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Heavy oil recovery process using extremophile anaerobic indigenous microorganisms

机译:利用极端微生物厌氧性原生微生物回收重油的过程

摘要

A process for increasing recovery of heavy oil with an API gravity equal to or greater than 10, contained in carbonate and/or sandstone porous media using extremophile (thermophilic, halotolerant and barotolerant) anaerobic indigenous microorganisms. The process involves nutrient injection to stimulate activity of extremophile anaerobic indigenous microorganisms at the well bottom, promoting the production of metabolites which improve oil mobility and increase oil recovery. Stimulation of extremophile anaerobic indigenous microorganisms and their metabolite production is conducted under anaerobic conditions at temperatures of 45 to 90° C., NaCl concentrations of 5,000 to 40,000 mg/L and pressures of 0.795 to 169 Kg/cm2 (11.3 to 2,400 psi). Heavy oils are recovered with API gravity equal to or greater than 10 degrees. The process enables up to 21% oil recovery in addition to the waterflooding process in porous media.
机译:一种使用极端微生物(嗜温,耐盐和耐压性)厌氧性土著微生物提高碳酸盐和/或砂岩多孔介质中所含API重力等于或大于10的重油回收率的方法。该过程涉及营养注入,以刺激井底嗜极端微生物厌氧性土著微生物的活动,促进代谢产物的产生,从而改善油的流动性并提高油的采收率。在温度为45到90°C,NaCl浓度为5,000到40,000 mg / L,压力为0.795到169 Kg / cm 2 (11.3至2,400 psi)。以API重力等于或大于10度回收重油。除了在多孔介质中进行注水工艺外,该工艺还可以实现高达21%的石油采收率。

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