鄂尔多斯盆地东部奥陶系古沟槽三维地震识别方法
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摘要
鄂尔多斯盆地东部下奥陶统风化壳为该区下古生界气藏的主力储层,勘探表明该气藏严格受古岩溶尤其是古沟槽的控制。前人用印模法识别沟槽,预测精度相对较低。采用新的三维地震古地貌研究方法,对富县区块的风化壳沟槽进行了识别。应用本方法不仅识别出了较大的主沟槽,而且还预测出了次级分支沟槽。预测结果为区内下古生界井位部署提供了依据,并提出了一套古沟槽三维地震识别的新方法。
The carbonate weathering crust is a major gas reservoir of the Lower Paleozoic period in the eastern Ordos Basin.The petroleum exploration results proved that the reservoir properties were strictly controlled by palaeokarst,especially by the configuration of erosion flutes.The identification accuracy of the erosion flutes is relatively low using the conventional thickness methods.A new method for recognizing the erosion landform characteristics is proposed on the basis of the 3D seismic geomorphology.The application of the new method in Fuxian area of the eastern Ordos Basin provides the high-precision palaeokarsts distribution for the exploratory well planning.The combination of the 3D seismic geomorphology with the seismic attribute images is valuable for the identification of the Ordovician erosion flutes and can reduce drilling risks.The 3D seismic identification method is proposed for recognizing the erosion flutes.
The carbonate weathering crust is a major gas reservoir of the Lower Paleozoic period in the eastern Ordos Basin.The petroleum exploration results proved that the reservoir properties were strictly controlled by palaeokarst,especially by the configuration of erosion flutes.The identification accuracy of the erosion flutes is relatively low using the conventional thickness methods.A new method for recognizing the erosion landform characteristics is proposed on the basis of the 3D seismic geomorphology.The application of the new method in Fuxian area of the eastern Ordos Basin provides the high-precision palaeokarsts distribution for the exploratory well planning.The combination of the 3D seismic geomorphology with the seismic attribute images is valuable for the identification of the Ordovician erosion flutes and can reduce drilling risks.The 3D seismic identification method is proposed for recognizing the erosion flutes.
引文
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[11]张宏,郑浚茂,杨道庆,等.塔中卡塔克区块古岩溶储层地震预测技术[J].石油学报,2008,29(1):69-74.Zhang Hong,Zhen Junmao,Yang Daoqing,et al.Prediction ofpaleokarst reservoir in the southeastern slope of Tazhong area inTarim Basin using seismic techniques[J].Acta Petrolei Sinica,2008,29(1):69-74.
[12]Wood L J,Daniel Pecuch,Ben Schulein,et al.Seismic attributeand sequence stratigraphic integration methods for resolving res-ervoir geometry in San Jorge Basin,Argentina[J]The LeadingEdge,2000,19(9):952-962.
[13]Tye R S.Geomorphology:An approach to determining subsur-face reservoir dimensions[J]AAPG Bulletin,2004,88(8):1123-1147.
[14]Charlotte Sullivan E,Marfurt K J,Alfred Lacazette,et al.Appli-cation of new seismic attributes to collapse chimneys in the FortWorth Basin[J].Geophysics,2006,71(4):B111-B119.
[15]Satinder Chopra,Marfurt K J.Volumetric curvature attributesadd value to3D seismic data interpretation[J].The LeadingEdge,2007,26(7):856-867.
[2]冯增昭,鲍志东,康祺发,等.鄂尔多斯奥陶纪古构造[J].古地理学报,1999,1(3):83-93.Feng Zengzhao,Bao Zhidong,Kang Qifa,et al.Palaeotectonics ofOrdovician in Ordos[J].Journal of Palaeogeography,1999,1(3):83-93.
[3]何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003:66-83.He Zixin.Evolution and oil-gas of Ordos Basin[M].Beijing:Pe-troleum Industry Press,2003:66-83.
[4]何自新,郑聪斌,陈安宁,等.长庆气田奥陶系古沟槽展布及其对气藏的控制[J].石油学报,2001,22(4):35-38.He Zixin,Zheng Congbin,Chen Anning,et al.Distributive con-figuration of ancient valley trough on Ordovician erosion surfacein Changqing gas field and its control over gas accumulations[J].Acta Petrolei Sinica,2001,22(4):35-38.
[5]顾岱鸿,代金友,兰朝利,等.靖边气田沟槽高精度综合识别技术[J].石油勘探与开发,2007,34(1):60-64.Gu Daihong,Dai Jinyou,Lan Chaoli,et al.High-precision inte-grative recognition technology for flutings in Jingbian gas field,Ordos Basin[J].Petroleum Exploration and Development,2007,34(1):60-64.
[6]郑聪斌,冀小林,贾疏源.陕甘宁盆地中部奥陶系风化壳古岩溶发育特征[J].中国岩溶,1995,14(3):280-288.Zheng Congbin,Ji Xiaolin,Jia Shuyuan.Palaeokarst features ofOrdovician weathering crust in the centre of Shangganning basin[J].Carsologica Sinica,1995,14(3):280-288.
[7]郝蜀民,司建平,许万年.鄂尔多斯盆地北部古生代岩溶及有利油气勘探区块预测[J].中国岩溶,1994,13(2):176-188.Hao Sumin,Si Jianping,Xu Wannian.Paleozoic karst and predic-tion of prospective sites for petroleum exploration in north Ordosbasin[J].Carsologica Sinica,1994,13(2):176-188.
[8]夏日元,唐健生,关碧珠,等.鄂尔多斯盆地奥陶系古岩溶地貌及天然气富集特征[J].石油与天然气地质,1999,20(2):133-136.Xia Riyuan,Tang Jiansheng,Guan Bizhu,et al.Ordovician palae-okarst landform in Ordos basin and gas enrichment characteris-tics[J].Oil&Gas Geology,1999,20(2):133-136.
[9]代金友,何顺利.鄂尔多斯盆地中部气田奥陶系古地貌研究[J].石油学报,2005,26(3):37-43.Dai Jinyou,He Shunli.Ordovician paleokarst landform of CentralGas Field in Ordos Basin[J].Acta Petrolei Sinica,2005,26(3):37-43.
[10]Davies R J,Posamentier H W,Wood L J,et al.Seismic geomor-phology:Applications to hydrocarbon exploration and production[M].London:SEPM(Society for Sedimentary Geology)2007:1-14.
[11]张宏,郑浚茂,杨道庆,等.塔中卡塔克区块古岩溶储层地震预测技术[J].石油学报,2008,29(1):69-74.Zhang Hong,Zhen Junmao,Yang Daoqing,et al.Prediction ofpaleokarst reservoir in the southeastern slope of Tazhong area inTarim Basin using seismic techniques[J].Acta Petrolei Sinica,2008,29(1):69-74.
[12]Wood L J,Daniel Pecuch,Ben Schulein,et al.Seismic attributeand sequence stratigraphic integration methods for resolving res-ervoir geometry in San Jorge Basin,Argentina[J]The LeadingEdge,2000,19(9):952-962.
[13]Tye R S.Geomorphology:An approach to determining subsur-face reservoir dimensions[J]AAPG Bulletin,2004,88(8):1123-1147.
[14]Charlotte Sullivan E,Marfurt K J,Alfred Lacazette,et al.Appli-cation of new seismic attributes to collapse chimneys in the FortWorth Basin[J].Geophysics,2006,71(4):B111-B119.
[15]Satinder Chopra,Marfurt K J.Volumetric curvature attributesadd value to3D seismic data interpretation[J].The LeadingEdge,2007,26(7):856-867.
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