Pre-dehydrating agent technology evaluation method

Abstract

The invention provides a pre-dehydrating agent technology evaluation method, which comprises the following steps of: detecting the performance of a sample by taking a mixture of a pre-dehydrating agent and a station entering liquid as the sample and taking the oil content of dehydrated sewage, the suspended matter content of the dehydrated sewage, the dehydration rate, an oil-water interface and the cost consumption of a single liquid amount medicament as scoring items; and calculating the weighted score of each item according to the detection result of each item and the weight coefficient, and adding the weighted scores of each item to obtain the total score of the pre-dehydrant evaluation. The evaluation method provided by the invention can realize quantitative optimization of the pre-dehydrant, has the characteristics of systematization, scientization, standardization and operability, and provides a scientific decision basis for new pre-dehydrant products in oil field production application and pilot test experiments.

Description

technical field [0001] The invention relates to the technical field of oil field surface gathering and transportation production, in particular to a systematic evaluation method for pre-dehydrating agent technology. Background technique [0002] As the oilfield development enters the middle and late stages, the water cut in major oil areas generally reaches 60% to 80%. The main reason is that in order to maintain the stable production of crude oil, the water content of the produced fluid is continuously increased due to the adoption of various production stimulation measures, and the high water content of the produced fluid leads to an increase in the cost of thermochemical sedimentation (heat energy consumption, increased dosage of chemicals), and dehydration of crude oil in the produced fluid. Handling becomes more difficult. Pre-dehydrating agent is a chemical agent for low-temperature pre-dehydration treatment before crude oil demulsification and dehydration. Its main f...

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Problems solved by technology

[0003] At present, domestic oilfields evaluate the treatment effect of pre-dehydrating agents only unilaterally evaluate the effect of its pre-dehydration performance, lacking a balance between demulsification and dehydration effects and post-dehydration sewage treatment effects, as well as a system that has a weight relationship with unilateral liquid consumption costs There is a permanent pre-dehydrating agent technology evaluation system and standard. Once the above-mentioned phenomenon of taking care of one thing and losing another occurs in the treatment effect of the pre-dehydrating agent used in production, as well as the contradiction between the effect of pre-dehydration treatment and the cost of unilateral fluid consumption, it will affect the stability of oilfield production. and management problems

At present, domestic oil fields lack a systematic technical evaluation system and standard for pre-dehydrating agents that take into account the effect of demulsification treatment, the effect of dewatered sewage treatment, and the cost of single liquid consumption.

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