塔里木盆地巴楚隆起中、下寒武统高精度层序地层与沉积特征

doi:10.11743/ogg20120109

摘要/Abstract

摘要：

针对塔里木盆地寒武系埋深大、钻井少的问题,以层序地层学、沉积学理论为指导,对巴楚隆起中下寒武统膏盐岩、碳酸盐岩、红褐色泥岩互层发育的特殊岩性组合开展了深入研究,提出该沉积体系中GR泥质含量高低不能反映相对海平面升降,精细沉积相划分是识别基准面旋回升降变化的关键。以此为依据,将寒武系划分为3个超层序,7个三级层序,其中中、下寒武统发育4个三级层序,上寒武统发育3个三级层序,并分析了各层序发育特征,建立寒武系等时地层对比格架。巴楚隆起中、下寒武统属蒸发台地-局限台地沉积体系,可识别出2种相、5种亚相、19种微相,其中下寒武统以发育局限台地相灰坪、灰云坪、膏云坪、云坪沉积为主,东西沉积存在差异,西部以膏云坪沉积为主,东部主要为云坪沉积,而中寒武统以发育蒸发台地相潮间坪和盐湖沉积为主,巴3井-巴1井一线以西为潮上坪沉积,以东主要为潮间坪和盐湖沉积。

关键词: 蒸发岩, 沉积相, 层序地层, 寒武系, 塔里木盆地

Abstract:

The Cambrian is of large burial depth and few exploration wells in Tarim Basin,The specific lithologic assemblage consisting of intebedded evaporites,carbonate rocks and bronzing mudstones in the moddle-lower Camberan is analyzed using sequence stratigraphy and sedimentology theories.We suggest that clay contents of GR within the depositional system can not reflect the relative sea level change,and that fine sedimentary facies division is key to base-level cycle identification.The Cambrian is divided into 3 supersequences and 7 third-order sequences,among which 4 third-order sequences occur in the Middle-Lower Cambrian and 3 in the Upper Cambrian.In addition,the features of each third-order sequence are analyzed and an isochronous stratigraphic framework is built for the Cambrian.The sedimentary environments of the Middle-Lower Cambrian in Bachu Uplift are evaporate platform and restricted platform,where 2 sedimentary facies,5 subfacies and 19 microfacies are identified.The Lower Cambrian is mainly of restricted platform deposits dominated by lime flat,limestone-dolomite flat,gypsum-dolomite flat and dolomite flat deposition.In Bachu Uplift,the gypsum-dolomite flat deposits dominate in the west and dolomite flat deposits in the east.In contrast,the major sedimentary facies of the Middle Cambrian is evaporate platform dominated by intertidal flat and saline lacustrine deposits.Taking the Ba3-Ba1 wells as the line of demarcation,the Middle Cambrian is mainly of supertidal flat deposits to its west,and is dominated by intertidal flat and salt lake deposits to its east.

Key words: evaporite, sedimentary facies, sequence stratigraphy, Cambrian, Tarim Basin

中图分类号:

TE121.3

刘忠宝,杨圣彬,焦存礼,等. 塔里木盆地巴楚隆起中、下寒武统高精度层序地层与沉积特征[J]. 石油与天然气地质, 2012, 33(1): 70-76. doi: 10.11743/ogg20120109 Liu Zhongbao,Yang Shengbin,Jiao Cunli,et al. High resolution sequence stratigraphy and sedimentary characteristics of the Middle-Lower Cambrian in Bachu Uplift,the Tarim Basin[J]. Oil & Gas Geology, 2012, 33(1): 70-76. doi: 10.11743/ogg20120109

参考文献

[1] 云露,翟晓先.塔里木盆地塔深1井寒武系储层与成藏特征探讨[J].石油与天然气地质,2008,29(6):726-732. Yun Lu,Zhai Xiaoxian.Discussion on characteristics of the Cambrian reservoirs and hydrocarbon accumulation in well Tashen-1,Tarim basin[J].Oil & Gas Geology,2008,29(6):726-732. [2] 何治亮,魏修成,钱一雄,等.海相碳酸盐岩优质储层形成机理与分布预测[J].石油与天然气地质,2011,32(4):489-498. He Zhiliang,Wei Xiucheng,Qian Yixiong,et al.Forming mechanism and distribution prediction of quality marine carbonate reservoirs[J].Oil & Gas Geology,2011,32(4):489-498. [3] 郑和荣,吴茂炳,邬兴威,等.塔里木盆地下古生界白云岩储层油气勘探前景[J].石油学报,2007,28(2):1-8. Zheng Herong,Wu Maobing,Wu Xingwei,et al.Oil-gas exploration prospect of dolomite reservoir in the lower Paleozoic of Tarim basin[J].Acta Petrolei Sinica,2007,28(2):1-8. [4] 陈新军,蔡希源,徐旭辉,等,塔中地区寒武—奥陶系层序地层格架与沉积演化特征[J].新疆地质,2006,24(3):276-280. Chen Xinjun,Cai Xiyuan,Xu Xuhui,et al.The research on sedimentation featrues in Cambrian-Ordovician sequence frame in the center of Tarim[J].Xinjiang Geology,2006,24(3):276-280. [5] 朱德丰,刘和甫,萧德铭,等.塔里木盆地西部地区主要石油地质特征及油气远景[J].地质科学,2008,43(3):473-487. Zhu Defeng,Liu Hefu,Xiao Deming,et al.Main petroleum geological characteristics and oil-gas potentials in the western Tairim basin [J].Chinese Journal of Geology,2008,43(3):473-487. [6] 肖中尧,崔会英,谢增业,等.塔里木盆地台盆区天然气地球化学特征[J].天然气地球科学,2007,18(6):784-788. Xiao Zhongyao,Cui Huiying,Xie Zengye,et al.Gas geochemical characteristics of platform-basin region in Tarim basin[J].Natural Gas Geoscience,2007,18(6):784-788. [7] 周新源,王清华,杨文静,等.塔里木盆地天然气资源及勘探方向[J].天气地球科学,2005,16(1):8-11. Zhou Xinyuan,Wang Qinghua,Yang Wenjing,et al.The resource and exploration of natural gas in Tarim basin[J].Natural Gas Geoscience,2005,16(1):8-11. [8] 冯增昭,鲍志东,吴茂炳,等.塔里木地区寒武纪岩相古地理[J].古地理学报,2006,8(4):427-439. Feng Zengzhao,Bao Zhidong,Wu Maobing,et al.Lithofacies palaeogeography of the Cambrian in Tarim area[J].Journal of Palaeogeography,2006,8(4):427-439. [9] 高志前,樊太亮,焦志峰,等.塔里木盆地寒武—奥陶系碳酸盐岩台地样式及其沉积响应特征[J].沉积学报,2006,24(1):19-27. Gao Zhiqian,Fan Tailiang,Jiao Zhifeng,et al.The structural types and depositional characteristics of carbonate platform in the Cambrian-Ordovician of Tarim basin[J].Acta Sedimentologica Sinica,2006,24(1):19-27. [10] 于炳松.塔里木盆地北部寒武—奥陶纪层序地层格架[J].矿物学报,1996,16(3):298-303. Yu Bingsong.Sequence stratigraphy framework of the Cambrian-Ordovician in northern Tarim basin[J].Acta Mineralogica Sinica,1996,16(3):298-303. [11] 于炳松,陈建强,林畅松.塔里木地台北部寒武纪—奥陶纪层序地层及其与扬子地台和华北地台的对比[J].中国科学:D 辑,2001,31(1):17-26. Yu Bingsong,Chen Jianqiang,Lin Changsong.The sequence stratigraphy of Cambrian-Ordovician in Tarim basin and its relationship with the Yangtze platform and North China plat form comparison[J].Science in China:Series D,2001,31(1):17-26. [12] 蔡习尧,毛树华,钱一雄,等.塔里木盆地巴楚隆起寒武系划分与对比[J].新疆石油地质,2009,30(1):38-42. Cai Xiyao,Mao Shuhua,Qian Yixiong,et al.Stratigraphic classification and correlation of Cambrian in Bachu uplift Tarim basin[J].Xinjiang Petroleum Geology,2009,30(1):38-42. [13] 肖朝晖,王招明,姜仁旗,等.塔里木盆地寒武系碳酸盐岩层序地层特征[J].石油与天然气地质,2011,32(1):1-10. Xiao Zhaohui, Wang Zhaoming, Jiang Renqi,et al.Sequence stratigraphic features of the Cambrian carbonate rocks in the Tarim Basin[J].Oil & Gas Geology,2011,32(1):1-10. [14] 潘文庆,王招明,孙崇浩,等.塔里木盆地下古生界碳酸盐岩层序界面类型划分及其意义[J].石油与天然气地质,2011,32(4):531-541. Pan Wenqing,Wang Zhaoming,Sun Chonghao,et al.Classifications of sequence boundaries in the Lower Paleozoic carbonates in Tarim Basin and their significances[J].Oil & Gas Geology,2011,32(4):531-541. [15] 姜在兴.沉积学[M].北京:石油工业出版社,2003:236-240. Jiang Zaixing.Sedimentology[M].Beijing:Petroleum Industry Press,2003:236-240. [16] 何宏,彭苏萍,邵龙义.巴楚隆起与阿瓦提凹陷寒武系及奥陶系沉积古地理分析[J].煤田地质与勘探,2002,30(6):1-4. He Hong,Peng Suping,Shao Longyi.Sedimentology and palaeogeography of the Cambrian-Ordovician in Bachu uplift and Awati depression,the Tarim Basin[J].Coal Geology & Exploration,2002,30(6):1-4.