涪陵焦石坝五峰组—龙马溪组页岩气富集主控因素分析
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摘要
在总结涪陵焦石坝页岩气田基本地质特征的基础上,对页岩气富集主控因素进行了分析。研究表明,五峰组—龙马溪组深水陆棚相优质页岩不仅有利于页岩气的生成,而且页岩的有机质丰度与含气量具有很好的正相关关系,为页岩气的富集提供了物质基础;页岩较高的有机质丰度和适中的热演化程度有利于有机质孔的发育,为页岩气的聚集提供了有利的储集空间;良好的顶底板条件和超压独立封存箱的形成,为页岩气富集提供了良好的保存条件,是页岩气富集高产的关键。
This paper presented the analysis on main factors controlling the shale gas enrichment based on the basic geological characteristics of the Jiaoshiba area in the Fuling shale gas field. It is indicated that high-quality shale of deep-water continental shelf facies in the Wufeng Formation–Longmaxi Formation is beneficial to the generation of shale gas. Besides, the organic matter abundance of shale is positively correlated with its gas content. Thus, it provides the material basis for the enrichment of shale gas. Higher organic matter abundance and moderate thermal evolution degree are favorable for the development of organic pores, providing the favorable reservoir space for the accumulation of shale gas. Good roof and floor conditions and the formation of over-pressure separate compartment provide good preservation conditions for shale gas enrichment, which serves as the key factor controlling the enrichment and high productivity of shale gas.
This paper presented the analysis on main factors controlling the shale gas enrichment based on the basic geological characteristics of the Jiaoshiba area in the Fuling shale gas field. It is indicated that high-quality shale of deep-water continental shelf facies in the Wufeng Formation–Longmaxi Formation is beneficial to the generation of shale gas. Besides, the organic matter abundance of shale is positively correlated with its gas content. Thus, it provides the material basis for the enrichment of shale gas. Higher organic matter abundance and moderate thermal evolution degree are favorable for the development of organic pores, providing the favorable reservoir space for the accumulation of shale gas. Good roof and floor conditions and the formation of over-pressure separate compartment provide good preservation conditions for shale gas enrichment, which serves as the key factor controlling the enrichment and high productivity of shale gas.
引文
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[8]尉鹏飞,张金川,隆帅,彭建龙,邓恩德,吕艳南,等.四川盆地及周缘地区龙马溪组页岩微观孔隙结构及其发育主控因素[J].中国石油勘探,2016,21(5):42-51.Wei Pengfei,Zhang Jinchuan,Long Shuai,Peng Jianlong,Deng Ende,Lu Yannan,et al.Characteristics and controlling factors of microscopic pore structure of Longmaxi Formation in Sichuan Basin and its periphery[J].China Petroleum Exploration,2016,21(5):42-51.
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[13]吴松涛,朱如凯,崔京钢,崔景伟,白斌,张响响,等.鄂尔多斯盆地长7湖相泥页岩孔隙演化特征[J].石油勘探与开发,2015,42(3):167-176.Wu Songtao,Zhu Rukai,Cui Jinggang,Cui Jingwei,Bai Bin,Zhang Xiangxiang,et al.Characteristics of lacustrine shale porosity evolution,Triassic Chang 7 Member,Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(3):167-176.
[14]Hunt J M.Generation and migration of petroleum from abnormally pressured fluid compartments[J].AAPG Bulletin,1990,74(1):1-12.
[15]李明诚,李剑,万玉金.盆地封隔体及其地质内涵[J].中国海上油气(地质),1999,13(6):396-400.Li Mingcheng,Li Jian,Wan Yujin.Basin compartment and its geological Connotaion[J].China Offshore Oil and Gas Geology,1999,13(6):396-400.
[16]查明,曲江秀,张为海.异常超压与油气成藏机理[J].石油勘探与开发,2002,29(1):19-23.Zha Ming,Qu Jiangxiu,Zhang Weihai.The relationship between overpressure and reservoir forming mechanism[J].Petroleum Exploration and Development,2002,29(1):19-23.
[17]姜涛,解习农.莺歌海盆地高温超压环境下储层物性影响因素[J].地球科学—中国地质大学学报,2005,30(2):215-220.Jiang Tao,Xie Xinong.Effects of high temperature and overpressure on reservoir quality in the Yinggehai Basin,South China Sea[J].Earth Science-Journal of China University of Geosciences,2005,30(2):215-220.
[18]李仲东,张哨楠,周文,惠宽洋,李良,过敏,等.大牛地气田上古生界压力封存箱与储层孔隙演化[J].矿物岩石,2007,27(3):73-80.Li Zhongdong,Zhang Shaonan,Zhou Wen,Hui Kuanyang,Li Liang,Guo Min,et al.Pressure compartment and evolution of reservoir porosity in the Upper Paleozoic of Daniudi gas field,Ordos Basin[J].Journal of Mineralogy and Petrology,2007,27(3):73-80.
[19]祝总祺,苗建宇,刘文荣,卢焕勇.论压力封存箱及其对次生孔隙的保护作用[J].西北大学学报:自然科学版,1997,27(1):73-78.Zhu Zongqi,Miao Jianyu,Liu Wenrong,Lu Huanyong.The Pressured fluid compartment and its preserving to secondary pores[J].Journal of Northwest University:Natural Science Edition,1997,27(1):73-78.
[20]高键,何生,易积正.焦石坝页岩气田中高密度甲烷包裹体的发现及其意义[J].石油与天然气地质,2015,36(3):472-480.Gao Jian,He Sheng,Yi Jizheng.Discovery of high density methane inclusions in Jiaoshiba shale gas field and its significance[J].Oil&Gas Geology,2015,36(3):472-480.
[2]韩克猷,查全衡,孙玮.扬子地台古生界页岩气资源及勘探前景[J].石油科技论坛,2016,35(2):37-45.Han Keyou,Zha Quanheng,Sun Wei.Exploration Prospect for Paleozoic shale gas resources of Yangtze platform[J].Oil Forum,2016,35(2):37-45.
[3]郭旭升,胡东风,魏志红,李宇平,魏祥峰.涪陵页岩气田的发现与勘探认识[J].中国石油勘探,2016,21(3):24-37.Guo Xusheng,Hu Dongfeng,Wei Zhihong,Li Yuping,Wei Xiangfeng.Discovery and exploration of Fuling shale gas field[J].China Petroleum Exploration,2016,21(3):24-37.
[4]梁狄刚,郭彤楼,陈建平,边立曾,赵喆,等.中国南方海相生烃成藏研究的若干新进展(二):南方四套区域性海相烃源岩的地球化学特征[J].海相油气地质,2009,14(1):1-15.Liang Digang,Guo Tonglou,Chen Jianping,Bian Lizeng,Zhao Zhe,et al.Some progresses on studies of hydrocarbon generation and accumulation in marine sedimentary regions,southern China(Part 2):geochemical characteristics of four suits of regional marine source rocks,south China[J].Marine Origin Petroleum Geology,2009,14(1):1-15.
[5]郑和荣,高波,彭勇民,聂海宽,杨斐然.中上扬子地区下志留统沉积演化与页岩气勘探方向[J].古地理学报,2013,15(5):645-656.Zheng Herong,Gao Bo,Peng Yongmin,Nie Haikuan,Yang Feiran.Sedimentary evolution and shale gas exploration direction[J].Journal of Palaeogeography,2013,15(5):645-656.
[6]Loucks R G,Reed R M,Ruppel S C.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
[7]王志刚,孙健.涪陵页岩气田试验井组开发实践与认识[M].北京:中国石化出版社,2014.Wang Zhigang,Sun Jiang.The result of development test well of Fuling shale gas field[M].Beijing:China Petrochemical Press,2014.
[8]尉鹏飞,张金川,隆帅,彭建龙,邓恩德,吕艳南,等.四川盆地及周缘地区龙马溪组页岩微观孔隙结构及其发育主控因素[J].中国石油勘探,2016,21(5):42-51.Wei Pengfei,Zhang Jinchuan,Long Shuai,Peng Jianlong,Deng Ende,Lu Yannan,et al.Characteristics and controlling factors of microscopic pore structure of Longmaxi Formation in Sichuan Basin and its periphery[J].China Petroleum Exploration,2016,21(5):42-51.
[9]要继超,王兴志,罗兰,胡曦,李可.渝东地区龙马溪组页岩气成藏地质条件研究[J].特种油气藏,2016,23(4):77-80.Yao Jichao,Wang Xingzhi,Luo Lan,Hu Xi,Li Ke.Geology of Longmaxi shale gas accumulation in eastern Chongqing[J].Special Oil&Gas Reservoirs,2016,23(4):77-80.
[10]Jarvie D M,Hill R J,Ruble T E.Unconventional shale gas systems:The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment[J].AAPG Bulletin,2007,91(4):475-799.
[11]Fishman N,Guthrie J,Honarpour M.The stratigraphic distribution of hydrocarbon storage and its effect on producible hydrocarbons in the Eagle Ford Formation[C].South Texas:Unconventional Resources Technology Conference,Denver,Colorado.2013,URTec 1579007,1540-1544.
[12]王飞宇,关晶,冯伟平,包林燕.过成熟海相页岩孔隙度演化特征和游离气量[J].石油勘探与开发,2013,40(6):764-768.Wang Feiyu,Guan Jing,Feng Weiping,Bao Linyan.Evolution of overmature marine shale porosity and implication to the free gas volume[J].Petroleum Exploration and Development,2013,40(6):764-768.
[13]吴松涛,朱如凯,崔京钢,崔景伟,白斌,张响响,等.鄂尔多斯盆地长7湖相泥页岩孔隙演化特征[J].石油勘探与开发,2015,42(3):167-176.Wu Songtao,Zhu Rukai,Cui Jinggang,Cui Jingwei,Bai Bin,Zhang Xiangxiang,et al.Characteristics of lacustrine shale porosity evolution,Triassic Chang 7 Member,Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(3):167-176.
[14]Hunt J M.Generation and migration of petroleum from abnormally pressured fluid compartments[J].AAPG Bulletin,1990,74(1):1-12.
[15]李明诚,李剑,万玉金.盆地封隔体及其地质内涵[J].中国海上油气(地质),1999,13(6):396-400.Li Mingcheng,Li Jian,Wan Yujin.Basin compartment and its geological Connotaion[J].China Offshore Oil and Gas Geology,1999,13(6):396-400.
[16]查明,曲江秀,张为海.异常超压与油气成藏机理[J].石油勘探与开发,2002,29(1):19-23.Zha Ming,Qu Jiangxiu,Zhang Weihai.The relationship between overpressure and reservoir forming mechanism[J].Petroleum Exploration and Development,2002,29(1):19-23.
[17]姜涛,解习农.莺歌海盆地高温超压环境下储层物性影响因素[J].地球科学—中国地质大学学报,2005,30(2):215-220.Jiang Tao,Xie Xinong.Effects of high temperature and overpressure on reservoir quality in the Yinggehai Basin,South China Sea[J].Earth Science-Journal of China University of Geosciences,2005,30(2):215-220.
[18]李仲东,张哨楠,周文,惠宽洋,李良,过敏,等.大牛地气田上古生界压力封存箱与储层孔隙演化[J].矿物岩石,2007,27(3):73-80.Li Zhongdong,Zhang Shaonan,Zhou Wen,Hui Kuanyang,Li Liang,Guo Min,et al.Pressure compartment and evolution of reservoir porosity in the Upper Paleozoic of Daniudi gas field,Ordos Basin[J].Journal of Mineralogy and Petrology,2007,27(3):73-80.
[19]祝总祺,苗建宇,刘文荣,卢焕勇.论压力封存箱及其对次生孔隙的保护作用[J].西北大学学报:自然科学版,1997,27(1):73-78.Zhu Zongqi,Miao Jianyu,Liu Wenrong,Lu Huanyong.The Pressured fluid compartment and its preserving to secondary pores[J].Journal of Northwest University:Natural Science Edition,1997,27(1):73-78.
[20]高键,何生,易积正.焦石坝页岩气田中高密度甲烷包裹体的发现及其意义[J].石油与天然气地质,2015,36(3):472-480.Gao Jian,He Sheng,Yi Jizheng.Discovery of high density methane inclusions in Jiaoshiba shale gas field and its significance[J].Oil&Gas Geology,2015,36(3):472-480.
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