Evaluation system and evaluation method for demulsification and dehydration performance of oil field

Abstract

The invention discloses an evaluation system and an evaluation method for demulsification and dehydration performance of an oil field. The evaluation system for demulsification and dehydration performance of an oil field comprises a produced liquid preparation unit, a demulsifier injection unit, a demulsification and dehydration performance evaluation unit, an experimental medium recovery unit andan experiment control unit. The produced liquid preparation unit and the demulsifier injection unit are communicated with the demulsification and dehydration performance evaluation unit through liquid supply pipelines. The experiment medium recovery unit is communicated with the demulsification dehydration performance evaluation unit through a medium recovery pipeline, the produced liquid preparation unit is used for preparing emulsion of crude oil and water, the demulsifier injection unit is used for injecting a demulsifier into the emulsion, and the experiment control unit is used for controlling the temperature and the pressure in the demulsification dehydration process of the emulsion. The demulsification and dehydration performance evaluation unit is used for acquiring crude oil andwater quality information of different liquid level layers in the demulsification and dehydration process of the emulsion and generating dehydrated crude oil and dehydrated sewage, and the experimentmedium recovery unit is used for recovering the dehydrated crude oil and the dehydrated sewage.

Description

technical field [0001] The disclosure relates to the technical field of oil field surface gathering and transportation, in particular to an evaluation system and evaluation method for oil field demulsification and dehydration performance. Background technique [0002] In the process of oilfield production, oil well production fluid contains crude oil and water, and crude oil and water form a relatively stable emulsion under the action of surface active substances such as colloids and asphaltenes in crude oil. The emulsion mostly exists in the state of water-in-oil (expressed as W / O, W is the abbreviation of Water, representing water, O is the abbreviation of Oil, representing oil), and may contain There are oil-in-water (expressed in O / W) and "oil-in-water-in-oil" (expressed in O / W / O) or "water-in-oil-in-water" (expressed in W / O / W), etc. In emulsion form. [0003] One of the important tasks of the oil field surface gathering and transportation treatment process is to reali...

AI Technical Summary

Problems solved by technology

However, the current laboratory test devices and methods are not consistent with the actual working conditions of industrial production, and the actual parameters of demulsification and dehydration in industrial production cannot be accurately obtained.

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