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Water treatment agent used for oilfield reinjection water and preparation method thereof

A technology for reinjecting water and water treatment agents in oilfields, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., and can solve unstable water quality and easy blockage of pipelines , complex ionic components, etc.

Inactive Publication Date: 2018-12-21
石家庄长宏能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oilfield reinjection water has the characteristics of high water temperature, generally high salinity, complex ionic components, diverse organic matter, oil content and varying degree of emulsification of oil products, and unstable water quality. Bacteria are easy to breed in water injection, and these bacteria are easy to gather impurities in the water to form large pieces of dirt, which can easily block the transmission pipeline and the bottom gap, causing serious harm to the oilfield mining work

Method used

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  • Water treatment agent used for oilfield reinjection water and preparation method thereof
  • Water treatment agent used for oilfield reinjection water and preparation method thereof
  • Water treatment agent used for oilfield reinjection water and preparation method thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing the above-mentioned water treatment agent for oilfield reinjection water, comprising the following steps:

[0035] C9 petroleum resin, polyacrylamide, N,N'-sodium dilauroyl ethylenediamine diacetate, zeolite, bentonite, fumed silica, microbial agent, inorganic salt, corrosion inhibitor, scale inhibitor, at 40 Stir at ~50°C for 4-6 hours to obtain the water treatment agent for oilfield reinjection water.

[0036] Among them, C9 petroleum resin, polyacrylamide, N,N'-sodium dilauroyl ethylenediamine diacetate, zeolite, bentonite, fumed silica, microbial agent, inorganic salt, corrosion inhibitor, and scale inhibitor are the same as above mentioned, and will not be repeated here.

[0037] In the above technical solution, the preparation method is simple, and the prepared water treatment agent for oilfield reinjection water has good scale inhibition ability and bactericidal ability at the same time, improves water p...

Embodiment 1

[0040] The water treatment agent for oilfield reinjection water comprises the following raw materials in parts by weight:

[0041] 16 parts of C9 oil resin, 24 parts of polyacrylamide, 6.5 parts of N,N'-dilauroyl ethylenediamine diacetate sodium, 27 parts of zeolite, 8.5 parts of bentonite, 8 parts of fumed silica, 1.4 parts of microbial agent, 3 parts of sodium chloride, 1.6 parts of corrosion inhibitor, 1.7 parts of scale inhibitor;

[0042] Microbial agents include Thiobacillus denitrificans, Chlamydia planktonicus, Phanerochaete chrysosporium with a mass ratio of 1.8:0.45:0.65;

[0043] The corrosion inhibitor includes sodium silicate, sodium citrate, calcium chloride, chitosan and houttuyniatin with a mass ratio of 0.65:1:2:0.9:0.55;

[0044] The scale inhibitor includes horse-propylene copolymer, dodecylamine polyoxyethylene ether, sodium polyacrylate, hydroxypropyl acrylate and ethylene glycol with a mass ratio of 0.6:1.3:1.4:0.6:1.1.

[0045] The preparation method o...

Embodiment 2

[0048] The water treatment agent for oilfield reinjection water comprises the following raw materials in parts by weight:

[0049] 20 parts of C9 oil resin, 20 parts of polyacrylamide, 5.5 parts of N,N'-dilauroyl ethylenediamine diacetate sodium, 30 parts of zeolite, 6.5 parts of bentonite, 10 parts of fumed silica, 1.6 parts of microbial agent, 3.5 parts of aluminum sulfate, 2 parts of corrosion inhibitor, 1 part of scale inhibitor;

[0050] Microbial agents include Thiobacillus denitrificans, Chlamydia planktonicus, Phanerochaete chrysosporium with a mass ratio of 1:0.5:0.8;

[0051]Corrosion inhibitors include sodium silicate, sodium citrate, calcium chloride, chitosan and houttuyn with a mass ratio of 0.7:2:1:1.1:0.45;

[0052] The antiscalant includes horse-propylene copolymer, dodecylamine polyoxyethylene ether, sodium polyacrylate, hydroxypropyl acrylate and ethylene glycol at a mass ratio of 0.7:1.7:1.2:0.4:1.3.

[0053] The preparation method of water treatment agen...

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Abstract

The invention discloses a water treatment agent used for oilfield reinjection water and a preparation method thereof. C9 petroleum resin, polyacrylamide, N,N'-dilauroyl-ethylenediamine-diacetic acid,zeolite, bentonite, fumed silica, a microbial agent, inorganic salt, a corrosion inhibitor and a scale inhibitor are used as raw materials for preparing the water treatment agent used for the oilfieldreinjection water, the components are scientifically compatible, and thus the components can come into play fully and efficiently, so that the water treatment agent has good scale inhibiting capability and sterilization capability at the same time, the water quality purifying capability is improved, the water treatment agent is beneficial for oilfield development work, and meanwhile, environmental pollution is avoided.

Description

technical field [0001] The invention relates to the field of oilfield exploitation, in particular to a water treatment agent for oilfield reinjection water and a preparation method thereof. Background technique [0002] After the crude oil is extracted, there will be a deficit in the underground. In order to maintain or increase the pressure of the oil layer and obtain a higher recovery rate, the water injection in the oil field has been more and more widely used in the oil field production. In multiple oil recovery in oil fields, the liquid produced from the oil well is separated from the oil and water phases by the separator, the oil phase is transported to the oil transfer station, and the water phase is transported to the sewage treatment station. In the sewage treatment station, the water phase undergoes treatment processes such as de-emulsifying oil, settling silt, and filtering suspended solids, and then re-injects into the oil layer, which is called oilfield re-injec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F3/34C02F1/50C02F103/10
CPCC02F1/50C02F3/34C02F5/12C02F2103/10C02F2303/08C02F2303/04C02F2303/22
Inventor 李会勇赵建龙郜杨贾叶飞郑金中李小冬
Owner 石家庄长宏能源科技有限公司
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