鄂尔多斯盆地榆林气田山二段沉积微相及砂体展布规律
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摘要
为鄂尔多斯盆地榆林气田山西组第二段(山二段)气藏得到高效的开发,作者通过钻井岩心、测井、地震及分析测试资料,结合前人研究成果,确定榆林气田山二段属于海相辫状河三角洲沉积体系,气田处在三角洲平原-前缘亚相带,可识别出水上和水下分流河道、天然堤、决口扇、分流间湾或分流间沼泽及洪泛平原等微相;在沉积微相分析基础上,通过辫状河三角洲沉积模式和岩相古地理编图,揭示了鄂尔多斯榆林气田山二段的砂体展布。结果表明榆林气田山二段的水上和水下分流河道砂体最有利于储层发育。
According to the comprehensive studies of well loggings,cores,seismic information and previous researches,the authors conclude that Member 2 of Lower Permian Shanxi Formation belongs to the marine facies braided-river delta system.The research area belongs to river delta plain-front subfacies belt.These micro-facies,including distributary channel,underwater distributary channel,crevasse splay,natural levee,interdistributary bay or interdistributary swamp and flood plain,can be identified in this belt.The typical braided river delta sedimentary model of Member 2 of Shanxi Formation in the Yulin gas field and the lithofacies paleogeographic map reveal the sandbody distribution of Member 2 Shanxi Formation in the Yulin gas field of Ordos Basin.The conclusion shows that the water and underwater distributary channel sandbodies of Member 2 of Shanxi Formation in the Yulin gas field are most favorable for the development of reservoirs.
According to the comprehensive studies of well loggings,cores,seismic information and previous researches,the authors conclude that Member 2 of Lower Permian Shanxi Formation belongs to the marine facies braided-river delta system.The research area belongs to river delta plain-front subfacies belt.These micro-facies,including distributary channel,underwater distributary channel,crevasse splay,natural levee,interdistributary bay or interdistributary swamp and flood plain,can be identified in this belt.The typical braided river delta sedimentary model of Member 2 of Shanxi Formation in the Yulin gas field and the lithofacies paleogeographic map reveal the sandbody distribution of Member 2 Shanxi Formation in the Yulin gas field of Ordos Basin.The conclusion shows that the water and underwater distributary channel sandbodies of Member 2 of Shanxi Formation in the Yulin gas field are most favorable for the development of reservoirs.
引文
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[13]韩会平,侯云东,武春英.鄂尔多斯盆地靖边气田山西组23段沉积相与砂体展布[J].油气地质与采收率,2007,14(6):50-55.Han H P,Hou Y D,Wu C Y,et al.Sedimentaryfacies and sandbody distribution of the Member 2-3of Shanxi Formation in Jingbian Gasfield,Ordos ba-sin[J].Petroleum Geology and Recovery Efficien-cy,2007,14(6):50-55.(In Chinese)
[2]王华,郑荣才,周祺,等.鄂尔多斯盆地长北气田山2段三角洲沉积体系和砂体展布特征[J].岩性油气藏,2008,20(2):22-28.Wang H,Zheng R C,Zhou Q,et al.Delta deposi-tional system and sandbody distribution of the secondmember of Shanxi Formation in Changbei gasfield,Ordos basin[J].Lithologic Reservoirs,2008,20(2):22-28.(In Chinese)
[3]孟军田,贾会冲.鄂尔多斯盆地北部塔巴庙地区上古生界天然气地质特征与勘探前景[J].石油实验地质,2003,25(6):708-711.Meng J T,Jia H C.The geological properties of nat-ural gas and exploration prospects of Upper Paleozoicin Tabamiao area,north Ordos basin[J].PetroleumGeology&Expeximent,2003,25(6):708-711.(InChinese)
[4]郝蜀民,李良,尤欢增.大牛地气田石炭—二叠系海陆过渡沉积体系与近源成藏模式[J].中国地质,2007,34(4):606-611.Hao S M,Li L,You H Z.Permo-Carboniferousparalic depositional systems in the Daniudi gas fieldand its near-source box-type gas accumulation form-ing mode[J].China Geology,2007,34(4):606-611.(In Chinese)
[5]郑荣才,周祺,王华,等.鄂尔多斯盆地长北气田山2段高分辨率层序分析及砂体预测[J].高校地质学报,2009,15(1):70-79.Zheng R C,Zhou Q,Wang H,et al.The sequencearchitecture and sandbody prediction of the secondmember of Shanxi Formation in Changbei gas field,Ordos basin[J].Geological Journal of China Univer-sities,2009,15(1):70-79.(In Chinese)
[6]王怀厂,魏新善,白海峰.鄂尔多斯盆地榆林地区山西组2段高效储集层形成的地质条件[J].天然气地球科学,2005,16(3):319-323.Wang H C,Wei X S,Bai H F.Forming geologiccondition of the Shan-2Formation high efficient res-ervoir in Yulin area of Ordos basin[J].Natural GasGeoscience,2005,16(3):319-323.(In Chinese)
[7]刘岫峰.沉积岩实验室研究方法[M].北京:地质出版社,1991:236-240.Liu Y F.The Research Methods of Sedimentary Rockin Laboratory[M].Beijing:Geology Press,1991:236-240.(In Chinese)
[8]谭晨曦,李文厚,张慧军,等.鄂尔多斯盆地大牛地气田山西组沉积相研究[J].西北大学学报:自然科学版,2011,41(1):107-112.Tan C X,Li W H,Zhang H J,et al.Study of thesedimentary facies of Shanxi formation in Daniudi gas-field of Ordos basin[J].Journal of Northwest Uni-versity(Natural Science Edition),2011,41(1):107-112.(In Chinese)
[9]尤欢增,赵俊兴,陈洪德,等.大牛地气田东北地区山西组-下石盒子组沉积特征及发育模式[J].成都理工大学学报:自然科学版,2007,34(4):401-406.You H Z,Zhao J X,Chen H D,et al.Depositionalcharacteristic and depositional model of Shanxi Forma-tion to Xiashihezi Formation in the Daniudi gas field,Ordos basin,China[J].Journal of Chengdu Universi-ty of Technology(Science&Technology Edition),2007,34(4):401-406.(In Chinese)
[10]Cross T A.High-resolution stratigraphic correlationfrom the perspective of base-level cycles and sedi-ment accommodation[C]//Proceedings of North-western European Sequence Stratigraphy Congress,1994:105-123.
[11]郑荣才,文华国,梁西文.鄂尔多斯盆地上古生界高分辨率层序地层分析[J].矿物岩石,2002,22(4):66-74.Zheng R C,Wen H G,Liang X W.Analysis ofhigh-resolution sequence stratigraphy for Upper Pa-leozoic in Ordos basin[J].Mineralogy and Petrolo-gy,2002,22(4):66-74.(In Chinese)
[12]郑荣才,柯光明,文华国,等.高分辨率层序分析在河流相砂体等时对比中的应用[J].成都理工大学学报:自然科学版,2004,31(6):641-647.Zheng R C,Ke G M,Wen H G.Isochronic correla-tion of fluvial sandbodies by high-resolution sequencetechnique[J].Journal of Chendu University ofTechnology(Science&Technology Edition),2004,31(6):641-647.(In Chinese)
[13]韩会平,侯云东,武春英.鄂尔多斯盆地靖边气田山西组23段沉积相与砂体展布[J].油气地质与采收率,2007,14(6):50-55.Han H P,Hou Y D,Wu C Y,et al.Sedimentaryfacies and sandbody distribution of the Member 2-3of Shanxi Formation in Jingbian Gasfield,Ordos ba-sin[J].Petroleum Geology and Recovery Efficien-cy,2007,14(6):50-55.(In Chinese)
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