Super heavy oil sagd circulating preheating liquid treatment system

Abstract

The invention discloses a super heavy oil SAGD circulation preheating liquid processing system. The processing system comprises a vapor and liquid separator, a spray-type cooler, a tubular reactor, an oil, mud and water three-phase separator and a vapor heating crude oil gravity settler. The spray-type cooler comprises a cooling tank, located a sprayer and a The oil, mud and water three-phase separator comprises a settlement tank, located The processing system also comprises a vapor conveying line, a first conveying line, a first switch valve, a second conveying line, a second switch valve, a crude oil transfer pump, a third conveying line, a third switch valve, a fourth conveying line, a fourth switch valve, a sewage discharging line, a sewage discharging pump, a purified water discharging line, a fifth switch valve, a mud discharging line, a sixth switch valve, a fifth conveying line, a purified oil discharging line and a purified oil discharging pump. The processing system is advantaged by low carbon and environmental protection and reduces energy consumption further.

Description

technical field [0001] The invention relates to a super-heavy oil SAGD (short for steam-assisted gravity drainage technology) circulating preheating fluid treatment device, in particular to a super-heavy oil SAGD circulating preheating fluid treatment system. Background technique [0002] Steam Assisted Gravity Drainage (SAGD for short) is a method of injecting steam from a vertical well or a horizontal well above a horizontal production well located near the bottom of the reservoir into the reservoir, heated crude oil and steam condensate The oil recovery method produced from horizontal wells at the bottom of the reservoir has the advantages of high oil recovery capacity, high oil-steam ratio, and high ultimate recovery factor. Therefore, it is a cutting-edge technology for developing super heavy oil. [0003] In the circulating preheating stage, as an indispensable production fluid (hereinafter referred to as "circulating fluid") treatment technology in the development pro...

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Problems solved by technology

In the actual production process, it is found that the ultra-heavy oil SAGD circulating fluid is different from the super-heavy oil SAGD conventional production fluid, and also different from the ultra-heavy oil sewage. It cannot meet the treatment requirements, so this part of the circulating fluid can only be discharged into the evaporation field to allow it to evaporate naturally. However, with the gradual increase in the production of super heavy oil SAGD, natural evaporation can no longer meet the requirements, and there is a huge environmental risk. The comprehensive processing performance of the heavy oil SAGD circulating preheating fluid has become a "bottleneck" problem hindering the scale-up of SAGD production

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