四川含油气叠合盆地基本特征
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摘要
随着近年来四川盆地油气勘探的不断突破,重新审视其基本地质特征和油气成藏特点变得迫切而必要。四川盆地是典型的叠合盆地,显生宙以来经历了震旦纪—中三叠世伸展体制下的差异升降和被动大陆边缘(海相碳酸盐岩台地)、晚三叠世—始新世挤压体制下的褶皱冲断和复合前陆盆地(陆相碎屑岩盆地)、渐新世以来的褶皱隆升改造(构造盆地)3大演化阶段以及晚三叠世(被动大陆边缘→前陆盆地、海相碳酸盐岩—海相碎屑岩、海相碎屑岩→陆相碎屑岩)、晚白垩世(前陆盆地沉降中心的迁移、秦岭构造域→青藏构造域、沉积→部分隆升剥蚀)、始新世(外流盆地→内流瓮地、沉积盆地→地貌盆地、沉积→整体隆升剥蚀)3大关键构造变革/沉积转换期。印支期以来,四川盆地受周边多个方向造山带(北缘秦岭造山带、东缘雪峰陆内构造系统、西南缘青藏高原)多期活动影响,形成多组、多期构造的复合—联合叠加。现今盆山构造格局呈现明显的三分性(地貌、基底和构造形迹),发育突变型和渐变型两类盆山边界。按盆地不同区域盆山结构特征、定型时间和主控因素,可将四川盆地划分为5大盆山结构区:Ⅰ区:川北突变型盆山结构区(秦岭构造控制域);Ⅱ区:川西突变型盆山结构区(青藏构造控制域);Ⅲ区:川东渐变型盆山结构区(雪峰构造控制域);Ⅳ区:川西南渐变型盆山结构区(青藏—雪峰—基底构造联合控制域)和Ⅴ区:川中原地隆起—盆地区(基底构造控制域)。四川盆地是我国西部重要的含油富气盆地,勘探潜力巨大。这是由充足的烃源和良好的保存条件所决定的。首先,多阶段盆地叠合演化造就了5套重要的烃源层,总厚度可达1500~2500m,有机碳含量高,生烃量大,成气率高。其次,中下三叠统膏盐岩的发育对海相油气起了重要的封闭作用,而冲断带—前陆盆地二元结构和隆升剥蚀作用较弱的特点大大增强了突变型盆山结构区的保存条件。此外,晚白垩世以来的隆升作用使古气藏(储气中心)发生调整或破坏的同时,也为现今气藏(保气中心)的形成创造了条件,隆升作用还造成流体跨层流动和天然气爆发式成藏。叠合盆地演化的多阶段性、多组多期构造的复合—联合作用、储层的非均质性和天然气的活动性决定了四川盆地油气勘探的复杂性、长期性和曲折性,同时说明不能用单一的勘探思路、勘探方法和成藏理论来指导整个盆地的油气勘探,即勘探策略也应多样化。
        The recent breakthroughs in natural gas exploration in Sichuan Basin have been making it urgent and indispensable to reinvestigate its basic geological features and characteristics of hydrocarbon accumulation.Being a typical superimposed basin,Sichuan Basin has experienced three major phases of basin evolution during the Phanerozoic time as follows:marine carbonate platform with differential subsidence-uplift in extensional setting from Sinian to Middle Triassic, continental clastic basin with fold-and-thrust deformation under compressive background from Late Triassic to Eocene,and uplift and structural modification since Oligocene.Simultaneously, Sichuan Basin has also gone through three key periods of tectonic transformation.The first tectonic transformation in Late Triassic time is characterized by the changes of tectonic settings from extension to compression,basin property from passive continental margin to foreland basin,deposition from marine carbonate to marine clastic and to continental clastic.The second tectonic transformation in early Late Cretaceous is symbolized by the migration of foredeep, tectonic domain change from Qinling orogenic belt to Tibet Plateau,and the change from deposition to partial uplift and erosion.The last tectonic transformation in Eocene is represented by the changes from exorheic basin to endorheic basin,from sedimentary basin to topographic basin,and from deposition to overall uplift and erosion.Affected jointly by peripheral structural belts since Indosinian movement(the Qinling orogenic belt on the north side,Xuefeng intracontinental tectonic system on the east and southeast sides,and Tibet Plateau on the west and southwest sides),multi-stage and multi-direction structures were superimposed in Sichuan Basin.The present-day basin-orogen configuration in Sichuan Basin and adjacent regions exhibits clear trisection in topography,basement and surface structural features,and two types of basin-orogen boundaries,i.e.break and gradual.According to the type of basin-orogen boundary,developing history and controlling factors,the Sichuan Basin can be divided into five basin-orogen structure units;Unit Ⅰ-North Sichuan break basin-orogen structure area (controlled by Qinling tectonic domain),Unit Ⅱ-West Sichuan break basin-orogen structure area(controlled by Tibet tectonic domain),Unit Ⅲ-East Sichuan gradual basin-orogen structure area(controlled by Xuefeng tectonic domain),Unit Ⅳ-Southwest Sichuan gradual basin-orogen structure area(controlled jointly by Tibet,Xuefeng and basement tectonic domains)and Unit VCentral Sichuan autochthonous uplift-basin area(controlled by basement tectonic domain). Sichuan Basin is one of major oil-gas-bearing basins in western China,with great natural gas exploration potential owing to abundant hydrocarbon supply and excellent preservation condition.Firstly,five sets of major source rocks developed during the multi-stage basin evolution,with a total thickness of up to 1 500~2 500 m,and high organic carbon content, hydrocarbon generation capacity and gas productivity.Secondly,the Lower Triassic gypsum-salt rocks played an important role in sealing marine oil and gas,while the binary texture and gentle erosion in thrust belt and adjacent foreland basin greatly enhanced the preservation condition in break basin-orogen structure areas.Further,uplift activities since the Late Cretaceous might cause not only the adjustment or destruction of ancient gas pools(gas storage center),but also the formation of present gas reservoirs(gas preservation centre),and fluid cross-formation migration and explosive gas accumulation as well.The multi-phased evolution of superimposed basin,composite-association of multi-stage and multi-direction structures,the heterogeneity of reservoirs and the mobility of natural gas decided the complexity,time-consuming and tortuosity of oil-gas exploration in Sichuan Basin.Thus,just a single exploration thinking,approach and hydrocarbon accumulation theory could not be employed to instruct oil-gas exploration;that is, exploration strategies should also be diverse.
引文
安风山.1997. 新场气田的发现及其对天然气勘探的启示.中国地质,24(10) :22-24. An Fengshan.1997. The discovery of Xinchang gas field and its implication for gas exploration.Geology in China,24(10) :22-24.
    车国琼,龚昌明,汪楠,宋红玲,李俊良2007. 广安地区须家河组气藏成藏条件.天然气工业,27(6) :1-5.Che Guoqiong,Gong Changming,Wang Nan,Song Hongling and Li Junliang.2007. Gas accumulation condition in the Xujiahe group of Guang'an area.Natural Gas Industry,27(6) :1-5.
    郭正吾,邓康龄,韩永辉.1996. 西川盆地形成与演化.北京:地质出版社.1-200. Guo Zhengwu,Deng Kangling and Han Yonghui.1996. The Formation and Evolution of Sichuan Basin.Beijing:Geological Publishing House.1-200.
    何登发,贾承造,童晓光,王桂宏.2004. 叠合盆地概念辨析.石油勘探与开发,31(1) :1-7. He Dengfa,Jia Chengzao,Tong Xiaoguang and Wang Guihong.2004. Discussion and analysis of superimposed sedimentary basins.Petroleum Exploration and Development,31(1) :1-7.
    黄籍中.1998. 四川盆地两类两套油系煤系烃源异同与大中型气田形成.大然气勘探与开发,21(4) :1-12. Huang Jizhong.1998. A discussion on the replaced tracts for natural gas exploration in Sichuan Basin.Natural Gas Industry,18(1) :13-17.
    金之钧,龙胜祥,周 雁,沃玉进,肖开华,杨志强,殷进垠2006. 中国南方膏盐岩分布特征.石油与天然气地质,27(5) :571-583. Jin Zhijun,Long Shengxiang,Zhou Yan,Wo Yujin,Xiao Kaihua,Yang Zhiqiang and Yin Jinyin.2006. A study on the distribution of saline-deposit in southern China.Oil & Gas Geology,27(5) :571-583.
    李建忠,董大忠,陈更生,王世谦,程克明.2009. 中国页岩气资源前景与战略地位.天然气工业,29(5) :11-16Li Jianzhong,Dong Dazhong,Chen Gengsheng,Wang Shiqian and Cheng Kerning.2009. Prospects and strategic position of shale gas resources in China.Natural Gas Industry,29(5) :11-16.
    李勇,曾允孚,伊海生.1995. 龙门山前陆盆地沉积及构造演化成都:成都科技大学出版社.1-92. Li Yong,Zeng Yunfu and Yi Haisheng.1995. Sedimentary and Tectonic Evolution of Longmengshan Foreland Basin,Western Sichuan China.Chengdu:Press of Chengdu University of Science and Technology.1-92.
    李智武,刘树根,林杰,汤聪,邓宾,孙玮.2009. 川西坳陷构造格局及其成因机制.成都理工大学学报(自然科学版),36(6) :645-653Li Zhiwu,Liu Shugen,Lin Jie,Tang Cong,Deng Bin and Sun Wei.2009. Structural configuration and its genetic mechanism of the west Sichuan depression in China.Journal of Chengdu University of Technology(Science & Technology Edition),36(6) :645-653.
    李智武,陈洪德,刘树根,侯明才,邓宾.2010龙门山冲断隆升及其走向差异的裂变径迹证据.地质科学,45(4) :944-968. Li Zhiwu,Chen Hongde,Liu Shugen,Hou Mingcai and Deng Bin.2010. Differential uplift driven by thrusting and its lateral variation along the Longmen Shan belt,western Sichuan,China:Evidence from fission track thermochronology.Chinese Journal of Geology,45(4) :944-968.
    刘树根.1993. 龙门山冲断带与川西前陆盆地的形成演化.成都:成都科技大学出版社.1-132. Liu Shugeng.1993. The Formation and Evolution of Longmengshan Thrust Zone and Western Sichuan Foreland Basin,Sichuan,China.Chengdu:Press of Chengdu University of Science and Technology.1-132.
    刘树根,罗志立,戴苏兰,Arne D,Wilson C J L.1995. 龙门山冲断带的隆升和川西前陆盆地的沉降.地质学报,69(3) :205-214. Liu Shugen,Luo Zhili,Dai Sulan,Arne D and Wilson C J L.1995. The uplift of the Longmenshan thrust belt and subsidence of the western Sichuan foreland basic.Acta Geologica Sinica,69(3) :205-214.
    刘树根,李国蓉,李巨初,徐国盛,王国芝,徐国强,孙玮,雍白权2005. 川西前陆盆地流体的跨层流动和天然气爆发式成藏.地质学报,79(5) :690-699. Liu Shugen,Li Guorong,Li Juchu,Xu Guosheng,Wang Guozhi,Xu Guoqiang,Sun Wei and Yong Ziquan.2005. Fluid cross formation flow and gas explosion accumulation in western Sichuan foreland basin,China.Acta Geologica Sinica,79(5) :690-699.
    刘树根,孙玮,李智武,邓宾,刘顺.2008a.四川盆地晚白垩世以来的构造隆升作用与天然气成藏.天然气地球科学,19(3) :293-300. Liu Shugen,Sun Wei,Li Zhiwu,Deng Bin and Liu Shun.2008a.Tectonic uplifting and gas pool formation since Late Cretaceous Epoch,Sichuan Basin.Natural Gas Geoscience,19(3) :293-300.
    刘树根,汪华,孙玮,代寒松,秦川.2008b.四川盆地海相领域油气地质条件专属性问题分析.石油与天然气地质,29(6) :781-792,818Liu Shugen,Wang Hua,Sun Wei,Dai Hansong and Qin Chuan.2008b.Analysis on special features of petroleum geological conditions of marine facies in Sichuan Basin.Oil & Gas Geology,29(6) :781-792,818.
    刘树根,李智武,曹俊兴,刘顺,邓宾,王国芝.2009a.龙门山陆内复合造山带的四维结构构造特征.地质科学,44(4) :1151-1180. Liu Shugen,Li Zhiwu,Cao Junxing,Liu Shun,Deng Bin and Wang Guozhi.2009a.4-D textural and structural characteristics of Longmen intracontinental composite orogenic belt,southwest China.Chinese Journal of Geology,44(4) :1151-1180.
    刘树根,马永生,蔡勋育,徐国盛,王国芝,雍自权,孙玮,袁海锋,盘昌林.2009b.四川盆地震旦系-下古生界天然气成藏过程和特征.成都理工大学学报(自然科学版),36(4) :345-354. Liu Shugen,Ma Yongsheng,Cai Xunyu,Xu Guosheng,Wang Guozhi,Yong Ziquan,Sun Wei,Yuan Haifeng and Pan Changlin.2009b.Characteristic and accumulation process of the natural gas from Sinian to Lower Paleozoic in Sichuan Basin,China.Journal of Chengdu University of Technology(Science & Technology Edition),36(4) :345-354.
    刘树根,曾祥亮,黄文明,马文辛2009c.四川盆地页岩气藏和连续-型非连续型气藏基本特征.成都理工大学学报(自然科学版),36(6) :578-592. Liu Shugen,Zeng Xiangliang,Huang Wenming and Ma Wenxin.2009c.Basic characteristics of shale and continuousdiscontinuous transition gas reservoirs in Sichuan Basin,China.Journal of Chengdu University of Technology(Science& Technology Edition),36(6) :578-592.
    罗志立,赵锡奎,刘树根,宋鸿彪.1994. 龙门山造山带的崛起和四川盆地的形成与演化.成都:成都科技大学出版社,1-564. Luo Zhili,Zhao Xikui,Liu Shugen and Song Hongbiao.1994. Uplift of Longmen Mountain Orogenic Belt and the Formation and Evolution of Sichuan Basin.Chengdu:Press of Chengdu University of Science and Technology.1-564.
    罗志立.1998. 四川盆地基底结构的新认识.成都理工大学学报(自然科学版),25(2) :191-200. Luo Zhili.1998. New recognition of basement in Sichuan Basin.Journal of Chengdu University of Technology(Science & Technology Edition),25(2) :191-200.
    马永生.2007. 四川盆地普光超大型气田的形成机制.石油学报,28(2) :9-14,21. Ma Yongsheng.2007. Generation mechanism of Puguang gas field in Sichuan Basin.Acta Petrolei Sinica,28(2) :9-14,21.
    孙玮,刘树根,马永生,蔡勋育,徐国盛,王国芝,雍自权,袁海锋,盘昌林2007. 四川盆地威远-资阳地区震旦系油裂解气判定及成藏过程定量模拟.地质学报,81(8) :1153-1159. Sun Wei,Liu Shugen,Ma Yongsheng,Cai Xunyu,Xu Guosheng,Wang Guozhi,Yong Ziquan,Yuan Haifeng and Pan Changlin.2007. Determination and quantitative simulation of gas pool formation process of Sinian cracked gas in Weiyuan-Ziyang area,Sichuan Basin.Acta Geologica Sinica,81(8) :1153-1159.
    童崇光.1992. 四川盆地构造演化与油气聚集.北京:地质出版社.1-128. Tong Chongguang.1992. Tectonic Evolution and Hydrocarbon Accumulation in Sichuan Basin.Beijing:Geological Publishing House.1-128.
    童崇光.2000新构造运动与四川盆地构造演化及气藏形成.成都理工大学学报(自然科学版),27(2) :123-130. Tong Chongguang.2000. Relationship between neotectonic movement and struclural evolution and gas pools formation of Sichuan Basin.Journal of Chengdu University of Technology(Science & Technology Edition),27(2) :123-130.
    王国芝,刘树根.2009海相碳酸盐岩区油气保存条件的古流体地球化学评价--以四川盆地中部下组合为例.成都理工大学学报(自然科学版),36(6) :631-644.Wang Guozhi and Liu Shugen.2009. Paleo-fluid geochemical evaluation of hydrocarbon preservation in marine carbonate rock areas:Taking lower association in central Sichuan Basin as an example.Journal of Chengdu University of Technology(Science & Technology Edition),36(6) :631-644.
    汪泽成,赵文智,张林,吴世祥.2002. 四川盆地构造层序与天然气勘探.北京:地质出版社.1-110Wang Zecheng,Zhao Wenzhi,Zhang Lin and Wu Shixiang.2002. Tectonic Sequence and Natural Gas Exploration in Sichuan Basin.Beijing:Geological Publishing House.1-110.
    王世谦,陈更生,黄先平2005. 四川盆地油气资源潜力及重点勘探领域.石油学报,26(增刊):97-101Wang Shiqian,Chen Gengsheng and Huang Xianping.2005. Petroleum resource potential and major exploration areas in Sichuan Basin.Acta Petrolei Sinica,26(suppl.):97-101.
    闫存章,黄玉珍,葛春梅,董大忠,程克明.2009页岩气是潜力巨大的非常规天然气资源.天然气工业,29(5) :1-6. Yan Cunzhang,Huang Yuzhen,Ge Chunmei,Dong Dazhong and Cheng Kerning.2009. Shale gas:Enormous potential of unconventional natural gas resources.Natural Gas Industry,29(5) :1-6.
    杨雨,王一刚,文应初,刘划一.2001. 川东飞仙关组沉积相与鲕滩气藏的分布天然气勘探与开发,24(3) :18-21 Yang Yu,Wang Yigang,Wen Yingchu and Liu Huayi.2001. Sedimentary facies and oolitic gas pools distribution in Feixianguan Formation of Early Triassic in eastern Sichuan Basin.Natural Gas Exploration and Development,24(3) :18-21.
    乐光禹,杜思清,黄继钧,杨武年.1996构造复合联合原理:川黔构造组合叠加分析.成都:成都科技大学出版社1-281. Yue Guangyu,Du Siqing,Huang Jijun and Yang Wunian.1996. Principle of Structural Compounding-Combine:Analysis of Structural Association-Superposition in Sichuan Basin and Guizhou Plateau,China.Chengdu; Press of Chengdu University of Science and Technology.1-281.
    Yue Guangyu,Du Siqing,Huang Jijun and Yang Wunian.1996. Principle of Structural Compounding-Combine:Analysis of Structural Association-Superposition in Sichuan Basin and Guizhou Plateau,China.Chengdu; Press of Chengdu University of Science and Technology.1-281.
    赵霞飞,吕宗刚,张闻林,彭海润,康仁东.2008. 四川盆地安岳地区须家河组--近海潮汐沉积.天然气工业,28(4) :14-18. Zhao Xiafei,Lii Zonggang,Zhang Wenlin,Peng Hairun and Kang Rendong.2008. Paralic tidal deposits in the Upper Triassic Xujiahe Formation in Anyue area,the Sichuan Basin.Natural Gas Industry,28(4) :14-18.
    Liu S G,Zhang Z J,Huang W M,Wang G Z,Sun W,Xu G S,Yuan H F,Zhang C J and Deng B.2010. Formation and destruction processes of Upper Sinian oil-gas pools in the Dingshan-Linlanchang structural bell,southeast Sichuan Basin,China.Petroleum Science,7(3) :289-301.
    Richardson N J,Densmore A L,Seward D,Wipf M,Li Y,Ellis M A and Zhang Y.2008. Extraordinary denudation in the Sichuan Basin:Insights from low-temperature thermochronology adjacent to the eastern margin of the Tibetan Plateau. Journal of Geophysical Research,113:B04409.
    Tian H,Xiao X,Wilkins R W T and Tang Y.2008. New insights inlo the volume and pressure changes during the thermal cracking of oil to gas in reservoirs:Implications for the in-situ accumulation of gas cracked from oils.AAPG Bulletin,92(2) :181-200.
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