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ID:36770099
大小:1.24 MB
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时间:2019-05-15
《哈萨克斯坦南土尔盖盆地A区块岩性油气藏》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、石油勘探与开发5702011年1O月PETROLEUMEXPLORATIONANDDEVELOPMENTVo1.38No.5文章编号:1000—0747(2011)o5.0570.06哈萨克斯坦南土尔盖盆地A区块岩性油气藏尹微,一,张明军2,孔令洪2(1.中国地质大学(北京);2.中国石油勘探开发研究院)基金项目:国家科技重大专项课题“大型油气田及煤层气开发—2、不发育,寻找岩性.地层油气藏是勘探突破的关键。已有钻井结果显示,A区块岩性油气藏主要位于侏罗系,其自下而上可分为5套地层:埃巴林组、多尚组、卡拉甘塞组、库姆科尔组和阿克萨布拉克组。通过对侏罗系储集层,烃源岩、储盖组合等方面研究,认为目的层发育3种类型岩性油气藏:斜坡带前缘砂上倾尖灭型油气藏、水下分流河道孤立砂体型油气藏及河口坝孤立砂体型油气藏,已发现的A12井油藏属于中孔中渗的斜坡带前缘砂上倾尖灭型油藏,为油气自生自储和侧向运移共同作用的结果。综合分析油气成藏条件认为,研究区成藏的主控因素为有效储盖组合。结合多种地质、地球物理勘探方法分析3、得出,A区块的油气远景区集中分布于区块中部和西侧斜坡。图5表2参19关键词:油气藏特征;油气远景区;岩性.地层油气藏;南土尔盖盆地;哈萨克斯坦中图分类号:TEl22.2文献标识码:ALithologicreservoirsinBlockAintheSouthTurgayBasin,KazakhstanYinWei’。,ZhangMingjun,KongLinghong(1.ChinaUniversityofGeosciences,Beijing100083,China;2.PetroChinaResearchInstituteofPetr4、oleumExploration&Development,Beijing100083,China)Abstract:BlockAintheSouthTurgayBasin,Kazakhstan,liesinagentleslopezoneofriftedlakebasin,wherestmctura1trapsarenotdeveloped,SOitisimportantforexplorerstofindlitho—stratigraphicreservoirs.Thedrillingrecordsshowthat,inBlockA,l5、ithologicreservoirsareintheJurassicSystem,containing5formationsfrombottomtotop:Aybolin,Doshan,Karaganshy,KumkolandAkshabulak.ThroughtheresearchonJurassicreservoirs,sourcerocksandreservoir-sealassemblage,itisproposedthattherearethreetypesoflithologicreservoirsatthetargetfo6、rmation:reservoirswithsandsupdippinch-outatfrontofslopezone,reservoirswithisolatedsandsinunderwaterdistributarychannels,andreservoirswithisolatedsandsatmouthbar.WellA12isamiddle-porositymiddle-permeabilityreservoirwithsandsupdippinch—outatfrontofslopezone,whichwasafectedj7、ointlybyselfgeneration—selfpreservationandlateralmigrationofhydrocarbons.Thecomprehensiveanalysisofaccumulationconditionsshowsthattheefectivereservoir-sealassemblageisthemaincontrollingfactorforaccumulation.Withseveralgeologicalandgeophysicalmethods,itisconcludedthatthepr8、ospectsareliedincentralandwestpartsofBlockA.Keywords:reservoircharacteristics;prospects;litho—st
2、不发育,寻找岩性.地层油气藏是勘探突破的关键。已有钻井结果显示,A区块岩性油气藏主要位于侏罗系,其自下而上可分为5套地层:埃巴林组、多尚组、卡拉甘塞组、库姆科尔组和阿克萨布拉克组。通过对侏罗系储集层,烃源岩、储盖组合等方面研究,认为目的层发育3种类型岩性油气藏:斜坡带前缘砂上倾尖灭型油气藏、水下分流河道孤立砂体型油气藏及河口坝孤立砂体型油气藏,已发现的A12井油藏属于中孔中渗的斜坡带前缘砂上倾尖灭型油藏,为油气自生自储和侧向运移共同作用的结果。综合分析油气成藏条件认为,研究区成藏的主控因素为有效储盖组合。结合多种地质、地球物理勘探方法分析
3、得出,A区块的油气远景区集中分布于区块中部和西侧斜坡。图5表2参19关键词:油气藏特征;油气远景区;岩性.地层油气藏;南土尔盖盆地;哈萨克斯坦中图分类号:TEl22.2文献标识码:ALithologicreservoirsinBlockAintheSouthTurgayBasin,KazakhstanYinWei’。,ZhangMingjun,KongLinghong(1.ChinaUniversityofGeosciences,Beijing100083,China;2.PetroChinaResearchInstituteofPetr
4、oleumExploration&Development,Beijing100083,China)Abstract:BlockAintheSouthTurgayBasin,Kazakhstan,liesinagentleslopezoneofriftedlakebasin,wherestmctura1trapsarenotdeveloped,SOitisimportantforexplorerstofindlitho—stratigraphicreservoirs.Thedrillingrecordsshowthat,inBlockA,l
5、ithologicreservoirsareintheJurassicSystem,containing5formationsfrombottomtotop:Aybolin,Doshan,Karaganshy,KumkolandAkshabulak.ThroughtheresearchonJurassicreservoirs,sourcerocksandreservoir-sealassemblage,itisproposedthattherearethreetypesoflithologicreservoirsatthetargetfo
6、rmation:reservoirswithsandsupdippinch-outatfrontofslopezone,reservoirswithisolatedsandsinunderwaterdistributarychannels,andreservoirswithisolatedsandsatmouthbar.WellA12isamiddle-porositymiddle-permeabilityreservoirwithsandsupdippinch—outatfrontofslopezone,whichwasafectedj
7、ointlybyselfgeneration—selfpreservationandlateralmigrationofhydrocarbons.Thecomprehensiveanalysisofaccumulationconditionsshowsthattheefectivereservoir-sealassemblageisthemaincontrollingfactorforaccumulation.Withseveralgeologicalandgeophysicalmethods,itisconcludedthatthepr
8、ospectsareliedincentralandwestpartsofBlockA.Keywords:reservoircharacteristics;prospects;litho—st
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