南沙海域大中型油气田分布与油气地质特征
|
摘要
在广泛调研国内外相关资料的基础上,收集IHS、C&C、USGS数据库最新的钻井、油气田资料,系统分析了南沙海域大中型油气田及其成藏要素的分布与油气地质特征。南沙海域已发现大中型油气田主要分布在文莱—沙巴盆地和曾母盆地,无论是油气田数量还是油气储量规模均集中于中新世地层。主要发育裂谷(漂移)期海陆交互相煤系烃源岩、后裂谷期前三角洲泥岩两期烃源岩。主要沉积盆地具有海相生气为主、海陆过渡相和湖相生油为主的烃源岩分布特征,这也是"深水区富气、浅水区富油"这一油气分布规律的物质基础。储集层受区域构造演化和沉积环境控制,具有分带特征,表现为"外带老(上渐新统—下中新统)、内带新(中、上中新统)"。大中型油气田分布具有"外带以砂岩油气藏为主、内带以碳酸盐岩气藏为主"的特点。
Based on the extensive survey of relevant researches at home and abroad, and the latest drilling, oil&gas fields information from IHS, C&C, USGS database, the authors systemically analyzed the distribution and hydrocarbon geological characteristics of large and medium fields in Nansha sea area. Large and medium oil and gas fields discovered mainly in Brunei-Sabah and Zengmu Basins in Nansha sea area. Both the number of oil and gas fields and the size of hydrocarbon reserves are concentrated in the Miocene. There are mainly two types of source rocks, i.e. coal measures developed in the marine-terrestrial facies of rifting(drifting)period and the mudstones of prodelta facies in post-rifting period. The distribution of source rocks in the main sedimentary basins are characterized by the fact that the source rocks of marine facies are gas prone and those of the transitional and lacustrine facies are oil prone, which constitutes the material base of "deep water area rich in gas, shallow water area rich in oil". Controlled by the regional tectonic evolution and sedimentary environment, the distribution of reservoir rocks reveals the characteristics of"older reservoir(upper Oligocene to mid-lower Miocene) in the outside belt, younger(mid-upper Miocene) in the inside belt". The distribution of large and medium oil and gas fields also exhibits the regularity of "sandstone oil and gas reservoir in the outside belt, carbonate gas reservoir in the inside belt".
Based on the extensive survey of relevant researches at home and abroad, and the latest drilling, oil&gas fields information from IHS, C&C, USGS database, the authors systemically analyzed the distribution and hydrocarbon geological characteristics of large and medium fields in Nansha sea area. Large and medium oil and gas fields discovered mainly in Brunei-Sabah and Zengmu Basins in Nansha sea area. Both the number of oil and gas fields and the size of hydrocarbon reserves are concentrated in the Miocene. There are mainly two types of source rocks, i.e. coal measures developed in the marine-terrestrial facies of rifting(drifting)period and the mudstones of prodelta facies in post-rifting period. The distribution of source rocks in the main sedimentary basins are characterized by the fact that the source rocks of marine facies are gas prone and those of the transitional and lacustrine facies are oil prone, which constitutes the material base of "deep water area rich in gas, shallow water area rich in oil". Controlled by the regional tectonic evolution and sedimentary environment, the distribution of reservoir rocks reveals the characteristics of"older reservoir(upper Oligocene to mid-lower Miocene) in the outside belt, younger(mid-upper Miocene) in the inside belt". The distribution of large and medium oil and gas fields also exhibits the regularity of "sandstone oil and gas reservoir in the outside belt, carbonate gas reservoir in the inside belt".
引文
[1]姚伯初,刘振湖.南沙海域沉积盆地及油气资源分布[J].中国海上油气,2006.18(3):150-160.
[2]刘振湖.南沙海域沉积盆地与油气地质条件[J].大地构造与成矿学,2005.15(3):35-45.
[3]仝志刚,胡根成,贺清.南沙西部海区构造沉降与古热流[J].大地构造与成矿学,2005,29(3):371-376.
[4]刘宝明,夏斌,刘振湖,等.南海西南部海区油气富集成藏类型分析[J].石油实验地质,2002,24(4):322-326,333.
[5]Todd S P,Dunn M E,Barwise A J G.1997.Characterizing petroleum charge systems in the Tertiary of SE Asia.In FraserA J,Matthews S J,Murphy R W,eds.,Petroleum geology of Southeast Asia.Geological Society Special Publication,126:25-47.
[6]王登,徐耀辉,文志冈,等.曾母盆地东巴林坚坳陷烃源岩评价及油源探讨[J].矿物岩石地球化学通报,2013.32(5):583-590.
[7]王登,徐耀辉,文志刚,等.曾母盆地中部地区天然气与凝析油地球化学特征及成因[J].天然气地球科学,2013.24(6):1205-1213.
[8]张厚和,赫拴柱,刘鹏,等.曾母盆地烃源岩评价及油源探讨[J].矿物岩石地球化学通报,2017,Vol.36 No.3,May.
[9]Nguyen Du Hung,Hung Van Le.2003.Hydrocarbon Geology of Cuu Long Basin-Offshore Vietnam.AAPG Search and Discovery Article#90017,AAPG International Conference,Barcelona,Spain,September 21-24.
[10]Mat-Zin I C,Tucker M E.1999.An alternative stratigraphic scheme for the Sarawak Basin.Journal of Asian Earth Sciences,17:215-232.
[11]马良涛,王春修,牛嘉玉,等.西北沙巴盆地油气地质特征及油气成藏控制因素[J].海洋地质前沿,2012,28(7):36-43.
[12]贺清,仝志刚,胡根成.万安盆地沉积物充填演化及其对油气藏形成的作用[J].中国海上油气,2005.(02):80-83+88.
[13]梁金强,杨木壮,张光学,等.南海万安盆地中部油气成藏特征[J].南海地质研究,2003(1):27-34.
[14]刘伯土,陈长胜.南沙海域万安盆地新生界含油气系统分析[J].石油实验地质,2002,24(2):110-114.
[15]邱燕,陈国能,解习农,等.南海西南海域曾母盆地新生界沉积充填演化研究[J].热带海洋学报,2005,24(5):43-52.
[2]刘振湖.南沙海域沉积盆地与油气地质条件[J].大地构造与成矿学,2005.15(3):35-45.
[3]仝志刚,胡根成,贺清.南沙西部海区构造沉降与古热流[J].大地构造与成矿学,2005,29(3):371-376.
[4]刘宝明,夏斌,刘振湖,等.南海西南部海区油气富集成藏类型分析[J].石油实验地质,2002,24(4):322-326,333.
[5]Todd S P,Dunn M E,Barwise A J G.1997.Characterizing petroleum charge systems in the Tertiary of SE Asia.In FraserA J,Matthews S J,Murphy R W,eds.,Petroleum geology of Southeast Asia.Geological Society Special Publication,126:25-47.
[6]王登,徐耀辉,文志冈,等.曾母盆地东巴林坚坳陷烃源岩评价及油源探讨[J].矿物岩石地球化学通报,2013.32(5):583-590.
[7]王登,徐耀辉,文志刚,等.曾母盆地中部地区天然气与凝析油地球化学特征及成因[J].天然气地球科学,2013.24(6):1205-1213.
[8]张厚和,赫拴柱,刘鹏,等.曾母盆地烃源岩评价及油源探讨[J].矿物岩石地球化学通报,2017,Vol.36 No.3,May.
[9]Nguyen Du Hung,Hung Van Le.2003.Hydrocarbon Geology of Cuu Long Basin-Offshore Vietnam.AAPG Search and Discovery Article#90017,AAPG International Conference,Barcelona,Spain,September 21-24.
[10]Mat-Zin I C,Tucker M E.1999.An alternative stratigraphic scheme for the Sarawak Basin.Journal of Asian Earth Sciences,17:215-232.
[11]马良涛,王春修,牛嘉玉,等.西北沙巴盆地油气地质特征及油气成藏控制因素[J].海洋地质前沿,2012,28(7):36-43.
[12]贺清,仝志刚,胡根成.万安盆地沉积物充填演化及其对油气藏形成的作用[J].中国海上油气,2005.(02):80-83+88.
[13]梁金强,杨木壮,张光学,等.南海万安盆地中部油气成藏特征[J].南海地质研究,2003(1):27-34.
[14]刘伯土,陈长胜.南沙海域万安盆地新生界含油气系统分析[J].石油实验地质,2002,24(2):110-114.
[15]邱燕,陈国能,解习农,等.南海西南海域曾母盆地新生界沉积充填演化研究[J].热带海洋学报,2005,24(5):43-52.