安塞油田长 10_1储层成岩作用及岩相研究

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1、复杂油气藏第6卷第4期ComplexHydrocarbonReservoirs2013年12月安塞油田长1O储层成岩作用及岩相研究李涛，赵爱彬，王军，杨孝(1．中国石油长庆油田分公司油藏评价处，陕西西安710018，2．中国石油长庆油田分公司第四采油厂，陕西靖边718500)摘要：安塞油田G52井区长1O。储层属低孔、中低渗一低渗储层，孔喉以中、细喉为主，具有粒度较粗，成分成熟度低，结构成熟度较高的特点。运用铸体薄片、X衍射、电镜扫描、镜质体反射率测定及物性分析等资料，研究了其成岩作用特征，确定成岩阶段主要处于中成岩的A期中

2、亚期一B期。依据成岩作用类型及储层物性特征，划分出7种成岩相，其中强溶蚀成岩相和溶蚀成岩相孔隙度高、渗透率好、含油性好，是研究区最有利的油气储集相带；长石溶蚀一绿泥石膜胶结成岩相物性次之．含油性较差；压实固结成岩相、粘土矿物胶结成岩相、致密胶结成岩相和胶结成岩相物性最差，不利于油气储集。关键词：成岩作用岩相划分长10储层安塞油田中图分类号：TEl22．2文献标识码：AStudyonthediagenesisanddiageneticfaciesofChang101reservoirinAnsaiOilfieldLiTao，Z

3、haoAibin，WangJun，YangXiao(1．D印artmentofReservoirEvaluationofChangqingOilfieldCompany，Petrochina，Xian，Shanxi710018；2．TheFourthOilProductionPlantofChangqingOilfieldCompany，PetroChina，Jingbian，Shanxi718500)Abstract：TheChangl0lreservoirinAnsaiOilfieldbelongstolowporosi

4、tyandmiddle—lowpermeabilityreservoir．Theporethroats，whicharemainlysmall—middleporethroats，werecharacterizedbycoarsergranularity，lowercompositionalma-turity，andhighertexturalmaturity．Basedonthedataofcastingslice，Xraydiffraction，scanningelectronmicroscope，vitrinitere

5、flectanceandphysicalpropertyanalysis，westudiedthediageneticcharacteristicsofChangl0lreservoir，anddeterminedthatthediageneticstageofthereservoirismainlythesubageperiodofthediageneticstageAandthediageneticstageB．Ac-cordingtodiagenesispatternsandreservoirphysicalprope

6、rtycharacteristics，thereservoirwasclassifiedintosevenkindsofdiageneticfacies．Amongthem，thestrongcorrosionfaciesandcorrosionfacieshavinghighporosityandpermeability，andgoodoil—bearingpropertyarethemostbeneficialreservoirfacies，thefeldsparcorrosion—chloritecementation

7、facieswithworseoil—bearingpropertycomesecond，thecompaction—consolidationfacies，clayminerMcementationfacies，densece—mentationfaciesandcementationfacieswiththeworstphysicalproperty，areunfavourabletothehydrocarbonaccumulation．Keywords：diagenesis；diageneticfacies；Chang

8、l01reservoir；AnsaiOilfield安塞油田G52井区长10油藏是长庆油田近年本次研究以长10为主，长10储层非均值性强，物来发现的新层系油藏，位于鄂尔多斯盆地东部，地处性变化大，优质储层寻找难度较大，考虑成岩作用直陕北斜坡，构造平缓，整体上呈现为向西倾斜的单斜接影响着储层