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Oil-based drilling fluid filtrate reducer containing cross-linked structure, and preparation method

A technology of oil-based drilling fluid and cross-linked structure, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as the gap in filtration performance, enhance plugging and wall-building performance, and improve filtration reduction. effect, the effect of wide application prospects

Active Publication Date: 2013-07-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, domestic and foreign reports have used humic acid to modify and synthesize anti-high temperature oil-based drilling fluid fluid loss additives, such as the reaction of humic acid with polyethylene polyamine, or the reaction of humic acid with long-chain alkyl fatty acids and organic amines. , the fluid loss additive products prepared by these methods have a certain fluid loss performance, but compared with asphalt products, there is still a certain gap in fluid loss performance

Method used

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  • Oil-based drilling fluid filtrate reducer containing cross-linked structure, and preparation method
  • Oil-based drilling fluid filtrate reducer containing cross-linked structure, and preparation method
  • Oil-based drilling fluid filtrate reducer containing cross-linked structure, and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh 0.1 kg of lauric acid and 1 kg of triethylenetetramine, add them to the reaction vessel, heat to dissolve and stir evenly, pass nitrogen gas for 30 minutes, and raise the temperature of the system to 80 o C, reacted for 8 h. Lower the system temperature to 75 o C, add 25 kg of humic acid, stir evenly, and after passing nitrogen for 20 minutes, raise the temperature of the system to 90 o C, reacted for 10 h. Add 0.005 kg of suberic acid to the system, stir evenly, and the system is at 100 o C, react for 6 h. Cool the product to room temperature, pulverize it with a pulverizer, and pass through a 50-mesh sieve to obtain the product.

Embodiment 2

[0046] Weigh 30 kilograms of lauric acid and 1 kilogram of triethylenetetramine, add them to the reaction vessel, heat to dissolve and stir evenly, pass nitrogen gas for 20 minutes, and raise the temperature of the system to 160 o C, react for 15 minutes. Lower the system temperature to 85 o At about C, add 0.5 kg of humic acid, stir evenly, pass nitrogen gas for 30 minutes, and raise the temperature of the system to 180 o C, react for 15 minutes. Add 5 kg of suberic acid to the system, stir evenly, and the system is at 200 o C, react for 15min. Cool the product to room temperature, pulverize it with a pulverizer, and pass through a 100-mesh sieve to obtain the product.

Embodiment 3

[0048] Weigh 15 kilograms of palmitic acid and 1 kilogram of tetraethylenepentamine, add them to the reaction vessel, heat to dissolve and stir evenly, pass nitrogen gas for 20 minutes, and raise the temperature of the system to 120 o C, reacted for 3 h. Lower the system temperature to 80 oAt about C, add 5 kg of humic acid, stir evenly, pass nitrogen for 28 minutes, and raise the temperature of the system to 120 o C, reacted for 3 h. Add 0.5 kg of lauric acid to the system, stir evenly, the system is at 130 o C, the reaction 3h. Cool the product to room temperature, pulverize it with a pulverizer, and pass through a 70-mesh sieve to obtain the product.

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Abstract

The invention provides an oil-based drilling fluid filtrate reducer containing a cross-linked structure, and a preparation method. the method is carried out according to the following steps: (1) adding 0.1-30 parts by mass of a long-chain alkyl fatty acid and 1 part by mass of a polyene polyamine into a reaction vessel, stirring uniformly, driving oxygen for 20-30 min with nitrogen, heating to a temperature of 80-160 DEG C and reacting for 15 min-8 h; (2) cooling a temperature of the system to 75-85 DEG C, adding 0.5-25 parts by mass of a humic acid, stirring uniformly, driving the oxygen for 20-30 min with the nitrogen, heating to a temperature of 90-180 DEG C and reacting for 15 min-10 h; (3) adding 0.005-5 parts by mass of a binary or multiple organic acid, stirring uniformly and reacting for 15 min-16 h at a temperature of 100-200 DEG C; and (4) cooling a product obtained by the step (3) to a room temperature, smashing the product, and screening with a 50-100 mesh sieve to obtain the product.

Description

technical field [0001] The invention relates to a preparation method of an oil-based drilling fluid fluid loss reducer, and belongs to the technical field of chemical modification of natural polymers. Background technique [0002] Oil-based drilling fluid has the advantages of strong inhibition, anti-corrosion, anti-pollution, good lubricity, good wellbore stability, good temperature resistance and protection of oil layers, and has been widely used. An important performance of oil-based drilling fluid is fluid loss reduction performance. Good fluid loss control can stabilize the well wall, prevent pressure differential sticking, avoid formation damage, etc., which is crucial to the smooth completion of drilling operations and maintenance of oil well productivity. At present, the fluid loss control agents used in oil-based drilling fluids are mainly asphalt products. Asphalt fluid loss control agents have the disadvantages of affecting the ROP and causing pollution to the env...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08H99/00
Inventor 邱正松郭保雨冯萍宫新军王宝田严波邸丛朝蒋莉高素丽张海青王海军
Owner CHINA PETROLEUM & CHEM CORP
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