Preparation method of jelly-type oily sludge profile control agent

Abstract

A preparation method of a jelly-type oily sludge profile control agent comprises the following steps: adding oily sludge and water into a stirrer to be stirred and pre-treated to enable the viscosity of pre-treated oily sludge to be 0.3-0.5 Pa.s; adding an emulsifier into the pre-treated oily sludge to enable oily sludge to be fully dispersed; sequentially adding a zwitterionic polymer, a cross-linking agent and a jelly promoter; uniformly stirring to obtain the jelly-type oily sludge profile control agent. The preparation method is simple in manufacture process, economical and effective and suitable for on-site construction conditions, and can effectively prevent oily sludge from environmental pollution; oily sludge in the profile control agent comes from an oil reservoir, has good compatibility with the oil reservoir, and causes less damage to the oil reservoir; the jelly-type oily sludge profile control agent is good in jelly forming performance, adjustable in jelly forming strength, excellent in stability after felly forming and high in plugging strength and erosion resistance.

Description

technical field [0001] The invention belongs to the field of petroleum technology, and relates to the profile control part of water injection wells in the petroleum industry, in particular to a preparation method of a jelly-type oily sludge profile control agent. Background technique [0002] Oily sludge is the "waste" in the crude oil production process, and oily sludge will be generated in the process of oil extraction, gathering and processing. The existence of oily sludge makes the content of suspended solids in the reinjected sewage of the oilfield seriously exceed the standard, clogs the formation, causes the water absorption capacity of the oil layer to decrease, and the water injection pressure continues to rise. ; In order to ensure the quality of water injection and prevent the vicious cycle of suspended solids in the system, a large amount of sewage is forced to be discharged, which not only occupies a large amount of cultivated land, but also pollutes the soil, a...

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of preparation method of jelly type oily sludge profile control agent, this oily sludge profile control agent uses various sludge wastes produced in the crude oil production process As the basic raw material, it is prepared by adding various reagents. Because the oilfield sludge is treated and reinjected, it not only realizes the need for profile control of water injection wells, but also effectively reduces environmental pollution, thus solving the problem of oily sludge for a long time. Environmental pollution caused by exhaust emissions has important dual meanings for oilfield environmental protection and development