三湖坳陷第四系七个泉组层序地层及有利目标预测
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摘要
采用钻/测井、地震及米兰科维奇旋回相结合的方法,对柴达木盆地三湖坳陷第四系七个泉组进行了高分辨率层序地层学研究,在七个泉组可识别出6个层序界面,进而划分出5个三级层序。根据蒿藜花粉含量、碳酸盐含量、δ18O、GR、氯离子含量等对比分析,本区气候总体上由温暖变为干冷,存在5次温湿与干冷气候的次级旋回,分别对应sq1、sq2、sq3、sq4、sq5五个层序,每个旋回内部波动与基准面上升半旋回和基准面下降半旋回相一致。层序Ⅱ(sq2)基准面上升半旋回时期发育的三角洲前缘砂体尖灭及砂岩透镜体圈闭是进一步勘探的有利目标。
By combining drilling,logging and seismic data with the Milankovitch cycle,we have carried out a high-resolution sequence stratigraphy research on the Sanhu depression Seven Spring Group in the Qaidam Basin.We identified six sequence surfaces in the Seven Spring Group,and further divided the Group into five triple-pole sequences.Based on the comparative analysis of the contents of the Artemisiaepollenites pollen and carbonates,δ18O composition,the GR(Gamma Ray) curves,and the contents of chlorine ions,we could draw the following conclusions.Overall,the climate in this area has changed from warm to cold.There are five secondary cycles of this climate change,from warm and humid to cold and dry.These five cycles correspond to the five stratigraphic sequences of the sq1,sq2,sq3,sq4 and sq5.In each cycle,the inner fluctuations are coincident with the rise of the base level in upper half cycles and the fall of the base level in lower half cycles.The delta-front sandstone out-pinch and the sandstone lens traps developed during the upper half cycles of the rise of the base level of Sequence(sq2) are prospective targets for the further exploration for hydrocarbons.
By combining drilling,logging and seismic data with the Milankovitch cycle,we have carried out a high-resolution sequence stratigraphy research on the Sanhu depression Seven Spring Group in the Qaidam Basin.We identified six sequence surfaces in the Seven Spring Group,and further divided the Group into five triple-pole sequences.Based on the comparative analysis of the contents of the Artemisiaepollenites pollen and carbonates,δ18O composition,the GR(Gamma Ray) curves,and the contents of chlorine ions,we could draw the following conclusions.Overall,the climate in this area has changed from warm to cold.There are five secondary cycles of this climate change,from warm and humid to cold and dry.These five cycles correspond to the five stratigraphic sequences of the sq1,sq2,sq3,sq4 and sq5.In each cycle,the inner fluctuations are coincident with the rise of the base level in upper half cycles and the fall of the base level in lower half cycles.The delta-front sandstone out-pinch and the sandstone lens traps developed during the upper half cycles of the rise of the base level of Sequence(sq2) are prospective targets for the further exploration for hydrocarbons.
引文
[1]Wei G Q,Liu D L,Zhang Y,et al.Formation mechanism,distribution feature and exploration prospect of the Quaterna-ry biogenic gas in Qaidam Basin,NW China[J].Petroleum Exploration and Development,2005,32(4):84-89(in Chi-nese).
[2]Dang Y Q,Hou Z S,Xu Z Y,et al.The conditions for biogas accumulation in QaidamBasin[J].Xinjiang Petroleum Geolo-gy,2003,24(5):374-378(in Chinese).
[3]Zhu X M,Kang A,Hu Z Q,et al.Quaternary sequence stratigraphy and hydrocarbon evaluationin Qaidambasin[J].Petroleum Exploration and Development,2002,29(1):56-60(in Chinese).
[4]Dang Y Q,Zhang D W,Xu Z Y,et al.Sedi mentaryfacies and biogenic gas pool of the Quaternary of Sanhu area in Qaidam Basin[J].Journal of Palaeogeography,2004,6(1):110-118(in Chinese).
[5]Van Wagoner J C,Mittchum R M,Campion K M,et al.Si-liciclastic sequence stratigraphy in well logs,cores and out-crops;concepts for high-resolution correlation of ti me and fa-cies[J].AAPG,Methodsin Exploration Series,1990(7):55.
[6]Vail P R,Audemard F,Bowman S A,et al.The strati-graphic signatures of tectonics,eustasy and sedi mentology-an overview[M]∥Einsele G,Ricken W,Seilacher A.Cycles and events in stratigraphy.Berlin:Springer-Verlag,1991:617-659.
[7]Brown L F,Benson J M,Brink GJ,et al.Sequence stratig-raphyin offshore South African divergent basins—an atlas on exploration for Cretaceous lowstand traps[M].AAPG Stud-ies in Geology#41.Tulsa,Oklahoma,U.S.A:AAPG,1995:1-182.
[8]Deng H W,Wang H L,Zhu YJ,et al.High-resolution se-quence stratigraphy—theory and application[M].Beijing:Ge-ological Publishing House,2002(in Chinese).
[9]Qiu G Q,Liu J E,Shuai P,et al.Basic principle of Milanko-vitch cycle andits prospect in terrigenous lake basin analysis[J].Petroleum Geology and Recovery Efficiency,2001,8(5):5-9(in Chinese).
[10]Guo S B.Study onthe sequence stratigraphy and sedi mentary characteristics of Dongying groupin Taoyuan-Dapingfang area in the east of Liaohe depression[J].Geoscience,2006,20(3):473-479(in Chinese).
[11]Hu S Q,Chen G N,Wang Y M,et al.Fischer diagramand its computer si mulation of sedi mentary response—a case stud-y on the upper member of Eh3in Biyang fault depression[J].Oil&Gas Geology,1999,20(1):70-75(in Chinese).
[12]Yang F,Sun Z C,Ma Z Q,et al.Quaternary ostracode zones and magnetostratigraphic profile in the Qaidam basin[J].Acta Micropalacontologica Sinica,1997,14(4):378-390(in Chinese).
[1]魏国齐,刘德来,张英,等.柴达木盆地第四系生物气形成机理、分布规律与勘探前景[J].石油勘探与开发,2005,32(4):84-89.
[2]党玉琪,侯泽生,徐子远,等.柴达木盆地生物气成藏条件[J].新疆石油地质,2003,24(5):374-378.
[3]朱筱敏,康安,胡宗全,等.柴达木盆地第四系层序地层特征与油气评价[J].石油勘探与开发,2002,29(1):56-60.
[4]党玉琪,张道伟,徐子远,等.柴达木盆地三湖地区第四系沉积相与生物气成藏[J].古地理学报,2004,6(1):110-118.
[8]邓宏文,王红亮,祝永军,等.高分辨率层序学——原理及应用[M].北京:地质出版社,2002.
[9]邱桂强,刘军锷,帅萍,等.米氏旋回基本原理及其在陆相湖盆分析中的应用前景[J].油气地质与采收率,2001,8(5):5-9.
[10]郭少斌.辽河凹陷东部桃园—大平房地区东营组层序地层及沉积特征[J].现代地质,2006,20(3):473-479.
[11]胡受权,陈国能,王英民,等.Fischer图解及其沉积响应的计算机模拟——以泌阳断陷下第三系核三上段为例[J].石油与天然气地质,1999,20(1):70-75.
[12]杨藩,孙镇城,马志强,等.柴达木盆地第四系介形类化石带与磁性柱[J].微体古生物学报,1997,14(4):378-390.
[2]Dang Y Q,Hou Z S,Xu Z Y,et al.The conditions for biogas accumulation in QaidamBasin[J].Xinjiang Petroleum Geolo-gy,2003,24(5):374-378(in Chinese).
[3]Zhu X M,Kang A,Hu Z Q,et al.Quaternary sequence stratigraphy and hydrocarbon evaluationin Qaidambasin[J].Petroleum Exploration and Development,2002,29(1):56-60(in Chinese).
[4]Dang Y Q,Zhang D W,Xu Z Y,et al.Sedi mentaryfacies and biogenic gas pool of the Quaternary of Sanhu area in Qaidam Basin[J].Journal of Palaeogeography,2004,6(1):110-118(in Chinese).
[5]Van Wagoner J C,Mittchum R M,Campion K M,et al.Si-liciclastic sequence stratigraphy in well logs,cores and out-crops;concepts for high-resolution correlation of ti me and fa-cies[J].AAPG,Methodsin Exploration Series,1990(7):55.
[6]Vail P R,Audemard F,Bowman S A,et al.The strati-graphic signatures of tectonics,eustasy and sedi mentology-an overview[M]∥Einsele G,Ricken W,Seilacher A.Cycles and events in stratigraphy.Berlin:Springer-Verlag,1991:617-659.
[7]Brown L F,Benson J M,Brink GJ,et al.Sequence stratig-raphyin offshore South African divergent basins—an atlas on exploration for Cretaceous lowstand traps[M].AAPG Stud-ies in Geology#41.Tulsa,Oklahoma,U.S.A:AAPG,1995:1-182.
[8]Deng H W,Wang H L,Zhu YJ,et al.High-resolution se-quence stratigraphy—theory and application[M].Beijing:Ge-ological Publishing House,2002(in Chinese).
[9]Qiu G Q,Liu J E,Shuai P,et al.Basic principle of Milanko-vitch cycle andits prospect in terrigenous lake basin analysis[J].Petroleum Geology and Recovery Efficiency,2001,8(5):5-9(in Chinese).
[10]Guo S B.Study onthe sequence stratigraphy and sedi mentary characteristics of Dongying groupin Taoyuan-Dapingfang area in the east of Liaohe depression[J].Geoscience,2006,20(3):473-479(in Chinese).
[11]Hu S Q,Chen G N,Wang Y M,et al.Fischer diagramand its computer si mulation of sedi mentary response—a case stud-y on the upper member of Eh3in Biyang fault depression[J].Oil&Gas Geology,1999,20(1):70-75(in Chinese).
[12]Yang F,Sun Z C,Ma Z Q,et al.Quaternary ostracode zones and magnetostratigraphic profile in the Qaidam basin[J].Acta Micropalacontologica Sinica,1997,14(4):378-390(in Chinese).
[1]魏国齐,刘德来,张英,等.柴达木盆地第四系生物气形成机理、分布规律与勘探前景[J].石油勘探与开发,2005,32(4):84-89.
[2]党玉琪,侯泽生,徐子远,等.柴达木盆地生物气成藏条件[J].新疆石油地质,2003,24(5):374-378.
[3]朱筱敏,康安,胡宗全,等.柴达木盆地第四系层序地层特征与油气评价[J].石油勘探与开发,2002,29(1):56-60.
[4]党玉琪,张道伟,徐子远,等.柴达木盆地三湖地区第四系沉积相与生物气成藏[J].古地理学报,2004,6(1):110-118.
[8]邓宏文,王红亮,祝永军,等.高分辨率层序学——原理及应用[M].北京:地质出版社,2002.
[9]邱桂强,刘军锷,帅萍,等.米氏旋回基本原理及其在陆相湖盆分析中的应用前景[J].油气地质与采收率,2001,8(5):5-9.
[10]郭少斌.辽河凹陷东部桃园—大平房地区东营组层序地层及沉积特征[J].现代地质,2006,20(3):473-479.
[11]胡受权,陈国能,王英民,等.Fischer图解及其沉积响应的计算机模拟——以泌阳断陷下第三系核三上段为例[J].石油与天然气地质,1999,20(1):70-75.
[12]杨藩,孙镇城,马志强,等.柴达木盆地第四系介形类化石带与磁性柱[J].微体古生物学报,1997,14(4):378-390.