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Washing agent for wash oil for well cementation and preparation method thereof

A flushing agent and oil-washing technology, applied in the field of oil-washing flushing agent and its preparation, can solve problems such as contact pollution between cement slurry and oil-based drilling fluid, and achieve the effects of good flushing effect, easy availability of materials, and strong degreasing ability.

Active Publication Date: 2014-03-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned problems existing in the existing flushing fluid, and to provide a water-based oil-washing flushing agent for well cementing and a preparation method thereof. The flushing agent in the present invention has the functions of flushing and dilution, and can remove cement slurry and oil-based flushing agent. Drilling fluid contact with pollution can play the role of isolating and cleaning formation and casing interface, so as to achieve the purpose of improving cementing quality

Method used

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  • Washing agent for wash oil for well cementation and preparation method thereof

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Effect test

Embodiment 1

[0025] Add 1200 kg of water into the reaction kettle, raise the temperature to 45°C, weigh 375 kg of fatty alcohol polyoxyethylene ether sodium sulfate (n=3), 105 kg of fatty alcohol polyoxyethylene ether (n=9), octylphenol Add 180 kg of polyoxyethylene ether (n=10) and 75 kg of sorbitan monooleate into the reaction kettle respectively, add a small amount of silicone defoamer while stirring, after stirring for 30 minutes, cool to room temperature and discharge , to obtain a translucent liquid, that is, sample 1 of the oil washing and rinsing agent of the present invention.

Embodiment 2

[0027] Add 1100 kg of water into the reaction kettle, raise the temperature to 45°C, weigh 100 kg of liquid soap, 300 kg of fatty alcohol polyoxyethylene ether sodium sulfate (n=3), 95 kg of fatty alcohol polyoxyethylene ether (n=9) kg, 175 kg of octylphenol polyoxyethylene ether (n=10), and 70 kg of sorbitan monooleate were added to the reaction kettle respectively, and a small amount of silicone defoamer was added while stirring, and after stirring for 30 minutes, Cool to room temperature and discharge to obtain a translucent liquid, which is sample 2 of the oil washing and rinsing agent of the present invention.

Embodiment 3

[0029] Add 1100 kg of water into the reaction kettle, raise the temperature to 45°C, weigh 150 kg of liquid soap, 280 kg of fatty alcohol polyoxyethylene ether sodium sulfate (n=3), 90 kg of fatty alcohol polyoxyethylene ether (n=9) kg, 170 kg of octylphenol polyoxyethylene ether (n=10), and 70 kg of sorbitan monooleate were added to the reaction kettle, stirred evenly, and after stirring for 30 minutes, cooled to room temperature and discharged to obtain half Transparent liquid, which is the sample 3 of the oil washing and rinsing agent of the present invention.

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Abstract

The invention discloses a washing agent for wash oil for well cementation and a preparation method thereof. The washing agent comprises the following materials in percentage by weight: 0%-10% of soap bases, 10%-20% of fatty alcohol-polyoxyethylene ether sodium sulfate, 4.0%-6.0% of fatty alcohol polyethenoxy ether, 7.0%-10% of alkylphenol polyoxyethylene ether, 2.0%-4.0% of sorbitan monooleate and the balance of water. The washing agent disclosed by the invention has washing and diluting functions, can solve the problem of pollution caused by the contact of cement paste and an oil-based drilling fluid, and plays a role of isolating and cleaning the stratum and the sleeve pipe interface, thereby achieving the purpose of enhancing well cementation quality.

Description

technical field [0001] The invention relates to a flushing agent for oil and gas well cementing and a preparation method thereof, in particular to an oil washing flushing agent for well cementing under the condition of oil-based drilling fluid and a preparation method thereof. Background technique [0002] At present, in the process of oil and gas well exploration, more and more oil-based, imitation oil-based, and water-in-oil emulsion drilling fluids are used for drilling operations. The oil phases of the oil-based drilling fluids mainly used are: diesel oil, white oil, Synthetic organic matter, etc., have played a good role in speeding up, collapsing, and protecting oil and gas layers. However, the oil-based drilling fluid poses challenges to the cementation of the two interfaces of the cement sheath and the compatibility of the drilling fluid and the cement slurry. After a layer of oil film is attached to the well wall and casing surface, the cement cementation is basica...

Claims

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Application Information

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IPC IPC(8): C09K8/52
CPCC09K8/40C09K8/52
Inventor 严海兵张成金赵启阳李美平冷永红袁龙
Owner BC P INC CHINA NAT PETROLEUM CORP
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