本源微生物驱油渗流场-微生物场耦合数学模型

第31卷第6期石油学报V01．31No．62010年11月ACTAPETRoI。EIS1NICANov．2010文章编号：0253—2697(2010)06—0989—04本源微生物驱油渗流场一微生物场耦合数学模型修建龙1俞理2郭英3(1．中国科学院渗流流体力学研究所河北廊坊065007；2．中国石油勘探开发研究院廊坊分院河北廊坊065007；3．中国石油大庆油田有限责任公司勘探开发研究院黑龙江大庆163712)摘要：通过对本源微生物驱油机理的研究，从好氧、厌氧两步激活理论出发，建立了一个全新的本源微生物驱油渗流场一微生物场耦合的数学模型，并给出了数值模型的求解思路。在该模型中，微生物作用下的渗流方程是时间和空间的函数，阐述了微生物本身及3类主要代谢产物(表面活性剂、聚合物及气体)对物性参数的作用与影响，同时渗流方程也体现了微生物采油的主要作用机理。微生物方程以网格内的物质均匀分布为基本假设，阐述了由于流体流动造成的物质分布的变化规律和微生物群落间的级联代谢过程。该模型为本源微生物驱油数值模拟软件的研发提供了理论依据。关键词：本源微生物；渗流场；微生物场；耦合；数学模型中图分类号：TE34文献标识码：AAmathematicalcouplingmodelofseepagefieldandmicrobialfieldintheindigenousmicrobeenhancingoilrecoveryXIUJianlon91YULi2GUOYin93(1．InstituteofPorousFlow&FluidMechanics，ChineseAcademyofSciences，Langfang065007，China；2．LangfangBranch，PetroChinaResearchInstituteofPetroleumExploration&Development，Lang，口ng065007，China；3．ResearchInstituteofExploration&Development，PetroChinaDaqingOilfieldCompanyLtd．。Daqing163712。China)Abstract：Basedonthetwo-step(aerobic／anaerobic)stimulationtheory，thepresentpaperstudiedtheindigenousmicrobialenhancedoilrecovery(IMEOR)mechanismandestablishedanewmathematicalmodelcoupledbytheseepagefieldandmicrobialfield，whichsolvedacoupleofproblemsinthisnumericalmodel．Forinstance，aseepageequationundertheactionofmicroorganismswasarune-tionoftimeandspace，whichelaboratedimpactsofmicroorganismsandtheirthreemajormicrobialmetabolites(surfactant，polymerandgas)onseveralphysicalpropertyparameters．Meanwhile，theseepageequationreflectedsomeprimarymechanisms(emulsifica—tion，viscosityreductionandprofilecontr01)ofthemicrobialenhancedoilrecovery．Themicrobialequationinfluencedbywaterflowwasbasedontheassumptionthatmaterialsingridsweredistributedevenly。whichindicatedthattheseepagefieldandmicrobialfieldmustbesolvedsimultaneouslyduetOvariationsinthematerialdistributionrelatedwithfluidflow，thecascademetabolicprocessa—mongmicrobialcommunitiesandthecouplingofthesetWOfields．Insum，themodelhasimprovedtheexistingmathematicalmodelfortheindigenousmicrobialenhancedoilrecovery。andprovidedatheoret