西湖凹陷构造演化特征及油气运聚单元划分
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摘要
西湖凹陷是目前东海陆架盆地油气勘探的重点,但其油气运聚单元始终未进行系统的划分,限制了区域成藏研究及勘探目标的优选。本文从油气运移动力角度系统分析西湖凹陷油气富集分布规律及原因,以该凹陷大量生排烃期的构造活动演化为基础,恢复关键成藏时刻对应的构造特征与沉积,计算出柳浪组沉积末期流体势,明确了该时期流体势场的油气运聚特征。结果表现为由凹陷中心向斜坡逐渐降低的分布规律,在此基础上将西湖凹陷划分9个油气运聚单元。本文研究的运聚单元中Ⅰ、Ⅱ、Ⅲ、Ⅴ、Ⅵ是较好的油气聚集单元,具有利于油气长期运移聚集的条件,是未来西湖凹陷勘探的主要潜力区。
Xihu Sag is the focus of oil and gas exploration in the East China Sea Shelf Basin, but the hydrocarbon migration and accumulation units have not been systematically divided. This restricts the study of regional reservoir formation and the optimization of exploration targets. Distribution and cause of oil and gas accumulation are discussed in terms of the dynamics of oil and gas migration, based on the evolution of tectonic activity in the large number of hydrocarbon generation and expulsion stages of the Sag. The fluids' potential after the deposition of the Liulang Formation is calculated on the corresponding structural features and sedimentary research results. As a result, the characteristics of petroleum migration and accumulation during the period are recognized. This indicates that the fluid potential is of succession and consistency, characterized by its descending movement from the middle to the east and west. Accordingly, Xihu Sag can be divided into nine oil-gas migration and accumulation units. I, II, III, V and VI are better oil and gas accumulation units, and are advantageous to the long-term migration and accumulation of oil and gas. They are the main potential areas for future exploration in Xihu Sag.
Xihu Sag is the focus of oil and gas exploration in the East China Sea Shelf Basin, but the hydrocarbon migration and accumulation units have not been systematically divided. This restricts the study of regional reservoir formation and the optimization of exploration targets. Distribution and cause of oil and gas accumulation are discussed in terms of the dynamics of oil and gas migration, based on the evolution of tectonic activity in the large number of hydrocarbon generation and expulsion stages of the Sag. The fluids' potential after the deposition of the Liulang Formation is calculated on the corresponding structural features and sedimentary research results. As a result, the characteristics of petroleum migration and accumulation during the period are recognized. This indicates that the fluid potential is of succession and consistency, characterized by its descending movement from the middle to the east and west. Accordingly, Xihu Sag can be divided into nine oil-gas migration and accumulation units. I, II, III, V and VI are better oil and gas accumulation units, and are advantageous to the long-term migration and accumulation of oil and gas. They are the main potential areas for future exploration in Xihu Sag.
引文
[1]柳广弟,高先志.油气运聚单元分析:油气勘探评价的有效途径[J].地质科学,2003,38(3):307-314.Liu G D,Gao X Z.Analysis of petroleum migration and accumulation unit:an effective approach to assessment for petroleum exploration[J].Chinese Journal of Geology,2003,38(3):307-314.
[2]郭秋麟,米石云,胡素云,等.盆地模拟技术在油气资源评价中的作用[J].中国石油勘探,2006(3):50-55.Guo Q L,Mi S Y,Hu S Y,et al.Application of basin modeling technology in petroleum resource evaluation[J].China Petroleum Exploration,2006(3):50-55.
[3]胡明毅,柯岭,梁建投.西湖凹陷花港组沉积相特征及相模式[J].石油天然气学报,2010,32(5):1-5.Hu M Y,Ke L,Liang J T.The characteristics and pattern of sedimentary facies of Huagang formation in Xihu depression[J].Journal of Oil and Gas Technology,2010,32(5):1-5.
[4]张绍亮,秦兰芝,余逸凡,等.西湖凹陷渐新统花港组下段沉积相特征及模式[J].石油地质与工程,2014,28(2):5-8.Zhang S L,Qin L Z,Yu Y F,et al.Sedimentary facies characteristics and its mode of lower member of oligocene Huagang formation in Xihu sag[J].Petroleum Geology and Engineering,2014,28(2):5-8.
[5]周祥林,高伟中,张建培,等.东海西湖凹陷平北断裂特征及其对油气成藏的控制[J].上海国土资源,2014,35(2):54-57.Zhou X L,Gao W Z,Zhang J P,et al.Fractures in the Pingbei area and their control on hydrocarbon accumulation in the Xihu sag of the East China Sea[J].Shanghai Land&Resources,2014,35(2):54-57.
[6]连小翠,张建培.西湖凹陷反转构造样式与迁移规律[J].上海国土资源,2016,37(4):83-88.Lian X C,Zhang J P.Inversion structural styles and migration rules in the Xihu Sag[J].Shanghai Land&Resources,2016,37(4):83-88.
[7]连小翠.东海陆架盆地沉降中心迁移演化机制[J].上海国土资源,2018,39(1):93-98.Lian X C.Migration and evolution of subsidence centers in the East China Sea Shelf Basin[J].Shanghai Land&Resources,2018,39(1):93-98.
[8]陈忠云,鲁法伟,张建培,等.东海陆架西湖凹陷新生代沉积地层时代厘定[J].上海国土资源,2013,34(1):42-45.Chen Z Y,Lu F W,Zhang J P,et al.Age of cenozoic sedimentary formations of the Xihu sag,East China Sea continental shelf[J].Shanghai Land&Resources,2013,34(1):42-45.
[9]赵洪,蒋一鸣,常吟善,等.西湖凹陷平湖组基于沉积相标志的沉积特征研究[J].上海国土资源,2018,39(1):88-92.Zhao H,Jiang Y M,Chang Y S,et al.Study on sedimentary characteristics of the Pinghu Formation based on sedimentary facies markers in Xihu Sag,East China Sea Basin[J].Shanghai Land&Resources,2018,39(1):88-92.
[10]Hubbert M K.Entrapment of petroleum under hydrodynamic conditions[J].AAPG Bulletin,1954,37(8):1954-2026.
[11]王永春.伊通地堑含油气系统与油气成藏[M].北京:石油工业出版社,2001:1-213.Wang Y C.Petroleum system and petroleum entrapment of Yitong basin[M].Beijing:Petroleum Industry Press,2001:1-213.
[12]施和生.油气勘探“源-汇-聚”评价体系及其应用--以珠江口盆地珠一坳陷为例[J].中国海上油气,2015,27(5):1-12.Shi H S.“Source-migration-accumulation”evaluation system and its application in hydrocarbon exploration:a case study of Zhu Idepression in Pearl river mouth basin[J].China Offshore Oil and Gas,2015,27(5):1-12.
[13]宋小勇.东海盆地西湖凹陷构造样式及其对油气聚集的控制[D].北京:中国地质大学(北京),2007.Song X Y.Structural style in Xihu depression,the East China Sea basin and its control on the oil-gas accumulation[D].Beijing:China University of Geosciences(Beijing),2007.
[2]郭秋麟,米石云,胡素云,等.盆地模拟技术在油气资源评价中的作用[J].中国石油勘探,2006(3):50-55.Guo Q L,Mi S Y,Hu S Y,et al.Application of basin modeling technology in petroleum resource evaluation[J].China Petroleum Exploration,2006(3):50-55.
[3]胡明毅,柯岭,梁建投.西湖凹陷花港组沉积相特征及相模式[J].石油天然气学报,2010,32(5):1-5.Hu M Y,Ke L,Liang J T.The characteristics and pattern of sedimentary facies of Huagang formation in Xihu depression[J].Journal of Oil and Gas Technology,2010,32(5):1-5.
[4]张绍亮,秦兰芝,余逸凡,等.西湖凹陷渐新统花港组下段沉积相特征及模式[J].石油地质与工程,2014,28(2):5-8.Zhang S L,Qin L Z,Yu Y F,et al.Sedimentary facies characteristics and its mode of lower member of oligocene Huagang formation in Xihu sag[J].Petroleum Geology and Engineering,2014,28(2):5-8.
[5]周祥林,高伟中,张建培,等.东海西湖凹陷平北断裂特征及其对油气成藏的控制[J].上海国土资源,2014,35(2):54-57.Zhou X L,Gao W Z,Zhang J P,et al.Fractures in the Pingbei area and their control on hydrocarbon accumulation in the Xihu sag of the East China Sea[J].Shanghai Land&Resources,2014,35(2):54-57.
[6]连小翠,张建培.西湖凹陷反转构造样式与迁移规律[J].上海国土资源,2016,37(4):83-88.Lian X C,Zhang J P.Inversion structural styles and migration rules in the Xihu Sag[J].Shanghai Land&Resources,2016,37(4):83-88.
[7]连小翠.东海陆架盆地沉降中心迁移演化机制[J].上海国土资源,2018,39(1):93-98.Lian X C.Migration and evolution of subsidence centers in the East China Sea Shelf Basin[J].Shanghai Land&Resources,2018,39(1):93-98.
[8]陈忠云,鲁法伟,张建培,等.东海陆架西湖凹陷新生代沉积地层时代厘定[J].上海国土资源,2013,34(1):42-45.Chen Z Y,Lu F W,Zhang J P,et al.Age of cenozoic sedimentary formations of the Xihu sag,East China Sea continental shelf[J].Shanghai Land&Resources,2013,34(1):42-45.
[9]赵洪,蒋一鸣,常吟善,等.西湖凹陷平湖组基于沉积相标志的沉积特征研究[J].上海国土资源,2018,39(1):88-92.Zhao H,Jiang Y M,Chang Y S,et al.Study on sedimentary characteristics of the Pinghu Formation based on sedimentary facies markers in Xihu Sag,East China Sea Basin[J].Shanghai Land&Resources,2018,39(1):88-92.
[10]Hubbert M K.Entrapment of petroleum under hydrodynamic conditions[J].AAPG Bulletin,1954,37(8):1954-2026.
[11]王永春.伊通地堑含油气系统与油气成藏[M].北京:石油工业出版社,2001:1-213.Wang Y C.Petroleum system and petroleum entrapment of Yitong basin[M].Beijing:Petroleum Industry Press,2001:1-213.
[12]施和生.油气勘探“源-汇-聚”评价体系及其应用--以珠江口盆地珠一坳陷为例[J].中国海上油气,2015,27(5):1-12.Shi H S.“Source-migration-accumulation”evaluation system and its application in hydrocarbon exploration:a case study of Zhu Idepression in Pearl river mouth basin[J].China Offshore Oil and Gas,2015,27(5):1-12.
[13]宋小勇.东海盆地西湖凹陷构造样式及其对油气聚集的控制[D].北京:中国地质大学(北京),2007.Song X Y.Structural style in Xihu depression,the East China Sea basin and its control on the oil-gas accumulation[D].Beijing:China University of Geosciences(Beijing),2007.
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