东海陆架盆地南部中生界分布特征与油气勘探前景
摘要
在充分利用前人对东海陆架盆地中生代油气勘探成果的基础上,对最新处理的地震剖面和重磁反演剖面进行了精细解释和综合研究,结合海陆中生界对比结果认为:东海陆架盆地南部中生界分布广、厚度大,平均厚度可达6 000m,而且具有"东厚西薄、南厚北薄"的特征。侏罗系主要分布在闽江和基隆凹陷,厚度分布稳定,w(TOC)平均值>1.0%;而白垩系在整个陆架盆地南部均有分布,具有向基隆凹陷加厚的趋势,w(TOC)平均值<1.0%。东海陆架盆地南部的基隆凹陷是下一步油气资源战略选区的首选目标,而台北低凸起很可能具有良好的油气远景。
In order to understand deeply the distribution of Mesozoic strata in the southern of East China Sea shelf basin,the processed seismic profiles newly have been interpreted.Combined with the gravity and magnet inversion and the Mesozoic strata correlations between the onshore and offshore,we think that the Mesozoic strata are characterized by extensive distribution and large thickness of over 6 000 m,and 'thick in the east and thin in the west' and 'thick in the south and thin in the north'.The Jurassic strata mainly deposited in Minjiang sag and Jilong sag,which have extensive distribution,stable thickness and high total content of organic carbon for the Mesozoic strata.The Cretaceous strata almost cover the whole southern of East China Sea shelf basin,which show a increasing trend in thickness toward the Jilong sag and low total content of organic carbon.It is inferred that the Jilong sag could be a target with good hydrocarbon potential for Jurassic strata,while Taibei low uplift could also be a hydrocarbon prospecting area.
In order to understand deeply the distribution of Mesozoic strata in the southern of East China Sea shelf basin,the processed seismic profiles newly have been interpreted.Combined with the gravity and magnet inversion and the Mesozoic strata correlations between the onshore and offshore,we think that the Mesozoic strata are characterized by extensive distribution and large thickness of over 6 000 m,and 'thick in the east and thin in the west' and 'thick in the south and thin in the north'.The Jurassic strata mainly deposited in Minjiang sag and Jilong sag,which have extensive distribution,stable thickness and high total content of organic carbon for the Mesozoic strata.The Cretaceous strata almost cover the whole southern of East China Sea shelf basin,which show a increasing trend in thickness toward the Jilong sag and low total content of organic carbon.It is inferred that the Jilong sag could be a target with good hydrocarbon potential for Jurassic strata,while Taibei low uplift could also be a hydrocarbon prospecting area.
引文
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[2]高乐.东海陆架中生代残留盆地特征及勘探方向探讨[J].中国海上油气,2005,17(3):148-152.Gao Le.Mesozoic Remnant Basin Characteristics andHydrocarbon Exploration Direction on East China SeaShelf[J].China Offshore Oil and Gas,2005,17(3):148-152.
[3]冯晓杰,张川燕,王春修,等.东海陆架和台西南盆地中生界及其油气勘探[J].中国海上油气:地质,2001,15(5):306-310.Feng Xiaojie,Zhang Chuanyan,Wang Chunxiu,et al.Mesozoic in the East China Sea Shelf and TaixinanBasin and Its Petroleum Potential[J].China OffshoreOil and Gas:Geology,2001,15(5):306-310.
[4]周蒂.台西南盆地和北港隆起的中生界及其沉积环境[J].热带海洋学报,2002,21(2):50-57.Zhou Di.Mesozoic Strata and SedimentaryEnvironment in SW Taiwan Basin of NE South ChinaSea and Peikang High of Western Taiwan[J].Journalof Tropical Oceanography,2002,21(2):50-57.
[5]须雪豪,陈琳琳,汪企浩.东海陆架盆地中生界地质特征与油气资源潜力浅析[J].海洋石油,2004,24(3):1-7.Xu Xuehao,Chen Linlin,Wang Qihao.Analysis ofMesozoic Geological Characteristics and ResourcePotential in the East China Sea Shelf Basin[J].MarineOil,2004,24(3):1-7.
[6]孙晓猛,王璞珺,郝福江,等.中国东部陆缘中区中新生代区域断裂系统时空分布特征、迁移规律及成因类型[J].吉林大学学报:地球科学版,2005,35(5):554-562.Sun Xiaomeng,Wang Pujun,Hao Fujiang,et al.Space-Time Distribution Features,Migration Regularitiesand Genetic Types of Regional Fault System of Meso-Cenozoic in the Central Section of Epicontinent of theEast China[J].Journal of Jilin University:EarthScience Edition,2005,35(5):554-562.
[7]王海荣,王英民,刘振湖,等.台湾西部前陆盆地的构造格局和演化规律[J].大地构造与成矿学,2006,30(3):275-282.Wang Hairong,Wang Yingmin,Liu Zhenhu,et al.Static Framework and Dynamic Evolution of WesternTaiwan Foreland Basin[J].Geotectonic et Me-tallogenia,2006,30(3):275-282.
[8]高德章,赵金海,薄玉玲,等.东海重磁地震综合探测剖面研究[J].地球物理学报,2004,47(5):853-861.Gao Dezhang,Zhao Jinghai,Bo Yuling,et al.AProfile Study of Gravitative-Magnetic and SeismicComprehensive Survey in the East China Sea[J].Chinese Journal of Geophysics,2004,47(5):853-861.
[9]龚建明,文丽,李慧君,等.墨西哥湾南部晚侏罗纪主力烃源岩的形成条件[J].海洋地质动态,2010,26(3):1-5.Gong Jianming,Wen Li,Li Huijun,et al.TheForming Condition of Upper Jurassic Source Rocks inSouthern Gulf of Mexico[J].Marine Geology Letters,2010,26(3):1-5.
[10]刘建华,黎明碧,方银霞.东海陆架盆地海相中生界及其与邻近古海洋关系探讨[J].热带海洋学报,2005,24(2):1-7.Liu Jianhua,Li Mingbi,Fang Yinxia.MesozoicStrata in East China Sea Shelf Basin and Their Relationship with Adjacent Paleo-Seas[J].Journal of Tropical Oceanography,2005,24(2):1-7.
[11]刘建华,吴健生,方银霞,等.东海陆架盆地的前新生界[J].海洋学报,2007,29(1):66-75.Liu Jianhua,Wu Jiansheng,Fang Yinxia,et al.Pre-Cenozoic Groups in the Shelf Basin of the East China Sea[J].Acta Oceanologica Sinica,2007,29(1):66-75.
[12]王可德,王建平,徐国庆,等.东海陆架盆地西南部中生代地层的发现[J].地层学杂志,2000,24(2):129-131.Wang Kede,Wang Jianping,Xu Guoqing,et al.The Discovery and Division of the Mesozoic Strata in the Southwest of Donghai Shelf Basin[J].Journal ofStratigraphy,2000,24(2):129-131.
[13]朱伟林,王国纯.中国近海前新生代油气勘探新领域探索[J].地学前缘,2000,7(3):215-226.Zhu Weilin,Wang Guochun.New Venture of Exploration of Pre-Cenozoic Oil and Gas in Chinese Offshore Areas[J].Earth Sciences Frontiers,2000,7(3):215-226.
[14]刘守全,蔡乾忠,莫杰.中国海域油气勘探的新领域:应当重视海域中生界油气资源[J].中国地质,2001,28(11):4-9.Liu Shouquan,Cai Qianzhong,Mo Jie.A New Field of Petroleum Exploration in Sea Areas of China:Attention Should be Paid to Mesozoic Marine Petroleum Resources[J].Chinese Geology,2001,18(11):4-9.
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