孟加拉湾深水盆地油气勘探潜力
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摘要
孟加拉湾深水盆地位于印度洋东北部,是亚太地区深水油气勘探最有希望的盆地之一。以前人研究成果为基础,结合DSDP 217、218号钻孔资料,对孟加拉湾深水盆地石油地质特征作了初步分析,认为:孟加拉湾深水盆地地层可划分为3个地震层序,垂向上可识别出古印度陆隆和孟加拉扇2期沉积;构造演化与印度板块裂离冈瓦纳大陆过程密不可分;虽然有机质丰度较低,但已进入成熟区;孟加拉扇水下辫状河道砂体为良好的储集体,孟加拉扇中扇是岩性油气藏最有利的勘探区。
Located in the Northeast Indian Ocean,the deep water basin of the Bay of Bengal is one of the most potential petroliferous basins in Asia-Pacific Region.Based on previous studies and the data of DSDP sites 217 and 218,this article deals with the petroleum geological characteristics of the deep water basin.The results show that(1) the strata of the basin can be divided into 3 seismic sequences,and two stages of sedimentation,the Bengal fan and pre-Bengal fan.(2) The tectonic evolution of the basin has close relation with the separation of Indian plate from Gondwana.(3) Even though the organic matter is low in the deep water basin,it has entered into the a mature stage.(4) Braided channel sandstone in the Bengal fan could be good reservoir bodies.In conclusion,there are possibilities to find lithologic oil and gas reservoirs in the Middle-fan of Bengal.
Located in the Northeast Indian Ocean,the deep water basin of the Bay of Bengal is one of the most potential petroliferous basins in Asia-Pacific Region.Based on previous studies and the data of DSDP sites 217 and 218,this article deals with the petroleum geological characteristics of the deep water basin.The results show that(1) the strata of the basin can be divided into 3 seismic sequences,and two stages of sedimentation,the Bengal fan and pre-Bengal fan.(2) The tectonic evolution of the basin has close relation with the separation of Indian plate from Gondwana.(3) Even though the organic matter is low in the deep water basin,it has entered into the a mature stage.(4) Braided channel sandstone in the Bengal fan could be good reservoir bodies.In conclusion,there are possibilities to find lithologic oil and gas reservoirs in the Middle-fan of Bengal.
引文
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[2]李大伟,李德生,陈长民,等.深海扇油气勘探综述[J].中国海上油气,2007,19(1):18-24.
[3]金春爽,乔德武,姜春艳.国内外深水区油气勘探新进展[J].海洋地质动态,2003,19(10):20-23.
[4]鸣午.能源新贵崛起孟加拉湾[N/OL].中国石油报(网络版),[2010-06-01].http://dzb.zgsyb.com.cn/syb/html/2005-08/12/node_2.htm#.
[5]Curray J R,Emmel F J,Moore D G.The Bengal fan:mor-phology,geometry,stratigraphy,history and process[J].Marine and Petroleum Geology,2003,19:1 191-1 223.
[6]Krishna K S,Michael L.Geoid and gravity anomaly data ofconjugate regions of Bay of Bengal and Enderby Basin—new constraints on breakup and early spreading history between India and Antarctica[J].Solid Earth,2009,114(3):1-37.
[7]艾万铸,李桂香.海洋科学与技术[M].北京:海洋出版社,2000.
[8]Mukhopadhyay M,Krishna M R.Gravity field and deep structure of the Bengal Fan and its surrounding continental margins,northeast Indian Ocean[J].Tectonophysics,1991,186:365-386.
[9]Curray J R.Possible greenschist metamorphism at the base of a22-km sedimentary section,Bay of Bengal[J].Geolo-gy,1991,19:1097-1100.
[10]Subrahmanyam C,Thakur N K,Rao T G.Tectonics of the Bay of Bengal:new insights from satellite-gravity and ship-borne geophysical data[J].Earth and Planetary Sci-ence Letters,1999,171:237-251.
[11]Smith A G,Hallam A.The fit of the southern continents[J].Nature,1970,225:139-144.
[12]Lawver L A,Scotese C R.A revised reconstruction of Gondwanaland[J].Geophys,1987,40:17-23.
[13]Scotese C R,Gahagan L M,Larson R L.Plate tectonic reconstructions of the Cretaceous and Cenozoic Ocean Ba-sins[J].Tectonphysics,1988,55:27-48.
[14]Curray J R,Emmel F J,Moore D G,et al.Structure,tectonics and geological history of the northeastern Indian Ocean[J].The Ocean Basins and Margins,1982,6:399-450.
[15]Royer J Y,Sclater J G,Sandwell D T,et al.Indian Ocean plate reconstructions since the Late Jurassic[J].AGU,1992,70:471-475.
[16]Ramana M V,Ramprasad T,Desa Maria.Seafloor sprea-ding magnetic anomalies in the Enderby Basin,East Ant-arctica[J].Earth and Planetary Science Letters,2001,191:241-255.
[17]Hunt J M.Hydrocarbon and kerogen studies[J].Deep Sea Drilling Project Initial Reports,1974,22:673-675.
[18]Ismail M,Shamsuddin A H M.Organic matter maturity and its relation to time,temperature and depth in the Ben-gal foredeep,Bangladesh[J].Journal of Southeast Asian Earth Sciences,1991(5):381-390.
[19]Simoneit B R,Burlingane A L.Preliminary organic geo-chemical analyses of the site217core samples in the Ben-gal Basin[J].Deep Sea Drilling Project Initial Reports,1974,22:681-692.
[20]Schwenk T,SpieβV,Breitzke M,et al.The architecture and evolution of the Middle Bengal Fan in vicinity of the active channel-levee system imaged by high-resolution seismic data[J].Marine Petroleum Geology.2005,22:637-656.
[2]李大伟,李德生,陈长民,等.深海扇油气勘探综述[J].中国海上油气,2007,19(1):18-24.
[3]金春爽,乔德武,姜春艳.国内外深水区油气勘探新进展[J].海洋地质动态,2003,19(10):20-23.
[4]鸣午.能源新贵崛起孟加拉湾[N/OL].中国石油报(网络版),[2010-06-01].http://dzb.zgsyb.com.cn/syb/html/2005-08/12/node_2.htm#.
[5]Curray J R,Emmel F J,Moore D G.The Bengal fan:mor-phology,geometry,stratigraphy,history and process[J].Marine and Petroleum Geology,2003,19:1 191-1 223.
[6]Krishna K S,Michael L.Geoid and gravity anomaly data ofconjugate regions of Bay of Bengal and Enderby Basin—new constraints on breakup and early spreading history between India and Antarctica[J].Solid Earth,2009,114(3):1-37.
[7]艾万铸,李桂香.海洋科学与技术[M].北京:海洋出版社,2000.
[8]Mukhopadhyay M,Krishna M R.Gravity field and deep structure of the Bengal Fan and its surrounding continental margins,northeast Indian Ocean[J].Tectonophysics,1991,186:365-386.
[9]Curray J R.Possible greenschist metamorphism at the base of a22-km sedimentary section,Bay of Bengal[J].Geolo-gy,1991,19:1097-1100.
[10]Subrahmanyam C,Thakur N K,Rao T G.Tectonics of the Bay of Bengal:new insights from satellite-gravity and ship-borne geophysical data[J].Earth and Planetary Sci-ence Letters,1999,171:237-251.
[11]Smith A G,Hallam A.The fit of the southern continents[J].Nature,1970,225:139-144.
[12]Lawver L A,Scotese C R.A revised reconstruction of Gondwanaland[J].Geophys,1987,40:17-23.
[13]Scotese C R,Gahagan L M,Larson R L.Plate tectonic reconstructions of the Cretaceous and Cenozoic Ocean Ba-sins[J].Tectonphysics,1988,55:27-48.
[14]Curray J R,Emmel F J,Moore D G,et al.Structure,tectonics and geological history of the northeastern Indian Ocean[J].The Ocean Basins and Margins,1982,6:399-450.
[15]Royer J Y,Sclater J G,Sandwell D T,et al.Indian Ocean plate reconstructions since the Late Jurassic[J].AGU,1992,70:471-475.
[16]Ramana M V,Ramprasad T,Desa Maria.Seafloor sprea-ding magnetic anomalies in the Enderby Basin,East Ant-arctica[J].Earth and Planetary Science Letters,2001,191:241-255.
[17]Hunt J M.Hydrocarbon and kerogen studies[J].Deep Sea Drilling Project Initial Reports,1974,22:673-675.
[18]Ismail M,Shamsuddin A H M.Organic matter maturity and its relation to time,temperature and depth in the Ben-gal foredeep,Bangladesh[J].Journal of Southeast Asian Earth Sciences,1991(5):381-390.
[19]Simoneit B R,Burlingane A L.Preliminary organic geo-chemical analyses of the site217core samples in the Ben-gal Basin[J].Deep Sea Drilling Project Initial Reports,1974,22:681-692.
[20]Schwenk T,SpieβV,Breitzke M,et al.The architecture and evolution of the Middle Bengal Fan in vicinity of the active channel-levee system imaged by high-resolution seismic data[J].Marine Petroleum Geology.2005,22:637-656.
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