四川盆地东南缘向斜构造五峰组-龙马溪组常压页岩气富集主控因素
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摘要
四川盆地东南部地区盆缘槽档转换带和盆外隔槽式构造带向斜发育,由于其整体抬升时间长,构造运动强烈,剥蚀量大,区域保存条件相对复杂,导致不同向斜五峰组—龙马溪组为常压且页岩气含气性差异较大。在研究区向斜构造五峰组—龙马溪组页岩发育特征、后期保存条件、含气性等差异的基础上,分析了向斜构造页岩气富集主控因素,并总结了3种有利于页岩气保存富集的构造样式。研究结果表明:优质页岩发育是页岩含气性的物质基础,川东南地区盆缘和盆外向斜五峰组—龙马溪组优质页岩发育,页岩气物质条件相似;保存条件是影响页岩含气性差异的关键因素,页岩地层埋深大、地层倾角小、远离剥蚀区和发育反向逆断层,有利于页岩气的保存,总体上盆缘槽档转换带内向斜构造保存条件更好,盆外隔槽式构造带内向斜较差;盆缘槽档转换带复向斜构造内"洼中隆"断背斜、宽缓残留向斜中心、逆断层侧向遮挡向斜3种构造样式有利于页岩气的富集。
The synclines develop well in transferring belt from wide spaced synclines to anticlines at the edge of southeastern Sichuan Basin and in the belt of wide spaced synclines outside Sichuan Basin.Due to the uplifting for long time,serious structural movements and great amount of erosion,the regional preservation condition is complex,there exists great differences in gas contents in Wufeng-Longmaxi Formations in various anticlines.On the basis of studies on the features of shales from Wufeng-Longmaxi Formations,preservation conditions and gas contents in anticlines,the article analyzes the main controlling factors on shale gas enrichments in anticlines and makes a conclusion on structural patterns favorable for shale gas preservation and enrichments.The studies show that quality shales are the bases for shale gas,and the quality shales either at the edge of Sichuan Basin or out of Sichuan Basin have similar hydrocarbon rock conditions;preservation condition is the key for gas contents in shales,great depth of shale layers,small dip angle of strata,great distance away from eroded areas and developed over-thrusting faults are favorable for the preservation of shale gas.All in all,the preservation conditions of synclines in transferring belt from wide spaced synclines at the edge of Sichuan Basin are better than that of the belt of wide spaced synclines out of Sichuan Basin.Three kind of structural patterns as uplifts develop in synclines in transferring belt from wide spaced synclines to anticlines,the central part of wide gentle synclines and the synclines covered by over-thrusting faults are favorable for shale gas enrichments.
The synclines develop well in transferring belt from wide spaced synclines to anticlines at the edge of southeastern Sichuan Basin and in the belt of wide spaced synclines outside Sichuan Basin.Due to the uplifting for long time,serious structural movements and great amount of erosion,the regional preservation condition is complex,there exists great differences in gas contents in Wufeng-Longmaxi Formations in various anticlines.On the basis of studies on the features of shales from Wufeng-Longmaxi Formations,preservation conditions and gas contents in anticlines,the article analyzes the main controlling factors on shale gas enrichments in anticlines and makes a conclusion on structural patterns favorable for shale gas preservation and enrichments.The studies show that quality shales are the bases for shale gas,and the quality shales either at the edge of Sichuan Basin or out of Sichuan Basin have similar hydrocarbon rock conditions;preservation condition is the key for gas contents in shales,great depth of shale layers,small dip angle of strata,great distance away from eroded areas and developed over-thrusting faults are favorable for the preservation of shale gas.All in all,the preservation conditions of synclines in transferring belt from wide spaced synclines at the edge of Sichuan Basin are better than that of the belt of wide spaced synclines out of Sichuan Basin.Three kind of structural patterns as uplifts develop in synclines in transferring belt from wide spaced synclines to anticlines,the central part of wide gentle synclines and the synclines covered by over-thrusting faults are favorable for shale gas enrichments.
引文
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[14]Huang Jinliang,Zou Caineng,Li Jianzhong,et al.Shale gas generation and potential of the Lower Cambrian Qiongzhusi Formation in Southern Sichuan Basin,China[J].Petroleum Exploration and Development,2012,39(1):69-75.黄金亮,邹才能,李建忠,等.川南下寒武统筇竹寺组页岩气形成条件及资源潜力[J].石油勘探与开发,2012,39(1):69-75.
[15]Li Yanjun,Feng Yuanyuan,Liu Huan,et al.Geological characteristics and resource potential of lacustrine shale gas in the Sichuan Basin,SW China[J].Petroleum Exploration and Development,2013,40(4):423-428.李延钧,冯媛媛,刘欢,等.四川盆地湖相页岩气地质特征与资源潜力[J].石油勘探与开发,2013,40(4):423-428.
[16]Liang Chao,Jiang Zaixing,Yang Yiting,et al.Characteristics of shale lithofacies and reservoir space of the Wufeng-Longmaxi Formation,Sichuan Basin[J].Petroleum Exploration and Development,2012,39(6):691-698.梁超,姜在兴,杨镱婷,等.四川盆地五峰组-龙马溪组页岩岩相及储集空间特征[J].石油勘探与开发,2012,39(6):691-698.
[17]Wang Shejiao,Yang Tao,Zhang Guosheng,et al.Shale gas enrichment factors and the selection and evaluation of the core area[J].China Engineering Science,2012,14(6):94-100.王社教,杨涛,张国生,等.页岩气主要富集因素与核心区选择及评价[J].中国工程科学,2012,14(6):94-100.
[18]Long Pengyu,Zhang Jinchuan,Jiang Wenli,et al.Analysis on pores forming features and its influence factors of reservoir Well Yuye-1[J].Journal of Central South University:Science and Technology,2012,43(10):3954-3963.龙鹏宇,张金川,姜文利,等.渝页1井储层孔隙发育特征及其影响因素分析[J].中南大学学报:自然科学版,2012,43(10):3954-3963.
[19]Mei Lianfu,Liu Zhaoxi,Tang Ji,et al.Mesozoic intra-continental progressive deformation in western Hunan-Hubei-eastern Sichuan Provinces of China:Evidence from apatite fission track and balanced cross-section[J].Earth Science:Journal of China University of Geosciences,2010,35(2):161-174.梅廉夫,刘昭茜,汤济,等.湘鄂西-川东中生代陆内递进扩展变形:来自裂变径迹和平衡剖面的证据[J].地球科学:中国地质大学学报,2010,35(2):161-174.
[20]Yan Danping,Wang Xinwen,Liu Youyuan.Analysis of foldstyle and its formation mechanism in the area of boundary among Sichuan,Hubei and Hunan[J].Geoscience,2000,14(1):37-43.颜丹平,汪新文,刘友元.川鄂湘边区褶皱构造样式及其成因机制分析[J].现代地质,2000,14(1):37-43.
[21]Mu Chuanlong,Zhou Kenken,Liang Wei,et al.Early Paleozoic sedimentary environment of hydrocarbon source rocks in the Middle-Upper Yangtze region and petroleum and gas exploration[J].Acta Geologica Sinica,2011,85(4):526-532.牟传龙,周恳恳,梁薇,等.中上扬子地区早古生代烃源岩沉积环境与油气勘探[J].地质学报,2011,85(4):526-532.
[22]Chen Anding.Nitrogen as an index of oil-gas preservation conditions in marine strata[J].Petroleum Geology Experiment,2005,27(1):85-89.陈安定.氮气对海相地层油气保存的指示作用[J].石油实验地质,2005,27(1):85-89.
[23]He Xipeng,Gao Yuqiao,Tang Xianchun,et al.Analysis of major factors controlling the accumulation innormal pressure shale gas in the southeast of Chongqing[J].Natural Gas Geoscience,2017,28(4):654-663.何希鹏,高玉巧,唐显春,等.渝东南地区常压页岩气富集主控因素分析[J].天然气地球科学,2017,28(4):654-663.
[2]Wang Zhigang.Practice and cognition of shale gas horizontal well fracturing stimulation in Jiaoshiba of Fuling area[J].Oil&Gas Geology,2014,35(3):425-430.王志刚.涪陵礁石坝地区页岩气水平井压裂改造实践与认识[J].石油与天然气地质,2014,35(3):425-430.
[3]Zou Caineng,Yang Zhi,Zhu Rukai,et al.Progress in China,Sunconventional oil gas exploration and development and theoretical technologies[J].Acta Geologica Sinica,2015,89(6):979-1007.邹才能,杨智,朱如凯,等.中国非常规油气勘探开发与理论技术进展[J].地质学报,2015,89(6):979-1007.
[4]Wang Shize.The Tectonic Characteristics of Changing Area,South of Sichuan and Crack Characteristics of Longmaxi Formation of Silurian System[D].Chengdu:Chengdu University Technology,2014.王适择.川南长宁地区构造特征及志留系龙马溪组裂缝特征研究[D].成都:成都理工大学,2014.
[5]Wang Zhigang.Breakthrough of Fuling shale gas exploration and development and its inspiration[J].Oil&Gas Geology,2015,36(1):1-6.王志刚.涪陵页岩气勘探开发重大突破与启示[J].石油与天然气地质,2015,36(1):1-6.
[6]Guo Xusheng,Guo Tonglou,Wei Zhihong,et al.Thoughts on shale gas exploration in southern China[J].Engineering Sciences,2012,14(6):101-105.郭旭升,郭彤楼,魏志红,等.中国南方页岩气勘探评价的几点思考[J].中国工程科学,2012,14(6):101-105.
[7]Guo Xusheng.Southern marine shale gas“dual enrichment”law-the Sichuan Basin and the periphery of Longmaxi shale gas exploration in understanding[J].Acta Geologica Sinica.2014,88(7):1209-1218.郭旭升.南方海相页岩气“二元富集”规律-四川盆地及周缘龙马溪组页岩气勘探实践认识[J].地质学报,2014,88(7):1209-1218.
[8]Guo Tonglou,Zhang Hanrong.Formation and enrichment mode of Jiaoshiba shale gas field,Sichuan Basin[J].Petroleum Exploration and Development,2014,41(1):28-36.郭彤楼,张汉荣.四川盆地焦石坝页岩气田形成与富集高产模式[J].石油勘探与开发,2014,41(1):28-36.
[9]Guo Xusheng.Enrichment Mechanism and Exploration Technology of Jiaoshiba Area in Fuling Shale Gas Field[M].Beijing:Science Press,2014.郭旭升.涪陵页岩气田焦石坝区块富集机理与勘探技术[M].北京:科学出版社,2014.
[10]Hu Dongfeng,Zhang Hanrong,Ni Kai,et al.Main controlling factors for gas preservation conditions of marine shales in southeastern margins of the Sichuan Basin[J].Natural Gas Industry,2014,34(6):17-23.胡东风,张汉荣,倪楷,等.四川盆地东南缘海相页岩气保存条件及其主控因素[J].天然气工业,2014,34(6):17-23.
[11]Guo Tonglou,Liu Ruobing.Implication from marine shale gas exploration break-through in complicated structural area at high thermal stage:Taking Longmaxi Formation in Well JY1example[J].Natural Gas Geoscience,2013,24(4):643-651.郭彤楼,刘若冰.复杂构造区高演化程度海相页岩气勘探突破的启示---以四川盆地东部盆缘JY1井为例[J].天然气地球科学,2013,24(4):643-651.
[12]Ma Wenxin,Liu Shugen,Huang Wenming,et al.Reservoir rocks characters of Silurian and its unconventional gas prospection in western Hubei-eastern Chongqing[J].Journal of Southwest Petroleum University:Science&Technology E-dition,2012,34(6):27-37.马文辛,刘树根,黄文明,等.鄂西渝东志留系储层特征及非常规气勘探前景[J].西南石油大学学报:自然科学版,2012,34(6):27-37.
[13]Guo Yinghai,Li Zhuangfu,Li Dahua,et al.Lithofacies palaeogeography of the Early Silurian in Sichuan area[J].Journal of Palaeogeography,2004,6(1):20-29.郭英海,李壮福,李大华,等.四川地区早志留世岩相古地理[J].古地理学报,2004,6(1):20-29.
[14]Huang Jinliang,Zou Caineng,Li Jianzhong,et al.Shale gas generation and potential of the Lower Cambrian Qiongzhusi Formation in Southern Sichuan Basin,China[J].Petroleum Exploration and Development,2012,39(1):69-75.黄金亮,邹才能,李建忠,等.川南下寒武统筇竹寺组页岩气形成条件及资源潜力[J].石油勘探与开发,2012,39(1):69-75.
[15]Li Yanjun,Feng Yuanyuan,Liu Huan,et al.Geological characteristics and resource potential of lacustrine shale gas in the Sichuan Basin,SW China[J].Petroleum Exploration and Development,2013,40(4):423-428.李延钧,冯媛媛,刘欢,等.四川盆地湖相页岩气地质特征与资源潜力[J].石油勘探与开发,2013,40(4):423-428.
[16]Liang Chao,Jiang Zaixing,Yang Yiting,et al.Characteristics of shale lithofacies and reservoir space of the Wufeng-Longmaxi Formation,Sichuan Basin[J].Petroleum Exploration and Development,2012,39(6):691-698.梁超,姜在兴,杨镱婷,等.四川盆地五峰组-龙马溪组页岩岩相及储集空间特征[J].石油勘探与开发,2012,39(6):691-698.
[17]Wang Shejiao,Yang Tao,Zhang Guosheng,et al.Shale gas enrichment factors and the selection and evaluation of the core area[J].China Engineering Science,2012,14(6):94-100.王社教,杨涛,张国生,等.页岩气主要富集因素与核心区选择及评价[J].中国工程科学,2012,14(6):94-100.
[18]Long Pengyu,Zhang Jinchuan,Jiang Wenli,et al.Analysis on pores forming features and its influence factors of reservoir Well Yuye-1[J].Journal of Central South University:Science and Technology,2012,43(10):3954-3963.龙鹏宇,张金川,姜文利,等.渝页1井储层孔隙发育特征及其影响因素分析[J].中南大学学报:自然科学版,2012,43(10):3954-3963.
[19]Mei Lianfu,Liu Zhaoxi,Tang Ji,et al.Mesozoic intra-continental progressive deformation in western Hunan-Hubei-eastern Sichuan Provinces of China:Evidence from apatite fission track and balanced cross-section[J].Earth Science:Journal of China University of Geosciences,2010,35(2):161-174.梅廉夫,刘昭茜,汤济,等.湘鄂西-川东中生代陆内递进扩展变形:来自裂变径迹和平衡剖面的证据[J].地球科学:中国地质大学学报,2010,35(2):161-174.
[20]Yan Danping,Wang Xinwen,Liu Youyuan.Analysis of foldstyle and its formation mechanism in the area of boundary among Sichuan,Hubei and Hunan[J].Geoscience,2000,14(1):37-43.颜丹平,汪新文,刘友元.川鄂湘边区褶皱构造样式及其成因机制分析[J].现代地质,2000,14(1):37-43.
[21]Mu Chuanlong,Zhou Kenken,Liang Wei,et al.Early Paleozoic sedimentary environment of hydrocarbon source rocks in the Middle-Upper Yangtze region and petroleum and gas exploration[J].Acta Geologica Sinica,2011,85(4):526-532.牟传龙,周恳恳,梁薇,等.中上扬子地区早古生代烃源岩沉积环境与油气勘探[J].地质学报,2011,85(4):526-532.
[22]Chen Anding.Nitrogen as an index of oil-gas preservation conditions in marine strata[J].Petroleum Geology Experiment,2005,27(1):85-89.陈安定.氮气对海相地层油气保存的指示作用[J].石油实验地质,2005,27(1):85-89.
[23]He Xipeng,Gao Yuqiao,Tang Xianchun,et al.Analysis of major factors controlling the accumulation innormal pressure shale gas in the southeast of Chongqing[J].Natural Gas Geoscience,2017,28(4):654-663.何希鹏,高玉巧,唐显春,等.渝东南地区常压页岩气富集主控因素分析[J].天然气地球科学,2017,28(4):654-663.