乌什凹陷及东部邻区白垩系层序划分与沉积古地理
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摘要
对乌什凹陷乌参1井的白垩系进行了层序划分,分为5个三级层序,其中亚格列木组只有低位体系域,与其上舒善河组合在一起可分为两个三级层序;巴西盖组分为两个三级层序;巴什基奇克组沉积后受到剥蚀而只剩一个三级层序。亚格列木组的沉积相为冲积扇相和辫状河相。舒善河组由辫状河、湖泊三角洲和湖泊沉积组成,岩性为中至粗粒砂岩和泥质岩。巴西盖组沉积相组合包括辫状河三角洲相、扇三角洲、湖泊三角洲和湖泊相并夹有滨浅湖相。巴什基奇克组由低位体系域的冲积扇相、扇三角洲相和湖进体系域的浅湖沉积组成。地震反射特征指示乌什凹陷白垩系沉积具有南北双向物源的特征。北部物源为南天山褶皱带,南部物源为温宿凸起。砂岩碎屑成分分析表明乌什凹陷与东部邻区白垩系存在三个较为明显的物源区,即(1)天山南侧的再循环造山带,(2)温宿凸起再循环造山带快速抬升区,(3)塔北隆起或东、东南方向的大陆蚀源区。它们控制了白垩系沉积相带在研究区的展布。绘制的乌什凹陷及东部邻区白垩系巴什基奇克组沉积古地理图对今后在该区的油气勘探有参考意义。乌参1井白垩系储集岩分布于舒善河组、巴西盖组和巴什基奇克组低位和高位体系域,储集岩类型以含砾粗砂岩、含砾中砂岩和中砂岩为主,它们与其上的湖相泥岩组成三套储盖组合。乌什凹陷白垩系具有良好的油气勘探前景。
The Cretaceous sequence of well Wucan No.1 in Wushi Depression is divided into five 3rd-order sequences.The Yageliemu Fm.has only the lower system tract.The Yageliemu Fm.and Shushanhe Fm.together can be divided into two 3rd-order sequences,and the Baxigai Fm.divided into two 3rd-order sequences.The Bashijiqike Fm.has only one 3rd-order sequence left.The Yageliemu Fm.has!the facies of alluvial fans and braided rivers.The Shushanhe Fm.has the facies composed of braided rivers,lake deltas and lake muddy deposits,with the lithology from coarse-middle sandstones to argillaceous rocks.The Bashijiqike Fm.has the facies of braided river deltas,fan deltas,lake deltas and lake,interbedded with coastal lake facies.The Bashijiqike Fm.has the lower system tract composed of alluvial fan,fan delta facies,and the transgressive system tract of shallow lake facies.The seismic reflections show that the Cretaceous deposits in Wushi Depression came from two directions,the Tianshan mountain on the north and Wensu uplift on the south.The clastic composition analyses of sandstones indicate that there are three provenances:1) the recycling orogenic belts on the southern Tianshan;2) the rapid uplifting area of the recycling orogenic belts in the Wensu uplift;3) the continent erosion areas in the Tabei uplift or in somewhere to the east or southeast of the studied area,existing in the Cretaceous.They controlled the distribution of sedimentary facies belts in the studied areas in the Cretaceous.The depositional palaeogeographic map of Bashijiqike Fm.in the Cretaceous may serve as a reference for oil and gas exploration in the Wushi Depression and its adjacent areas in the east.The reservoirs of Wucan well 1 are developed in the lower or higher system tracts of Shushanhe Fm.,Baxigai Fm.and Bashijiqike Fm.in the Cretaceous,and have the rocks of pebbled coarse sandstones,pebbled medium sandstones and medium sandstones,which make three sets of reservoir-cap assemblages with the lake mudstones above them.There are prospects of finding oil and gas in the Cretaceous in the Wushi Depression.
The Cretaceous sequence of well Wucan No.1 in Wushi Depression is divided into five 3rd-order sequences.The Yageliemu Fm.has only the lower system tract.The Yageliemu Fm.and Shushanhe Fm.together can be divided into two 3rd-order sequences,and the Baxigai Fm.divided into two 3rd-order sequences.The Bashijiqike Fm.has only one 3rd-order sequence left.The Yageliemu Fm.has!the facies of alluvial fans and braided rivers.The Shushanhe Fm.has the facies composed of braided rivers,lake deltas and lake muddy deposits,with the lithology from coarse-middle sandstones to argillaceous rocks.The Bashijiqike Fm.has the facies of braided river deltas,fan deltas,lake deltas and lake,interbedded with coastal lake facies.The Bashijiqike Fm.has the lower system tract composed of alluvial fan,fan delta facies,and the transgressive system tract of shallow lake facies.The seismic reflections show that the Cretaceous deposits in Wushi Depression came from two directions,the Tianshan mountain on the north and Wensu uplift on the south.The clastic composition analyses of sandstones indicate that there are three provenances:1) the recycling orogenic belts on the southern Tianshan;2) the rapid uplifting area of the recycling orogenic belts in the Wensu uplift;3) the continent erosion areas in the Tabei uplift or in somewhere to the east or southeast of the studied area,existing in the Cretaceous.They controlled the distribution of sedimentary facies belts in the studied areas in the Cretaceous.The depositional palaeogeographic map of Bashijiqike Fm.in the Cretaceous may serve as a reference for oil and gas exploration in the Wushi Depression and its adjacent areas in the east.The reservoirs of Wucan well 1 are developed in the lower or higher system tracts of Shushanhe Fm.,Baxigai Fm.and Bashijiqike Fm.in the Cretaceous,and have the rocks of pebbled coarse sandstones,pebbled medium sandstones and medium sandstones,which make three sets of reservoir-cap assemblages with the lake mudstones above them.There are prospects of finding oil and gas in the Cretaceous in the Wushi Depression.
引文
[1]Miao J J,Jia C Z,Dai J X,et al.Structural analysis and hy-drocarbon formation history of Wushi-Wensu Area in the Mid-South Tianshan Foreland Thrust belt[J].Natural Gas Geoscience,2005,16(4):428-432(in Chinese).
[2]Jia J H,Zhou D Y,Zhang L P,et al.Petroleum geologiccharacteristics of Wushi Sagin Tari mbasin[J].Acta Petrolei Sinica,2004,25(6):12-17(in Chinese).
[3]Zhang Z H,LX X,Yang M H,et al.Petrogeologic feature of Wushi Sagin Tari mbasin[J].Journal of Xi an Shiyou U-niversity:Natural Science Edition,2004,19(4):29-31,65-66(in Chinese).
[4]Zhou X X,Jia J H,Zhou D Y,et al.Gas pool forming process in Wushi Sag of Kuqa Depression,Tari m Basin[J].Petroleum Exploration and Development,2006,l33(2):184-188(in Chinese).
[5]Wu S M,Chen HZ.The status and development in sedi men-tary provenance analysis[J].Ocean Science,1999,2:35-37(in Chinese).
[6]Zhao HG,Liu C Y.Approaches and prospects of provenance analysis[J].Acta Sedi mentologica Sinica,2003,21(3):409-415(in Chinese).
[7]Wang Z J,Chen H D,Zhang J Q.Researches and prospects of provenance analysis[J].Sedi mentary Geology and Tethyan Geology,2000,20(4):104-110(in Chinese).
[8]Dickinson W R.Interpreting provenance relations from de-trital modes of sandstones[M]∥Zuffa G G.Provenance of Arenites.Dordrecht:D.Reidel,NATO-ASI Series1985,148:333-361.
[9]Xiao J X,Lin C S,Liu J Y.Depositional palaeogeography of Cretaceous of Kuqa depression in Northern Tari m basin[J].Geoscience,2005,19(2):253-260(in Chinese).
[10]Xiao J X,Lin C S,Liu J Y.Characteristics of Cretaceous se-quence stratigraphy and system tract in Kuche dpression,Northern Tari m basin[J].Acta Geoscientia Sinica,2002,23(5):453-458(in Chinese).
[11]Goodwin N S,Mann A L,Patience R L.Structure and sig-nificance of C304-methyl steranes in lacustrine shales and oil[J].Org Geochem,1988,12:495-506.
[12]Peters K E,Moldowan J M.The biomarkers guide interpre-ting moleculer fossils in petroleum and ancient sedi ments[M].NewJersy:Prentice-Hall,1993:192-198.
[13]Hou DJ,Wang T G.Dinosteranes in terrestrial deposits and crude oils[J].Chinese Science Bulletin,1995,40(4):333-335(in Chinese).
[1]苗继军,贾承造,戴金星,等.南天山前陆冲断带中段乌什—温宿地区构造分析与油气成藏[J].天然气地球科学,2005,16(4):428-432.
[2]贾进华,周东延,张立平,等.塔里木盆地乌什凹陷石油地质特征[J].石油学报,2004,25(6):12-17.
[3]张振红,吕修祥,杨明慧,等.塔里木盆地乌什凹陷石油地质特征[J].西安石油大学学报:自然科学版,2004,19(4):29-31,65-66.
[4]周兴熙,贾进华,周东延,等.库车坳陷乌什凹陷东部成藏作用初步研究[J].石油勘探与开发,2006,l33(2):184-188.
[5]吴世敏,陈汉宗.沉积物物源分析的现状[J].海洋科学,1999,2:35-37.
[6]赵红格,刘池洋.物源分析方法及研究进展[J].沉积学报,2003,21(3):409-415.
[7]汪正江,陈洪德,张锦泉.物源分析的研究与展望[J].沉积与特提斯地质,2000,20(4):104-110.
[9]肖建新,林畅松,刘景颜.塔里木盆地北部库车坳陷白垩系沉积古地理[J].现代地质,2005,19(2):253-260.
[10]肖建新,林畅松,刘景颜.塔里木盆地北部库车坳陷白垩系层序地层与体系域特征[J].地球学报,2002,23(5):453-458.
[13]侯读杰,王铁冠.陆相湖盆沉积物和原油中的甲藻甾烷[J].科学通报,1995,40(4):333-335.
[2]Jia J H,Zhou D Y,Zhang L P,et al.Petroleum geologiccharacteristics of Wushi Sagin Tari mbasin[J].Acta Petrolei Sinica,2004,25(6):12-17(in Chinese).
[3]Zhang Z H,LX X,Yang M H,et al.Petrogeologic feature of Wushi Sagin Tari mbasin[J].Journal of Xi an Shiyou U-niversity:Natural Science Edition,2004,19(4):29-31,65-66(in Chinese).
[4]Zhou X X,Jia J H,Zhou D Y,et al.Gas pool forming process in Wushi Sag of Kuqa Depression,Tari m Basin[J].Petroleum Exploration and Development,2006,l33(2):184-188(in Chinese).
[5]Wu S M,Chen HZ.The status and development in sedi men-tary provenance analysis[J].Ocean Science,1999,2:35-37(in Chinese).
[6]Zhao HG,Liu C Y.Approaches and prospects of provenance analysis[J].Acta Sedi mentologica Sinica,2003,21(3):409-415(in Chinese).
[7]Wang Z J,Chen H D,Zhang J Q.Researches and prospects of provenance analysis[J].Sedi mentary Geology and Tethyan Geology,2000,20(4):104-110(in Chinese).
[8]Dickinson W R.Interpreting provenance relations from de-trital modes of sandstones[M]∥Zuffa G G.Provenance of Arenites.Dordrecht:D.Reidel,NATO-ASI Series1985,148:333-361.
[9]Xiao J X,Lin C S,Liu J Y.Depositional palaeogeography of Cretaceous of Kuqa depression in Northern Tari m basin[J].Geoscience,2005,19(2):253-260(in Chinese).
[10]Xiao J X,Lin C S,Liu J Y.Characteristics of Cretaceous se-quence stratigraphy and system tract in Kuche dpression,Northern Tari m basin[J].Acta Geoscientia Sinica,2002,23(5):453-458(in Chinese).
[11]Goodwin N S,Mann A L,Patience R L.Structure and sig-nificance of C304-methyl steranes in lacustrine shales and oil[J].Org Geochem,1988,12:495-506.
[12]Peters K E,Moldowan J M.The biomarkers guide interpre-ting moleculer fossils in petroleum and ancient sedi ments[M].NewJersy:Prentice-Hall,1993:192-198.
[13]Hou DJ,Wang T G.Dinosteranes in terrestrial deposits and crude oils[J].Chinese Science Bulletin,1995,40(4):333-335(in Chinese).
[1]苗继军,贾承造,戴金星,等.南天山前陆冲断带中段乌什—温宿地区构造分析与油气成藏[J].天然气地球科学,2005,16(4):428-432.
[2]贾进华,周东延,张立平,等.塔里木盆地乌什凹陷石油地质特征[J].石油学报,2004,25(6):12-17.
[3]张振红,吕修祥,杨明慧,等.塔里木盆地乌什凹陷石油地质特征[J].西安石油大学学报:自然科学版,2004,19(4):29-31,65-66.
[4]周兴熙,贾进华,周东延,等.库车坳陷乌什凹陷东部成藏作用初步研究[J].石油勘探与开发,2006,l33(2):184-188.
[5]吴世敏,陈汉宗.沉积物物源分析的现状[J].海洋科学,1999,2:35-37.
[6]赵红格,刘池洋.物源分析方法及研究进展[J].沉积学报,2003,21(3):409-415.
[7]汪正江,陈洪德,张锦泉.物源分析的研究与展望[J].沉积与特提斯地质,2000,20(4):104-110.
[9]肖建新,林畅松,刘景颜.塔里木盆地北部库车坳陷白垩系沉积古地理[J].现代地质,2005,19(2):253-260.
[10]肖建新,林畅松,刘景颜.塔里木盆地北部库车坳陷白垩系层序地层与体系域特征[J].地球学报,2002,23(5):453-458.
[13]侯读杰,王铁冠.陆相湖盆沉积物和原油中的甲藻甾烷[J].科学通报,1995,40(4):333-335.
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