Free liquid control agent as well as preparation method and application thereof

A control agent and free technology, applied in the direction of chemical instruments and methods, silicates, drilling compositions, etc., can solve the problems of large amount of liquid silicon, reduce the free liquid of cement slurry, etc., and achieve short thickening time, No procoagulant side effects, eliminating or reducing the effect of free fluid

Active Publication Date: 2022-02-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Qiu Xiehe et al. (Qiu Xiehe, Wang Liangcai, Guo Guangping. Evaluation of Microblock liquid silicon and its application in Chinese oilfields [J]. Drilling Fluid and Completion Fluid. 2010 (04).) introduced that liquid silicon can reduce the Free liquid, which introduces liquid silicon as a free liquid control agent, which has obvious effects, but the amount of liquid silicon added in this technical solution is relatively large, generally adding more than 10%

Method used

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  • Free liquid control agent as well as preparation method and application thereof
  • Free liquid control agent as well as preparation method and application thereof
  • Free liquid control agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Synthetic example 1

[0093] With calcium nitrate tetrahydrate and tetraethoxysilane as raw materials, the raw materials are weighed respectively according to the stoichiometric ratio of calcium-silicon molar ratio of 1:1, put into a reaction kettle, and then the mass ratio of water and calcium nitrate tetrahydrate is 10:1 Add distilled water, add calcium nitrate tetrahydrate, tetraethoxysilane and 3 / 10,000 of the catalyst hexamethamine, stir and react in the reaction kettle at 50°C for 5 hours to obtain calcium silicate hydrate liquid Product A.

[0094] The synthetic calcium silicate hydrate liquid product A was processed, specifically, pouring 1 part of the synthesized liquid product sample into 5 parts of absolute ethanol, ultrasonicating for 3 minutes, and filtering; after repeating three times. Pour 1 part of the sample into 5 parts of absolute ethanol again, ultrasonicate for 3 minutes, suck it out with a dropper and drop it on the aluminum foil, and dry it at 90°C for later use to prepare a...

Synthetic example 2

[0096] The preparation method is the same as that of Synthesis Example 1, except that the catalyst is amantadine hydrochloride to obtain calcium silicate hydrate liquid product B.

Synthetic example 3

[0098] The preparation method is the same as that of Synthesis Example 1, except that the catalyst is a mixture of amantadine hydrochloride and urotropine, wherein the mass ratio of amantadine hydrochloride and urotropine is 1:1 to obtain hydrated silicic acid Calcium liquid product C.

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Abstract

The invention relates to a free liquid control agent and a preparation method and application thereof. The free liquid control agent provided by the invention comprises hydrated calcium silicate, an optional stabilizer and an optional preservative. The free liquid control agent provided by the invention can effectively eliminate or reduce the free liquid of well cementation cement slurry, is suitable for preparation of zero-free-liquid cement slurry, has little influence on the thickening time of the cement slurry, and has no coagulation accelerating side effect.

Description

technical field [0001] The invention relates to a free fluid control agent and its preparation method and application. Background technique [0002] When cementing the diameter section in the field of oil and gas well cementing, in the annular cement column, larger particles will settle under the action of gravity, and may have a tendency to aggregate and bridge plugs, while the position below the bridge plugs is free of liquid. Accumulation can sometimes form gutters or hoses, causing cement stones to crack when pressurized. In addition, free fluid accumulation to form water pockets also prevents cement from bonding the casing and formation. It may also gel prematurely, resulting in low or no static pressure on the formation, and gas channeling occurs. In the cementing of horizontal wells, the free liquid formed in the horizontal section will gradually move up. When it reaches a certain amount, the free liquid sacs on the upper part of the annular cement will communicate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/08C04B24/38C04B28/00C01B33/24C09K8/467
CPCC04B40/0039C04B22/08C04B28/00C01B33/24C09K8/467C04B24/38C04B24/008C04B2103/50Y02W30/91
Inventor 刘学鹏曾义金刘飞
Owner CHINA PETROLEUM & CHEM CORP
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