Method for treating oilfield sewage by pre-oxidation anticorrosion scale inhibition integration technique
A technology of oilfield sewage and pre-oxidation, which is applied in the field of oilfield sewage treatment, can solve the problems that the heavy metal content is too high to meet the water quality discharge standard requirements, and achieve the effects of solving the problem of bacterial resistance, reducing the amount of sludge output, and reducing the overall cost
Inactive Publication Date: 2017-02-22
陕西海山能源发展有限公司
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the problem that the COD and heavy metal content of the oily wastewater in the oilfield after the treatment of the existing treatment agent in the existing oilfield sewage treatment in the background technology is still too high to meet the requirements of the water quality discharge standard, and to provide a treatment for the oily wastewater in the oilfield agent
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[0024] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described in conjunction with specific embodiments and accompanying drawings.
[0025] A method for oilfield sewage treatment using pre-oxidation anti-corrosion and anti-scaling integrated technology, which is completed according to the following steps:
[0026] (1) Three-phase separation of sludge, water and oil in sewage;
[0027] (2) Add preoxidant, water quality regulator and coagulant to the sewage after three-phase separation to degrease the pollution;
[0028] (3) Add stabilizer to the sewage after degreasing;
[0029] The preoxidant is 54mg / L, the water quality conditioner is 115mg / L, the coagulation aid is 40mg / L, and the stabilizer is 50mg / L.
[0030] The preoxidant is hydrogen peroxide; the coagulation aid is aluminum sulfate and anion polyacrylamide; the water quality regulator is a pH regulator; and ...
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Abstract
The invention discloses a method for treating oilfield sewage by a pre-oxidation anticorrosion scale inhibition integration technique, and relates to a new method for treating oilfield sewage. The method mainly includes the steps: performing sludge, water and oil in the sewage; respectively adding pre-oxidation agents, water quality regulators and coagulant aids, performing oil removal for pollution; adding stabilizing agents into sewage after removing oil. By the aid of the pre-oxidation anticorrosion scale inhibition integration sewage treatment technique, water quality of the treated sewage can comprehensively and stably reach standards, water properties basically cannot change, corrosion rate is controlled in a 0.076mm / a industrial standard, excellent compatibility between the treated sewage and the formation water is kept, additional sludge cannot be generated in the sewage treatment process, sludge output is reduced, the bacteria drug-resistance problem is fundamentally solved, and the comprehensive cost of sewage treatment is reduced.
Description
technical field [0001] The invention relates to a new method for treating oilfield sewage, in particular to a method for treating oilfield sewage by utilizing the integrated technology of pre-oxidation, anticorrosion and scale inhibition. Background technique [0002] The composition of oily wastewater from oilfields is very complex. The main sources of its wastewater are drilling wastewater, well washing wastewater, acidified fracturing fluid wastewater and production fluid, etc. Some oil extraction wastewater has a variety of components. The water contains a large amount of crude oil, soluble salts and heavy metals, and suspended emulsified oil. , solid particles, hydrogen sulfide and other natural impurities. In addition, it contains some additives used to change the properties of produced water and acids, corrosion inhibitors, viscostabilizers, bactericides, and scale inhibitors injected into the formation. The content of COD, suspended solids, chroma, heavy metals, etc...
Claims
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IPC IPC(8): C02F9/04C02F103/10
CPCC02F1/001C02F1/281C02F1/50C02F1/5236C02F1/56C02F1/66C02F1/722C02F9/00C02F2103/10
Inventor 王兴郭荣李国锋南航高鑫高翔
Owner 陕西海山能源发展有限公司