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首页> 外文会议>SPE Asia Pacific improved oil recovery conference (APIORC 01) >Microbial Enhanced Oil Recovery (MEOR) Technology in Bokor Field, Sarawak
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Microbial Enhanced Oil Recovery (MEOR) Technology in Bokor Field, Sarawak

机译：砂拉越波哥油田的微生物强化采油（MEOR）技术

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Bokor field was selected as the first field in Malaysia forrnMicrobial Enhanced Oil Recovery (MEOR) technologyrnapplication which utilizes micro-organisms to facilitate,rnincrease or extend oil production from reservoir through thernproduction of biochemical such as biosurfactant, solvents,rngases and weak acids. The field was selected due to its highrnviscosity crude (4 to 10 cp) and low oil specific gravity of 200rnAPI which could resulted in low recovery factor in majorrnreservoirs ranges from 19% to 25% of its original oil in place.rnThis technology also seems to be attractive for the field as itrnwas initially thought to be potential for for reducing thernviscosity of the oil and thus improve oil recovery. In addition,rnreservoir properties for major reservoirs in Bokor fieldrnconform to the basic screening criteria of the MEORrnapplication.rnThis paper mainly discusses the results of the pilot projectrnon MEOR technology application in Bokor field1. A feasibilityrnstudy focusing on candidate selection and comprehensivernlaboratory analysis was conducted to investigate the feasibilityrnof this technology for improving oil production/recovery.rnGenerally, the feasibility study had indicated that there is arnpotential oil production improvement with no near wellborernimpairment. Biodegradation study on the crude samplernindicates complete removal of normal/branched alkanes andrnpartial removal of aromatics due to in-reservoir alteration.rnLaboratory inoculation on the wellhead crude sample indicatedrnthat the microbes were able to slightly reduce the viscosity,rnbreak the emulsion and increase the solubility of highrnmolecular weight component without damaging the reservoir.rnIn order to prove the laboratory results and further assess thernimpact to oil production, a pilot test on three (3) selected wellsrnwere carried out. A comprehensive monitoring strategy wasrndeveloped and the performances were monitored for 5 - 6rnmonths.rnOver 5 months period, results from the pilot were found tornbe encouraging. Significant increase in oil production rate andrnreduction of water cut were observed demonstrating therneffectiveness of MEOR application. The average oilrnproduction rate for the period increases by 270 b/d which isrnequivalent to 47% oil incremental.
机译：Bokor油田被选为马来西亚最早的微生物增强油采收（MEOR）技术应用领域，该技术利用微生物通过生化化学物质（如生物表面活性剂，溶剂，沼气和弱酸）的生产来促进，增加或扩展油层的采油量。选择该油田是因为其高粘度原油（4至10 cp）和低油比重200rnAPI，这可能导致主要储层的采收率低，其储量为原始油的19％至25％。由于它最初被认为具有降低油的粘度并因此改善采油率的潜力，因此对油田具有吸引力。此外，波哥尔油田主要储层的储层性质符合MEORrn应用的基本筛选标准。本文主要讨论了波哥尔油田MEOR技术试点应用的成果。进行了以候选人的选择和综合实验室分析为重点的可行性研究，以研究该技术改善石油生产/采收率的可行性。通常，可行性研究表明，石油生产有一定的提高潜力，而没有井眼损害。对原油样品的生物降解研究表明，由于储层内的变化，正构/支链烷烃的完全去除和芳烃的部分去除。实验室对井口原油样品的接种表明，微生物能够稍微降低粘度，破坏乳状液并增加溶解度。为了证明实验室结果并进一步评估对产油量的影响，对三（3）个选定的井进行了试点测试。制定了全面的监视策略，对性能进行了5到6个月的监视。在5个月的时间里，该试验的结果令人鼓舞。观察到产油率的显着提高和含水率的降低，证明了MEOR应用的有效性。该时期的平均产油量增加了270 b / d，相当于47％的石油增产。

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