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J4 ›› 2015, Vol. 21 ›› Issue (4): 747-.DOI: 10.16108/j.issn1006-7493.2

• 其他自由来稿 • 上一篇    下一篇

老君庙油田古近系M层冲积扇低渗透 储层特征及形成机理

喻 宸,吴胜和,郑联勇,岳大力,张善严,王旭影   

  • 出版日期:2015-12-20 发布日期:2016-01-04

ReservoirCharacteristicsandFormationMechanismofMLayerin thePaleogeneLowPermeabilityandAlluvialFanReservoirinthe LaojunmiaoOilfield

YU Chen,WU Shenghe,ZHENG Lianyong,YUE Dali1,ZHANG Shanyan,WANG Xuyi   

  • Online:2015-12-20 Published:2016-01-04

摘要:

通过薄片、扫描电镜、阴极发光、岩心物性及测井曲线对老君庙油田古近系M层进行了储层特征与形成机理研究, 包括沉积储层基本特征、成岩作用及孔隙演化分析等。结果表明,M层为快速堆积下的沉积物,分选差,杂基含量高,总 体属于相对细粒的冲积扇相沉积;主要储集空间为粒间孔,为中孔低渗储层;成岩作用类型主要有压实、胶结和溶解作用 等。沉积作用控制了储层的原始孔隙度,杂基含量高,分选较差的储层原始物性差,主要分布在扇根片流带片流砂坝和扇 中漫流带;相比而言,低杂基含量,分选相对较好的辫流带砂岩受到碳酸盐胶结物的影响大,胶结作用进一步降低了这类 储层物性,使储层整体物性表现为低渗透。杂基含量和碳酸盐胶结是导致储层为低渗透的主要因素。

关键词: 细粒冲积扇, 低渗透, 成岩作用, 油气储层, M油层, 老君庙油田

Abstract:

Basedonagreatdealofthinsections,cathodoluminescence,electronmicroscopic,corephysicalpropertyandloggingdata,the characteristicsofreservoirandformationmechanismoftheMalluvialfanreservoirinLaojunmiaoOilfield,wasdiscussed,includingthe sedimentarycharacteristicsofreservoir,diagenesisandporosityevolutionwereanalyzed.TheresultsshowthatMreservoirhaverapid accumulation,poorsortingandhighmatrixcontents,itoverallbelongrelativefinealluvialfan.Themainreservoirspaceareintergranular poreswiththecharacteristicsofmediumporosityandlowpermeability.Thedominantdiagenesisinthestudyareahavecompaction, cementationanddenudation.Sedimentationcontrolledtheprimarypores.Thehighmatrixcontentsandpoorsortingresultinthepoorreservoirproperties.ThekindofreservoirisprimarilydistributioninSheetflooddepositionandbraidedriver.Incontrast,thelowmatrix contentsandgoodsortingofthebraided-streambeltreservoirisgreatlyaffectedbycarbonatecement.Carbonatecementfurtherreduce thereservoirphysicalproperties,whichresultinfeaturesoflowpermeableforMreservoir.Thecontentofmatrixandcarbonatecement aremajoraffectingfactorsforlowreservoirphysicalproperty,whichcausethequalitydifferenceanddistributionofreservoir.

Key words: :fine-grainedalluvialfan;lowpermeability;diagenesis;reservoirquality;Mreservoir;LaojunmiaoOilfield