鄂尔多斯盆地中部山西组三角洲—曲流河沉积
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摘要
目的探讨山西组汇水中心有无曲流河沉积。方法通过岩心观察、测井对比、三维地震综合解释等分析鄂尔多斯盆地中部山西组沉积相。结果大量的砂岩底部冲刷、心滩加积式和边滩退积式测井响应反映盆地中部三延地区山西组二段和一段可能为两个湖泊—三角洲—河流相旋回沉积,湖泊具多期小规模发育特点,三角洲前缘和河道砂体类型同时发育,是该区的主要储层类型。结论三延地区虽然是鄂尔多斯盆地的汇水中心,存在南北物源的三角洲沉积,但是三维地震平面图显示出了典型的曲流河道特征。
Aim To probe if meandering river exists in the catchment center of Shanxi Formation.Methods Associated with previous study results,well core,log and 3-D seismic data are integrated to probe whether fluvial deposition of Shanxi Formation exists in central Ordos basin which is considered to be an ancient large lake center.Results Shanxi Formation consists of two mid-term baselevel cycles of lacustrine-deltaic frontier-fluvial deposition.Lakes might occur to a small scale in the central area of the basin during several periods,where both deltaic and fluvial sandbodies distributed simultaneously.They are the main types of the gas reservoir in this region.Conclusion 3-D seismic horizon slices show classical meandering channel distribution of Shanxi Formation.It should be an irrefutable evidence of fluvial deposition.
Aim To probe if meandering river exists in the catchment center of Shanxi Formation.Methods Associated with previous study results,well core,log and 3-D seismic data are integrated to probe whether fluvial deposition of Shanxi Formation exists in central Ordos basin which is considered to be an ancient large lake center.Results Shanxi Formation consists of two mid-term baselevel cycles of lacustrine-deltaic frontier-fluvial deposition.Lakes might occur to a small scale in the central area of the basin during several periods,where both deltaic and fluvial sandbodies distributed simultaneously.They are the main types of the gas reservoir in this region.Conclusion 3-D seismic horizon slices show classical meandering channel distribution of Shanxi Formation.It should be an irrefutable evidence of fluvial deposition.
引文
[1]肖建新,孙粉锦,何乃祥,等.鄂尔多斯盆地二叠系山西组及下石盒子组盒8段南北物源沉积汇水区与古地理[J].古地理学报,2008,10(4):341-354.
[2]马强.延长油区上古生界物源及沉积相分析[D].西安:西北大学地质学系,2009.
[3]陈全红,李文厚,刘昊伟,等.鄂尔多斯盆地上石炭统—中二叠统砂岩物源分析[J].古地理学报,2009,11(6):629-641.
[4]庞军刚,李文厚,杨友运,等.鄂尔多斯盆地子洲地区上古生界沉积体系特征[J].天然气工业,2007,27(12):58-61.
[5]王超勇,陈孟晋,汪泽成,等.鄂尔多斯盆地南部二叠系山西组及下石盒子组盒8段沉积相[J].古地理学报,2007,9(4):370-377.
[6]赵虹,李文厚.鄂尔多斯盆地中东部上古生界三角洲沉积特征[J].天然气工业,2006,26(1):26-31.
[7]朱红涛.鄂尔多斯盆地东北部高分辨层序地层与沉积模式研究[D].武汉:中国地质大学,2005.
[8]朱红涛,陈开远,LIU Ke-yu,等.鄂尔多斯盆地东北部山西组河流相沉积证据[J].天然气工业,2007,27(12):68-73.
[9]ZHU Hong-tao,CHEN Kai-yuan,LIU Ke-yu.A se-quence stratigraphic model for reservoir sand-body distri-bution in the Lower Permian Shanxi Formation in the Or-dos Basin,northern China[J].Marine and PetroleumGeology,2008,2(5):731-743.
[10]REYNOLDS A D.Dimensions of paralic sandstone bodies[J].AAPG,1999,83(3):211-229.
[11]GALLOWAY W E,HOBDAY D K.Terrigenous ClasticDepostional Systems-Application to Petrolium,Coal,andUranium Exploration[M].New York:Springer-Verlag,1983.
[2]马强.延长油区上古生界物源及沉积相分析[D].西安:西北大学地质学系,2009.
[3]陈全红,李文厚,刘昊伟,等.鄂尔多斯盆地上石炭统—中二叠统砂岩物源分析[J].古地理学报,2009,11(6):629-641.
[4]庞军刚,李文厚,杨友运,等.鄂尔多斯盆地子洲地区上古生界沉积体系特征[J].天然气工业,2007,27(12):58-61.
[5]王超勇,陈孟晋,汪泽成,等.鄂尔多斯盆地南部二叠系山西组及下石盒子组盒8段沉积相[J].古地理学报,2007,9(4):370-377.
[6]赵虹,李文厚.鄂尔多斯盆地中东部上古生界三角洲沉积特征[J].天然气工业,2006,26(1):26-31.
[7]朱红涛.鄂尔多斯盆地东北部高分辨层序地层与沉积模式研究[D].武汉:中国地质大学,2005.
[8]朱红涛,陈开远,LIU Ke-yu,等.鄂尔多斯盆地东北部山西组河流相沉积证据[J].天然气工业,2007,27(12):68-73.
[9]ZHU Hong-tao,CHEN Kai-yuan,LIU Ke-yu.A se-quence stratigraphic model for reservoir sand-body distri-bution in the Lower Permian Shanxi Formation in the Or-dos Basin,northern China[J].Marine and PetroleumGeology,2008,2(5):731-743.
[10]REYNOLDS A D.Dimensions of paralic sandstone bodies[J].AAPG,1999,83(3):211-229.
[11]GALLOWAY W E,HOBDAY D K.Terrigenous ClasticDepostional Systems-Application to Petrolium,Coal,andUranium Exploration[M].New York:Springer-Verlag,1983.