Oilfield old emulsified oil treatment method and treatment device

Abstract

The invention discloses an oilfield old emulsified oil treatment method. The oilfield old emulsified oil treatment method is characterized by comprising the following steps: A, after enabling old emulsified oil to enter a quenching and tempering tank, adding saline water or seawater into the quenching and tempering tank as a catalyst; then raising the temperature through a heat exchanger; B, dividing the old emulsified oil into four phases in an old emulsified oil physical emulsion-breaking purification device, such as a purified oil region on an upper layer, an ash layer region on a middle layer, a water region on a lower layer and a mud layer on a bottom layer; C, firstly, enabling incoming liquid of the old emulsified oil to pass through a plasma pulse emulsion-breaking electrode region and enabling separated water to pass through an admittance instrument or an adjusting water tank to control water level height; D, enabling dispersed crude oil to continually float upward to reach an electrode dehydration region; carrying out deep oil-water separation in the region; E, enabling ash-layer impurities discharged by an old emulsified oil purification device to enter an ash layer treatment device; finishing solid-liquid separation and sewage purification on the ash layer in the treatment device. The method disclosed by the invention is simple; when the method is used, the purification and separation efficiency of the old emulsified oil can be effectively improved; the energy consumption is low, discharged substances have no pollution and great economic benefits can be produced.

Description

technical field [0001] The invention relates to the technical field of petroleum processing, in particular to a treatment method and a treatment device for old emulsified oil in an oilfield. Background technique [0002] Old emulsified oil is a by-product of crude oil produced during the ground transportation, storage and treatment of the produced fluid in the process of oilfield exploitation due to processes, addition of chemicals, etc. Pool (cabin), accident pool, old emulsified oil pool (tank). Old emulsified oil is a mixture of heavy crude oil, bitumen, water, sediment and various surfactants, generally composed of oil-in-water (O / W), water-in-oil (W / O) and suspended solids (containing about 1 -5% mechanical impurities), and emulsified fully, high viscosity, belonging to a very stable, viscous multi-phase system, emulsified oil formed after long-term enrichment. During the formation process of the old emulsified oil, due to the chemical reaction and the mixing of emu...

AI Technical Summary

Problems solved by technology

The water and mud treatment rate of this centrifugal treatment method can reach about 90%, but the energy consumption is huge, and the production cost of electricity is high, which is not conducive to widespread production

Using centrifugation to treat old emulsified oil results in a short-term reduction in the amount of old emulsif

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