台湾北方海域东引岛盆地南段油气潜能评估
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摘要
运用中油公司于台湾北方海域东引岛盆地南段约3200km2范围震测资料，进行此盆地的构造演化及沉积体系综合性研讨，认为盆地张裂期间是以断块旋转方式形成，盆地可能未经区域性上抬即下陷。因此湖相沉积可能仅存在于下古新统下部，下古新统上部可能已进入半咸水及至咸水的环境。粗粒之沉积物，可能存在于下古新统地层层序A及层序B上覆砂体中。此等粗粒沉积物富含长石，利于次生孔隙之生成，成为良好油气储集层。层序B及C可能多细颗粒沉积物，富含木型有机质，既可为盖层又可为生油岩。因此认为本研究区及与其地质状况相若之盆地，均有多种油气封闭类型存在。鉴于盆地颇具油气探勘潜能，建议择一构造高区，针对潜山封闭形态进行钻探。
Utilizing the seimic data on 3200 km2 area of Tungingtao Basin,Northern Offshore Taiwan,obtained by Chinese Petroleum Corp.,the authors study the tectonic evolution and depositional systems of the basin comprehensively,and think it was formed by block rotation during its stretching period without undergoing regional uplifting and sagging. Therefore,lacustrine deposit can only exist in the low section of the early Paleocene,and its upper section has been in brackish water and salt water environment' Coarse sediments only exist in sand body overlaying sequence A and B of the low section in the early Paleocene,they are rich in feldspar and easily creat secondary pore,so they can be good reservoir rock. Sequence B and C with much fine sediments,rich in wood organic matter,can be cap rock and source rock. Hence,we think our research area or other basin similar to it in geological background have several varieties of traps. Because of the good exploration potential of the basin,we suggest choosing a high structure section to drill and survey according to the shape of the subterranean traps.
Utilizing the seimic data on 3200 km2 area of Tungingtao Basin,Northern Offshore Taiwan,obtained by Chinese Petroleum Corp.,the authors study the tectonic evolution and depositional systems of the basin comprehensively,and think it was formed by block rotation during its stretching period without undergoing regional uplifting and sagging. Therefore,lacustrine deposit can only exist in the low section of the early Paleocene,and its upper section has been in brackish water and salt water environment' Coarse sediments only exist in sand body overlaying sequence A and B of the low section in the early Paleocene,they are rich in feldspar and easily creat secondary pore,so they can be good reservoir rock. Sequence B and C with much fine sediments,rich in wood organic matter,can be cap rock and source rock. Hence,we think our research area or other basin similar to it in geological background have several varieties of traps. Because of the good exploration potential of the basin,we suggest choosing a high structure section to drill and survey according to the shape of the subterranean traps.
引文
[1]Brown F F Jr.Seismic stratigraphic and Depositional sys-terns Analysis of Basins in Offshore Taiwan. Unpublished CPC File,1986
[2] Cloos E.Experimental Analysis of Gulf Coast FracturePatterns. AAPG Bull,1968,52:420~444
[3] Huang Ting-Chang .Evaluation of Tertiary Basins in Off-shore Taiwan.Unpublished.CPC File,1984
[4] Ke R.and J D.Pigott.Episodic Rifting and Subsidence inthe South China Sea.AAPG Bull ,1986,70(9):1136～1155
[5]Lee Tung-Yi Seismic Stratigraphy and Tectonic Evolutionof Tungingtao Basin, Offshore Northern Taiwan. Thesis, Unpubfished 1987
[6]Liu Guanding.Geophysical and Geological Exploration andHydrocarbon Prospects of the East China Sea.In China Earth Sci-ences,1989,1(1):43～58
[7] Lowell J D.Structural Styles in Petroleum Exploration.OGCI Publications,1985
[8] Morley C K,Nelson R A,Pation T L,and Munn S G.Transfer Zones in the East African Rift System and Their Relevenceto Hydrocarbon Exploration in Rifts.AAPG Bull 1990,74(8):1234～1253.
[10] Tang C H and Chi W R.Tectonic Evolution and Hydro-carbon Potential of Tungingtao Basin,Northern Offshore Taiwan(SW East China Sea):The Second International Symposium on theTectonic Evdution and Petroleum Potential of the East China Sea.Held at Standford Uni. 1991
[11] Tangjia-Ming.Mechanisms ofEast China Sea BasinFormation and Evaluation of Sags:The Second International Symgsium on the Tectonic Evolution and Petroleum Potential of the EastChina SeaHeld at Standford Uni. 1991
[12] Zhou Z,Zhao J and Yin P L.Characteristics and TectonicEvolution of the East China Sea:In Z.zhu,Chinese SedimentaryBasins,Elsevier,Ch. 14,PP. 165～170,1989
[13]周志武,殷培龄.东海地质调查的回顾与含油气远景展望.石油天然气地质,1985,6(1):1～13
[14]张德林.渤海湾盆地第三纪箕状凹陷陡翼的石油地质特征.石油地球物理勘探,1991,26(4):499～513
[2] Cloos E.Experimental Analysis of Gulf Coast FracturePatterns. AAPG Bull,1968,52:420~444
[3] Huang Ting-Chang .Evaluation of Tertiary Basins in Off-shore Taiwan.Unpublished.CPC File,1984
[4] Ke R.and J D.Pigott.Episodic Rifting and Subsidence inthe South China Sea.AAPG Bull ,1986,70(9):1136～1155
[5]Lee Tung-Yi Seismic Stratigraphy and Tectonic Evolutionof Tungingtao Basin, Offshore Northern Taiwan. Thesis, Unpubfished 1987
[6]Liu Guanding.Geophysical and Geological Exploration andHydrocarbon Prospects of the East China Sea.In China Earth Sci-ences,1989,1(1):43～58
[7] Lowell J D.Structural Styles in Petroleum Exploration.OGCI Publications,1985
[8] Morley C K,Nelson R A,Pation T L,and Munn S G.Transfer Zones in the East African Rift System and Their Relevenceto Hydrocarbon Exploration in Rifts.AAPG Bull 1990,74(8):1234～1253.
[10] Tang C H and Chi W R.Tectonic Evolution and Hydro-carbon Potential of Tungingtao Basin,Northern Offshore Taiwan(SW East China Sea):The Second International Symposium on theTectonic Evdution and Petroleum Potential of the East China Sea.Held at Standford Uni. 1991
[11] Tangjia-Ming.Mechanisms ofEast China Sea BasinFormation and Evaluation of Sags:The Second International Symgsium on the Tectonic Evolution and Petroleum Potential of the EastChina SeaHeld at Standford Uni. 1991
[12] Zhou Z,Zhao J and Yin P L.Characteristics and TectonicEvolution of the East China Sea:In Z.zhu,Chinese SedimentaryBasins,Elsevier,Ch. 14,PP. 165～170,1989
[13]周志武,殷培龄.东海地质调查的回顾与含油气远景展望.石油天然气地质,1985,6(1):1～13
[14]张德林.渤海湾盆地第三纪箕状凹陷陡翼的石油地质特征.石油地球物理勘探,1991,26(4):499～513
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