduction performance of the drilling fluid
  • A drilling fluid and a method of improving fluid loss reduction performance of the drilling fluid
  • A drilling fluid and a method of improving fluid loss reduction performance of the drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 160g of isooctyl alcohol into 300g of base liquid A (cottonseed oil biodiesel), add 9.0g of catalyst p-toluenesulfonic acid under normal pressure under stirring, after the addition is completed, feed N under normal pressure 2 , heated to 150°C, stirred and reacted for 4 hours, and washed with water to obtain base liquid B.

Embodiment 2

[0047] Add 106g of isoamyl alcohol into 300g of base liquid C (soybean oil biodiesel), add 6.0g of catalyst tetrabutyl titanate under normal pressure under stirring, after the addition is complete, feed N under normal pressure 2 , heated to 120°C, stirred and reacted for 5 hours, and washed with water to obtain the base liquid D.

[0048] The physical and chemical properties of base fluids A, B, C, and D are shown in Table 1.

[0049] Table 1 Physicochemical properties of base fluids A, B, C, and D

[0050]

[0051] Examples 3-8 and comparative examples 1-6 of drilling fluid

[0052] Mix the base liquid with polyisobutylene succinimide, emulsifier, and organic soil according to the formulations in Tables 2 and 3, and stir at a speed of 11000r / min for 10min, then add alkalinity regulator and inorganic salt water, and stir at 11000r / min Examples 3-8 and Comparative Examples 1-6 of the drilling fluid were prepared after stirring at a speed of 30 min.

[0053] The embodiment...

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Abstract

A drilling fluid and a method of improving fluid loss reduction performance of the drilling fluid are provided. The drilling fluid comprises polyisobutylene succinimide, an emulsifier, organic soil, an alkalinity conditioning agent, inorganic saline water and a main amount of a base liquid. The drilling fluid and the method are characterized by excellent fluid loss reduction performance, rheological adjustment performance, good lubrication performance, high hydrolytic stability, good water-loss wall-building performance, no aromatic hydrocarbons, low biotoxicity, good degradability, low pour point, high flash point, wide application ranges and good safety performance.

Description

technical field [0001] The invention relates to a drilling fluid, in particular to a drilling fluid with excellent fluid loss reducing performance. Background technique [0002] Drilling fluids are generally divided into water-based drilling fluids and oil-based drilling fluids. [0003] Water-based drilling fluid has the advantages of environmental protection and economy, but it cannot meet the performance requirements of complex well conditions. For difficult wells, it often encounters excessive torque, resistance when tripping, pipe sticking, low ROP, and borehole failure. Instability, lost circulation and formation damage, etc., and the problems faced by deepwater drilling are more complicated. [0004] As a drilling fluid system with excellent performance, oil-based drilling fluid has the characteristics of good lubricity, strong inhibition and high thermal stability, and is suitable for drilling highly deviated wells, horizontal wells or high-temperature and easily hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24C09K8/34C09K8/36
Inventor 孟川段庆华兰晓艳曾颖峰
Owner CHINA PETROLEUM & CHEM CORP
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