泌阳凹陷陆相页岩油气成藏条件

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1、学兔兔www.xuetutu.com天热乞比第32卷第4期0IL&GASGEOLOGY2011年8月文章编号：0253—9985(2011)04—0568—09泌阳凹陷陆相页岩油气成藏条件陈祥，王敏，严永新，章新文，罗曦，张永华(中国石化河南油田分公司，河南南阳473132)摘要：泌阳凹陷AS1井陆相页岩储层压裂后获得最高日产油4．68m、天然气90m，从而在我国东部陆相第三系断陷湖盆页岩油气领域取得了重要突破。页岩油与页岩气通常为共生关系，文章将重点应用地质实验、地质录井、测井等资料对泌阳凹陷深凹区AS1井井区的页岩分布特征、地化特征、储集特征及保存条件进行

2、分析。研究表明AS1井2450—2510Ill主力页岩段单层厚度大，分布范围广，有机碳含量较高，热演化程度镜质体反射率值一般在0．57％一0．72％，表明烃源岩处于成熟阶段和生烃高峰期。含油气页岩录井气测异常明显，测井曲线上具有“三高两低”的特征；页岩储集空间类型发育微孔隙、微裂缝，储集性能较好；储层石英等脆性矿物含量高，易于页岩油储层压裂改造。采用容积法对泌阳凹陷深凹区页岩油气资源量进行计算，得出泌阳凹陷页岩油气资源量5．4X10t，勘探潜力较大，勘探前景良好。关键词：有机质丰度；热成熟度；成藏条件；陆相页岩油气；泌阳凹陷中图分类号：TEl21．1文献标识码

3、：AAccumulationconditionsforcontinentalshaleoilandgasintheBiyangDepressionChenXiang，WangMin，YanYongxin，ZhangXinwen，LuoXiandZhangYonghua(SINOPECHenanOilfieldCompany，Nanyang，Henan473132，China)Abstract：TheAS1WellinthecontinentalshalereservoirinBiyangDepressionreachedapeakproductionofoil

4、4．68m／dandgas90m／dafterhydraulicfracturingstimulation．markingamajorbreakthroughinshaleoil&gasexplorationanddevelopmentintheEogenecontinentalfaultedbasinsineasternChina．Oilinshaleisoftensymbioticwithgas．Thedatagatheredfromgeologicalexperiments，welllogging，etc．，areusedtoanalyzeshaledi

5、stribution，organicgeochemicalfeatures，reservoircharacteristicsandsealingconditionsofAS1．Resultsshowthatmajorshalelayerswithintheintervalof2450——2510minwellAS1featureingreatthicknessandwidedistributionofasinglelayer，highTOCandaRwithin0．57％一0．72％，indicatingthatthesourcerocksarematurit

6、yandinpeakhydrocarbongeneration．R。Gasloggingofshaleoil&gaslayersshowabnormalresultsandtheloggingcurvepresentspecialfeaturesof“3highpointsand2lowpoints”．Shalelayerscontainwell—devel—opedmicro—poresandfissures，whichcanbeexcellentreservoirspace．Thelayersarealsorichinbrittleminer—alslik

7、equarts，whichisfavorableforfracturing．Afterassessmentbyusingthevolumetricmethod，webelievethattheDepressionhasgreatshaleoilandgasexplorationpotentialfabout0．54billiontonsofshaleoil&gas)．Keywords：Organicmatterabundance；thermalevolution；accumulationcondition；continentalshaleoilandgas；B

8、iyangDepression页岩油气