下刚果盆地碳酸盐岩盐筏体沉积规律

doi:10.7623/syxb201603008

石油学报 ›› 2016, Vol. 37 ›› Issue (3): 360-370.DOI: 10.7623/syxb201603008

下刚果盆地碳酸盐岩盐筏体沉积规律

张彪¹, 于水¹, 李红², 郝立华¹, 刘小龙¹

1. 中海油研究总院海外评价中心北京 100028;
2. 中海油能源发展股份有限公司工程技术分公司天津 300450

收稿日期:2015-09-10 修回日期:2016-01-13 出版日期:2016-03-25 发布日期:2016-04-12
通讯作者: 张彪,男,1988年10月生,2010年获西安科技大学学士学位,2013年获成都理工大学硕士学位,现为中海油研究总院工程师,主要从事海外油气勘探工作。Email:zhangbiao7@cnooc.com.cn
作者简介:张彪,男,1988年10月生,2010年获西安科技大学学士学位,2013年获成都理工大学硕士学位,现为中海油研究总院工程师,主要从事海外油气勘探工作。Email:zhangbiao7@cnooc.com.cn
基金资助:
国家重大科技专项(2011ZX05030-003)和中国海洋石油总公司京直地区第三届青年科技与管理创新研究活动课题(JZTW2015KJ07)资助。

Sedimentary laws of carbonate salt raft in Lower Congo Basin

Zhang Biao¹, Yu Shui¹, Li Hong², Hao Lihua¹, Liu Xiaolong¹

1. Overseas Assessment Center, CNOOC Research Institute, Beijing 100028, China;
2. CNOOC EnerTech-Drilling and Production Co., Tianjin 300450, China

Received:2015-09-10 Revised:2016-01-13 Online:2016-03-25 Published:2016-04-12

摘要/Abstract

摘要：

基于盐筏活动过程中对古地貌和局部可容空间的影响,产生了对上覆碳酸盐岩沉积相带和地层展布样式的控制作用这一认识,通过对下刚果盆地A区块内碳酸盐岩盐筏体钻井岩相、沉积相与地震相特征分析,对盐筏体内部碳酸盐岩沉积规律进行了总结。研究结果表明:1区块盐筏体内共发育A型、B型和C型3类地震相,从盐筏活动初期至晚期,盐筏体内部地震相垂向上呈现C型-B型-A型演化序列。2C型地震相表现出不规则状杂乱反射、弱振幅、连续性较差的特征,为盐筏活动初期产物,主要为泥灰岩非储层相;A型地震相具有席状、强振幅、中-高频率、连续反射特征,为盐筏活动晚期产物,沉积稳定分布,以颗粒滩与砂质碎屑滩为特征,二者均是盐筏活动程度较弱背景下的沉积产物;B型地震相在盐筏强烈活动中形成,由蠕虫状、中等振幅、中-高频率、断续状的B1型地震相、层状、中等振幅、低频、连续反射的B2型地震相以及席状、中-弱振幅、中-高频率、连续反射的B3型地震相三者组合而成。3横向上表现出B1型-B2型-B3型-C型演化过程,由盐隆高部位向低部位依次呈现高能颗粒滩相向滩间海相转变的过程。4周期性"滑脱-沉积"作用下,形成盐筏体内以B型地震相为代表的帚状地层展布样式;根据盐隆高部位位置变化,盐筏体内常形成"原地顶隆型"和"偏移旋转型"2种沉积形态,主要体现在高能颗粒滩相带的空间叠置与迁移方向差异。碳酸盐岩盐筏体作为被动大陆边缘含盐盆地构造-沉积演化阶段产物,其发育特征具有广泛的适用性。盐筏体的形成过程不仅是储层建造的过程,而且常形成良好的油气运聚系统,具有重要的石油地质意义。

关键词: 碳酸盐岩盐筏体, 地震相演化序列, 帚状结构, 原地顶隆, 偏移旋转, 下刚果盆地

Abstract:

Based on the influences of salt raft activities on paleo-geomorphology and local accommodation, the control effect on overlying carbonate sedimentary facies belt and stratigraphic distribution pattern was identified. Through analyzing the drilling lithology, sedimentary facies and seismic facies of carbonate salt raft in Block A, Lower Congo Basin, the carbonate sedimentary laws in salt raft were summarized. The research results indicate that:(1) Three types of seismic facies, i.e., Type A, B and C, were developed in carbonate salt raft. From the early stage to late stage of salt raft activities, the seismic facies within salt raft show C-B-A evolution sequence in vertical direction.(2) Type C seismic facies is characterized by irregular chaotic reflection, low amplitude and poor continuity as the product in the early stage of salt raft activity, dominated by marlstone non-reservoir facies; Type A seismic facies is characterized by sheeted high amplitude, mid-high frequency and continuous reflection as the product in the large stage of salt raft activity, where sediments are stablely distributed and characterized by grain shoals and sandy grain shoals. Both are sedimentary products in the context of weak salt raft activity. Type B seismic facies is formed in intense salt raft activities, consisting of wormlike imtermittent Type B1 seismic facies with medium amplitude and mid-high frequency, layered Type B2 with medium amplitude, low frequency and continuous reflection and sheeted Type B3 with mid-low amplitude, mid-high frequency and continuous reflection.(3) B1-B2-B3-C evolution sequence is presented in lateral direction, and the transition process is from high-energy grain shoal facies in the high position of salt uplift to intershoal marine facies in the low position.(4) Under the periodical "slip-sedimentation", broom-shaped stratigraphic distribution pattern is formed, represented by Type B seismic facies in salt raft. According to the changes in the high position of salt uplift, two sedimentary types are often formed in salt raft, i.e., autochthonous top uplift and shifting rotation with the main difference in spatial stacking and migration direction of high-energy grain shoal facies belt. As the product of tectonic-sedimentary evolution in salt-bearing basin on passive continental margin, carbonate salt raft shows the development characteristics with wide applicability. The formation process of carbonate salt raft is not only a process of reservoir building, but also has a favorable hydrocarbon migration and accumulation system with a great petroleum geologic significance.

Key words: carbonate salt rafts, seismic facies evolution sequence, brush stracture, autochthonous salt uplift, shifting rotation, Lower Congo Basin

中图分类号:

TE121.3

张彪, 于水, 李红, 郝立华, 刘小龙. 下刚果盆地碳酸盐岩盐筏体沉积规律[J]. 石油学报, 2016, 37(3): 360-370.

Zhang Biao, Yu Shui, Li Hong, Hao Lihua, Liu Xiaolong. Sedimentary laws of carbonate salt raft in Lower Congo Basin[J]. Acta Petrolei Sinica, 2016, 37(3): 360-370.

参考文献

[1] Harris N B,Freeman K H,Pancost R D,et al.The character and origin of lacustrine source rocks in the Lower Cretaceous synrift section,Congo Basin,West Africa[J].AAPG Bulletin,2004,88(8):1163-1184.
[2] 邓荣敬,邓运华,于水,等.西非海岸盆地群油气勘探成果及勘探潜力分析[J].海洋石油,2008,28(3):11-19.
Deng Rongjing,Deng Yunhua,Yu Shui,et al.Hydrocarbon exploration achievements and exploration potential of coastal basins in West Africa[J].Offshore Oil,2008,28(3):11-19.
[3] 林卫东,陈文学,熊利平,等.西非海岸盆地油气成藏主控因素及勘探潜力[J].石油实验地质,2008,30(5):450-455.
Lin Weidong,Chen Wenxue,Xiong Liping,et al.Pool forming constrains and the hydrocarbon exploration potential of the West Africa coast basins[J].Petroleum Geology & Experiment,2008,30(5):450-455.
[4] 张树林,邓运华.下刚果盆地油气勘探策略[J].海洋地质动态,2009,25(9):24-29.
Zhang Shulin,Deng Yunhua.Petroleum exploration strategy of Lower Congo Basin[J].Marine Geology Letters,2009,25(9):24-29.
[5] 丁汝鑫,陈文学,熊利平,等.下刚果盆地油气成藏主控因素及勘探方向[J].特种油气藏,2009,16(5):32-35.
Ding Ruxin,Chen Wenxue,Xiong Liping,et al.Main factors controlling hydrocarbon accumulation and exploration orientation in Lower Congo Basin[J].Special Oil and Gas Reservoirs, 2009,16(5):32-35.
[6] 冯杨伟,屈红军,张功成,等.西非被动大陆边缘构造:沉积演化及其对生储盖的控制作用[J].海相油气地质,2010,15(3):45-51.
Feng Yangwei,Qu Hongjun,Zhang Gongcheng,et al.Toctonic-sedimentary evolution and its control on source-reservior-cap rocks in passive continental margin,West Africa[J].Marine Origin Petroleum Geology,2010,15(3):45-51.
[7] 杨晓娟,李军,于炳松.下刚果盆地构造特征及油气勘探潜力[J].地球物理学进展,2012,27(6):2585-2593.
Yang Xiaojuan,Li Jun,Yu Bingsong.Structural feature and exploratory potential of the Lower Congo Basin[J].Progress in Geophysics,2012,27(6):2585-2593.
[8] 胡湘瑜.西非被动大陆边缘盆地群大油气田形成条件与成藏模式[J].现代地质,2013,27(1):133-142.
Hu Xiangyu.Major oil and gas fields formation conditions and accumulation models of West African passive continental margin basins[J].Geoscience,2013,27(1):133-142.
[9] IHS.Lower Congo Basin[R].IHS Basin Monitor,2013.
[10] Valle P J,Gjelberg J G,Helland-Hansen W.Tectonostratigraphic development in the eastern Lower Congo Basin,offshore Angola,West Africa[J].Marine and Petroleum Geology,2001,18(8):909-927.
[11] 赵灿,郑荣才,于水,等.下刚果盆地A区块下白垩统阿尔布阶混积相研究[J].岩性油气藏,2011,23(3):84-90.
Zhao Can,Zheng Rongcai,Yu Shui,et al.Study on mixed sedimentary facies of Lower Cretaceous Albian in block A of Lower Congo Basin[J].Lithologic Reservoirs,2011,23(3):84-90.
[12] 程涛,陶维祥,于水,等.下刚果盆地北部碳酸盐岩层序地层分析[J].特种油气藏,2012,19(2):25-28.
Cheng Tao,Tao Weixiang,Yu Shui,et al.Sequence stratigraphy of the carbonate rock in northern Lower Congo Basin[J].Special Oil and Gas Reservoirs,2012,19(2):25-28.
[13] 于水,文华国,郝立华,等.下刚果盆地A区块下白垩统Albian阶沉积层序与古地理演化[J].成都理工大学学报:自然科学版,2012,39(4):353-361.
Yu Shui,Wen Huaguo,Hao Lihua,et al.Sedimentary sequence and paleogeographic evolution of Albian Stage,Lower Cretaceous in Block A of Lower Congo Basin[J].Journal of Chengdu University of Technology:Science & Technology Edition,2012,39(4):353-361.
[14] 解吉高,刘春成,刘志斌,等.下刚果盆地北部中新统深水浊积岩储层及含油性地震预测[J].石油学报,2015,36(1):33-40.
Xie Jigao,Liu Chuncheng,Liu Zhibin,et al.Seismic prediction of the reservoir and oil-bearing property of Miocene deep-water turbidite in northern Lower Congo Basin[J].Acta Petrolei Sinica,2015,36(1):33-40.
[15] Hudec M R,Jackson M P A.The salt mine:a digital atlas of salt tectonics[M].Austin,TX:Bureau of Economic Geology,American Association of Petroleum Geologists,2011.
[16] Lundin E R.Thin-skinned extensional tectonics on a salt detachment,northern Kwanza Basin,Angola[J].Marine and Petroleum Geology,1992,9(4):405-411.
[17] Duval B,Cramez C,Jackson M P A.Raft tectonics in the Kwanza Basin,Angola[J].Marine and Petroleum Geology,1992,9(4):389-404.
[18] 吴珍云,尹宏伟,汪新,等.裂谷盆地盐构造形成演化及油气成藏地质意义:以苏丹红海裂谷盆地为例[J].石油学报,2014,35(5):879-889.
Wu Zhenyun,Yin Hongwei,Wang Xin,et al.Simulation of salt structure formation and evaluation of its geological significance to oil-gas accumulation:a case study of the Sudanese Red Sea rift basin[J].Acta Petrolei Sinica,2014,35(5):879-889.
[19] de Ruiter P A C.The Gabon and Congo basins salt deposits[J].Economic Geology,1979,74(2):419-431.
[20] Brice S E,Cochran M D,Pardo G,et al.Tectonics and sedimentation of the south Atlantic rift sequence:Cabinda,Angola:rifted margins:field investigations of margin structure and stratigraphy[M]//Watkins J S,Drake C L.Studies in continental margin geology.Tulsa:AAPG,1982:5-18.
[21] Uchupi E.The tectonic style of the Atlantic Mesozoic rift system[J].Journal of African Earth Sciences(and the Middle East),1989,8(2/4):143-164.
[22] Chernikoff A,Hernández J G,Schatzinger R.Mesozoic extensional tectonics:its impact on oil accumulations in Campeche Sound,Gulf of Mexico[J].The Leading Edge,2006,25(10):1224-1234.
[23] 熊利平,刘延莉,霍红.西非海岸南、北两段主要含油气盆地油气成藏特征对比[J].石油与天然气地质,2010,31(4):410-419.
Xiong Liping,Liu Yanli,Huo Hong.Comparison of the hydrocarbon accumulation patterns of petroliferous basins between the north and south parts of the West African coast[J].Oil and Gas Geology,2010,31(4):410-419.

下刚果盆地碳酸盐岩盐筏体沉积规律

Sedimentary laws of carbonate salt raft in Lower Congo Basin

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