Petroleum geology characteristics and exploration directions in Espirito Santo Basin, Brazil
-
摘要: 近几年来,桑托斯(Santos)、坎波斯(Campos)2个盆地取得了较大的油气发现,而紧邻这2个盆地的圣埃斯皮里图(Espirito Santo)盆地油气发现较少,勘探程度较低。为了揭示该盆地的油气成藏规律,指明勘探方向,对该盆地的沉积特征、构造演化、烃源岩、圈闭和储集层等进行了深入研究和剖析,初步摸清了该盆地的油气分布规律、成藏主控因素和模式。该盆地位于巴西东海岸被动大陆边缘盆地群,先后经历了裂谷期、过渡期、漂移期3个演化阶段,相应地发育了盐下、盐岩和盐上3套层序。受盐岩底辟作用影响,形成特征迥异的盐下和盐上双层构造,其中盐下受裂谷体系控制,总体上表现为倾向分带的“斜向棋盘”格局,盐上为重力滑覆体系,发育了较多的盐构造类型。阿普第阶Cricare组Neocomian湖相页岩为最好的烃源岩,油气主要分布在上白垩统-新近系的盐上浊积砂中,以岩性圈闭为主。分析认为,浊积砂的分布和运移通道是油气成藏主要控制因素,盆地目前存在6个勘探方向,其中靠近陆岸的斜坡区是油气运移和聚集的最有利区。Abstract: In recent years, a great discovery of petroleum has been made in the Santos and Campos basins; however, little has been made in the Espirito Santo Basin which is adjacent to the two basins. Exploration level of the basin is also low. We studied the sedimentary characteristics, tectonic evolution, source rock, trap and reservoir in detail, and found the petroleum distribution rules, main factors and modes of petroleum accumulation, in order to reveal petroleum enrichment regularity and point out exploration directions in the Espirito Santo Basin. The basin belongs to the passive continental margin basin group near the east coast of Brazil, successively experiencing rifting, transitional and drifting periods, and accordingly developing sub-salt, salt and supra-salt rock sequences. Influenced by the salt diapirism, the basin has formed a very different sub-salt and supra-salt double-layer structure, within which the sub-salt structure shows a propensity for "oblique board" zoning in general under the control of a rift system and the supra-salt structure, controlled by a gravity slide system, has developed various types of salt structure. The Aptian stage Cricare group Neocomian lacustrine shale is the best hydrocarbon source rock and petroleum is mainly distributed in the Upper Cretaceous-Neogene supra-salt turbidite sand, dominated by lithologic traps. The analysis shows that distribution of turbidite sand and migration pathways are the main controlling factors of petroleum accumulation, and the basin has 6 exploration directions at present, among which the near shore slope area is the most favorable for petroleum migration and accumulation.
-
[1] Halbouty M T.Giant oil and gas fields of the decade 1990-1999:AAPG Memoir 78[M].Tulsa:AAPG,2003:15-105. [2] Mann P,Horn M,Cross I.Tectonic setting of 79 giant oil and gas fields discovered from 2000-2007:Implications for future discovery trends[C]//Presentation on April 2,2007,at the 2007 Annual Mee-ting of the AAPG in Long Beach.Tulsa:AAPG,2007. [3] 温志新,童晓光,张光亚,等.巴西被动大陆边缘盆地群大油气田形成条件[J].西南石油大学学报(自然科学版),2012,34(5):1-9. Wen Zhixing,Tong Xiaoguang,Zhang Guangya,et al.Build up conditions of basin group large oil gas field of passive continental margin of Brazil offshore[J].Journal of Southwest Petroleum University(Science & Technology Edition),2012,34(5):1-9. [4] Schenk C J,Brownfield M E,Charpentier R R,et al.Assessment of undiscovered conventional oil and gas resources of South America and the Caribbean,2012.USGS2012-3046.Reston,VA:U.S. Geological Survey,2012. [5] IHS Energy.Espinto Santo Basin.IHS database.2013. [6] 熊利平,邬长武,郭永强,等.巴西海上坎波斯与桑托斯盆地油气成藏特征对比研究[J].石油实验地质,2013,35(4):419-425. Xiong Liping,Wu Changwu,Guo Yongqiang,et al.Petroleum accumulation characteristics in Campos and Santos basins,offshore Brazil[J].Petroleum Geology & Experiment,2013,35(4):419-425. [7] 张金伟.巴西桑托斯盆地盐下大型油气田成藏控制因素[J].特种油气藏,2015,22(3):22-26. Zhang Jinwei.Accumulation-controlling factors of large pre-salt oil and gas fields in the Santos Basin, Brazil[J].Special Oil & Gas Reservoirs,2015,22(3):22-26. [8] 汪新伟,孟庆强,邬长武,等. 巴西大坎波斯盆地裂谷体系及其对盐下成藏的控制作用[J].石油与天然气地质,2015,36(2):193-202. Wang Xinwei,Meng Qingqiang,Wu Changwu,et al.Rift system and its controlling effects upon pre-salt hydrocarbon accumulation in Great Campos Basin,Brazil[J].Oil & Gas Geology,2015,36(2):193-202. [9] Dickson W G,Fryklund R E,Odegard M E,et al.Constraints for plate reconstruction using gravity data:Implications for source and reservoir distribution in Brazilian and West African margin basins[J].Marine and Petroleum Geology,2003,20(3/4):309-322. [10] Guardado L R,Gamboa L A P,Lucchesi C F.Petroleum geology of the Campos Basin,Brazil:A model for a producing Atlantic type basin[M]//Edwards J D,Santogrossi P A.Divergent/passive margin basins:AAPG Memoir 48.Tulsa:AAPG,1989:3-79. [11] Meisling K E,Cobbold P R,Mount V S,et al.Segmentation of an obliquely rifted margin,Campos and Santos Basins,southeastern Brazil[J].AAPG Bulletin,2001,85(11):1903-1924. [12] 陶崇智,殷进垠,陆红梅,等.南大西洋被动陆缘盆地盐岩对油气成藏的影响[J].石油实验地质,2015,37(5):614-618. Tao Chongzhi,Yin Jinyin,Lu Hongmei,et al.Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins[J].Petroleum Geology & Experiment,2015,37(5):614-618. [13] Torsvik T H,Rousse S,Labails C,et al.A new scheme for the ope-ning of the South Atlantic Ocean and the dissection of an Aptian salt basin[J].Geophysical Journal International,2009,177(3):1315-1333. [14] Beglinger S E,Doust H,Cloetingh S.Relating petroleum system and play development to basin evolution:West African South Atlantic basins[J].Marine and Petroleum Geology,2012,30(1):1-25. [15] 李丕龙,张达景,宗国洪.南美区油气分布特征与隐蔽油气藏勘探[J].石油实验地质,2012,34(6):559-563. Li Pilong,Zhang Dajing,Zong Guohong.Petroleum distribution cha-racteristics and subtle reservoir exploration in South America[J].Petroleum Geology & Experiment,2012,34(6):559-563. [16] D'Avila R S F,Biassusi A S,Guirro A C,et al.Urucutuca-Urucutuca (?):A new petroleum system in Espírito Santo Basin,Brazil..http:[C]//www.searchanddiscovery.com/abstracts/html/1998/intl/abstracts/davila.htm. [17] Cosmo C A,Palhares A Jr,Rangel H D,et al.Lagoa Parda field-Brazil Espirito Santo Basin,southeastern Brazil[M]//Foster N H,Beaumont E A.TR:Stratigraphic traps Ⅱ.Tulsa:AAPG,1991:349-360. [18] Bruhn C H L,Walker R G.Internal architecture and sedimentary evolution of coarse-grained,turbidite channel-levee complexes,Early Eocene Regência Canyon,Espírito Santo Basin,Brazil[J].Sedimentology,1997,44(1):17-46.
点击查看大图
计量
- 文章访问数: 1084
- HTML全文浏览量: 173
- PDF下载量: 199
- 被引次数: 0