Analyzing ecological principles of microbial life and degradation in oil reservoirs

分析油藏微生物生命和降解的生态原理

• 批准号: 449062377
• 负责人: Professor Dr. Rainer Udo Meckenstock
• 金额: --
• 依托单位: Arbeitsgruppe Aquatische Mikrobiologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/449062377?language=en
• 关键词: Analyzing; ecological; principles; microbial; life

The current concept for microbial degradation in oil reservoirs states that the degradation takes place at the oil-water-transition-zone (OWTZ). However, we recently found complex microbial communities in tiny water droplets enclosed in oil of three natural oil seeps. Since we could show that the water originated from the oil reservoir, this indicated microbial degradation in the oil leg and not only at the OWTZ. Here, we want to verify if microbial degradation takes place in water pockets in the oil leg and what the ecological principles of microbial distribution are. To this end, we will sample freshly drilled oil production wells from a Chinese oil field over time. Following the microbial community composition and the degradation activity in the formation water, which only stems from the oil leg, over time, will allow analysing degradation in the oil leg and the spatial distribution of oil-degrading microorganisms. Furthermore, we will study wells that have coning of the below OWTZ and wells that are subject to secondary production by flooding which will provide indication on the differences of microbial degradation in the different compartments of the oil reservoir. The project is a collaboration in the frame of the call for Sino-German research proposals.

目前关于油藏中微生物降解的概念认为，降解发生在油水过渡带（OWTZ）。然而，我们最近发现，复杂的微生物群落在微小的水滴封闭在石油的三个天然油渗漏。由于我们可以证明水来自储油层，这表明微生物降解不仅发生在OWTZ，也发生在油段。在这里，我们想验证微生物降解是否发生在油段的水囊中，以及微生物分布的生态学原理是什么。为此，我们将对中国油田新钻的石油生产威尔斯井进行取样。随着时间的推移，地层水中的微生物群落组成和降解活性（仅源于油相）将允许分析油相中的降解和石油降解微生物的空间分布。此外，我们还将研究OWTZ以下有锥进的威尔斯井和通过注水进行二次生产的威尔斯井，这将提供油藏不同隔室中微生物降解差异的指示。该项目是在征求中德研究建议的框架内进行的合作。