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Integral compatibility appraise evaluation method for heavy crude sewage disposal

A technology for treating chemicals and heavy oily sewage, applied in flocculation/sedimentation water/sewage treatment, separation methods, liquid separation, etc., can solve problems such as contradictions, and achieve the effect of reducing operating costs

Inactive Publication Date: 2008-11-05
LIAOHE GASOLINEEUM EXPLORATION BUREAU
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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 provide a method for evaluating the overall compatibility of heavy oil sewage treatment chemicals in consideration of the entire process of heavy oil sewage advanced treatment and crude oil dehydration treatment to evaluate the overall compatibility of chemicals in the whole process and to solve the possible contradictions in the results of the use of a single chemical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: The overall compatibility of heavy oil sewage treatment agents in a heavy oil combined station is evaluated according to the above method and steps. The chemical agents used on site in the combined station are pre-dehydrating agent, demulsifier and coagulant. In step (1), the dosing concentration of pre-dehydrating agent is 100% of the on-site concentration, the dosing concentration of demulsifier is 100% of the on-site concentration, and the settling time is 4h; in step (2), pre-dehydrating agent, coagulation The dosing concentration of the agent is 20% of the on-site use concentration, the dosing concentration of the demulsifier is 100% of the on-site use concentration, and the settling time is 6h; the dosing concentration of the coagulant is 100% of the on-site use concentration in the step (3). %, the settling time is 0.3h.

Embodiment 2

[0016] Example 2: Three types of chemical agents, pre-dehydrating agent, demulsifier, and coagulant, were used for the heavy oil sewage treatment agent of a heavy oil combined station to evaluate according to the above-mentioned method and steps. Wherein, the dosing concentration of the pre-dehydrating agent in step (1) is 100% of the on-site use concentration, the dosing concentration of the demulsifier is 120% of the on-site use concentration, and the settling time is 6h; in the step (2), the pre-dehydrating agent, The dosing concentration of the coagulant is 20% of the on-site use concentration, the dosing concentration of the demulsifier is 120% of the on-site use concentration, and the settling time is 8h; the dosing concentration of the coagulant in the step (3) is the on-site use concentration 100%, the settling time is 0.5h.

Embodiment 3

[0017] Example 3: Four types of chemical agents, namely pre-dehydrating agent, demulsifier, coagulant, and silicon remover, were used to evaluate the heavy oil sewage treatment agent of a heavy oil combined station according to the above-mentioned method and steps. Wherein, the dosing concentration of the pre-dehydrating agent in step (1) is 100% of the on-site use concentration, the dosing concentration of the demulsifier is 120% of the on-site use concentration, and the settling time is 8h; in the step (2), the pre-dehydrating agent, The dosing concentration of the coagulant is 30% of the on-site use concentration, the dosing concentration of the demulsifier is 120% of the on-site use concentration, and the settling time is 12h; the dosing concentration of the coagulant in the step (3) is the on-site use concentration 100% of the concentration, the settling time is 0.5h; then, take the sewage treated in step (3), add a 100% on-site concentration of desiliconization agent, sti...

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Abstract

The invention relates to an evaluation method for the overall compatibility of a high-viscosity oil wastewater treatment medicament; the method can be carried out according to the types of the chemical agents used by the technical process and the medicating order on the spot, the test conditions shall be the same for various chemical agents being evaluated during the overall technical evaluation on the compatibility of the indoor medicaments for the same oil gas distribution and treatment station or the same oiling region, the method comprises the specific steps of: adding a pre-dehydrator, a demulsifying agent, a coagulant or an additional silicon-removing agent. The method considers the characteristics of the medicaments used in the high-viscosity oil wastewater treatment flow, also considers the using effect of individual medicament, the overall compatibility of the medicaments used in the overall wastewater treatment flow and the influence on the crude oil dehydrating system caused by the recovered dirty oil. The method solves the problem that the evaluation result on the using effect of individual agent differs greatly with the actual application effect, and the overall comprehensive medicament evaluation conducted by utilizing the invention can obviously reduce the dosing agent of the system and the wastewater treatment cost.

Description

Technical field: [0001] The invention relates to a method for advanced treatment of oil field water injection, especially heavy oil sewage, belonging to oil field water injection and petrochemical technology. Background technique: [0002] In the process of water injection, steam huff and puff, and steam flooding in heavy oil oil fields, it is necessary to add chemical agents to the sewage produced by heavy oil production wells for treatment. The steam generated by the boiler is injected into the oil layer to drive oil, and finally achieves the purpose of enhancing heavy oil recovery. [0003] In the advanced treatment process of heavy oily sewage, many kinds of chemicals are used, such as: degreasing agent, reverse phase demulsifier, coagulant, silicon removing agent, filter aid, etc. The slick oil is recycled into the original dehydration system. At present, the use effect of a single agent can be evaluated and determined by relevant methods, but the evaluation results ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/40
Inventor 李泽勤任红宇谭宏智
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU
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