石学文,杨雪,徐东来,杨雨然,袁东勋,马衍淳,王青,李润彤,张景缘,张赛柯,王玥,黄兴,牟林,郑全锋

• 1:中国石油西南油气田公司页岩气研究院
• 2:页岩气评价与开采四川省重点实验室
• 3:中国石油西南油气田公司页岩气研究院
• 4:山东省地质测绘院

摘要(Abstract)：

川东北二叠系大隆组是目前国家页岩气勘探的重要靶点。然而,诸多基础地层学问题给该领域的油气地质工作者带来争议和困惑。针对这些问题,我们对重庆梁平地区的DY1井和D201井的乐平统岩芯进行了系统的岩石地层学、牙形类生物地层学和无机碳同位素地层学研究。将两口井的乐平统划分为两组四段,包括吴家坪组的王坡页岩段和吴家坪灰岩段,以及大隆组的明月峡段和朝天段;在D201井乐平统取芯层段建立了4个牙形类化石带,自下而上依次为C.liangshanensis带、C.?transcaucasica带、C.wangi带和C.subcarinata带;构建了DY1井二叠系-三叠系界线附近高分辨率的无机碳同位素曲线。在此基础上,建立了重庆梁平地区乐平统综合地层框架,并论述了该区乐平世的沉积环境演变。重庆梁平地区乐平统综合地层框架的建立,对澄清和解决当前该区二叠系油气勘探所面临的基础地层学问题具有重要参考意义。

关键词(KeyWords)： 乐平统;岩石地层;牙形类;沉积环境;重庆;梁平

Abstract:

Keywords:

基金项目(Foundation): 中国石油股份公司攻关性应用性科技专项项目(2023ZZ21-04);; 中国石油西南油气田公司科研项目(20230304-08);; 国家自然科学基金(42372045);; 地质科学院项目(DD20221829)共同资助

作者(Author): 石学文,杨雪,徐东来,杨雨然,袁东勋,马衍淳,王青,李润彤,张景缘,张赛柯,王玥,黄兴,牟林,郑全锋

DOI: 10.19839/j.cnki.dcxzz.2025.0005

参考文献(References)：

• 辜学达,刘啸虎.1997.四川省岩石地层[M]武汉:中国地质大学出版社.
• 金玉玕,尚庆华,侯静鹏,李莉,王玉净,朱自立,费淑英.2000.中国地层典:二叠系[M].北京:地质出版社.
• 乐森璕.1929.广西北部之地质矿产[J].(前)两广地质调查所年报,2(下册):53-90..
• 沈树忠,张华,张以春,袁东勋,陈波,何卫红,牟林,林巍,王文倩,陈军,吴琼,曹长群,王玥,王向东.2019.中国二叠纪综合地层和时间框架[J].中国科学:地球科学,49(1):160-193.
• 汪凯明,何希鹏,许玉萍,金伟.2021.湘中坳陷涟源凹陷湘页1井大隆组页岩气地质特征[J].中国石油勘探,26(1):86-98.
• 王威,石文斌,付小平,陈超.2020.川北二叠系大隆组页岩气勘探潜力及方向[J].石油实验地质,42(6):892-899,956.
• 王秀平,牟传龙,肖朝晖,李红英,陈尧,郑斌嵩,王启宇.2019.湖北鹤峰地区二叠系大隆组页岩气储层特征及评价[J].海相油气地质,24(1):51-62.
• 肖明宏,朱传伟,张号,胡磊,吕星.2020.鄂西咸丰地区大隆组含页岩气地层潜力评价[J].资源环境与工程,34(S2):62-66.
• 谢通,潘诗洋,王亿,任志军,余江浩,段轲.2022.鄂西恩地1井上二叠统大隆组页岩气富集主控因素分析[J].资源环境与工程,36(2):149-153,197.
• 杨遵义,殷鸿福,吴顺宝,杨逢清,丁梅华,徐桂荣,等.1987.华南二叠-三叠系界线地层及动物群[M].北京:地质出版社.
• 赵金科,梁希洛,郑灼官.1978.华南晚二叠世头足类[M].北京:科学出版社.
• 赵宗举,周慧,陈轩,刘银河,张运波,刘玉娥,杨雨.2012.四川盆地及邻区二叠纪层序岩相古地理及有利勘探区带[J].石油学报,33(S2):35-51.
• 郑全锋.2006.浙江省长兴县煤山剖面二叠系-三叠系界线层序的沉积微相特征及层序地层划分[J].地层学杂志,30(4):373-383,395-396.
• Cao T T,Deng M,Song Z G,Luo H Y,Hursthouse A S.2018.Characteristics and controlling factors of pore structure of the Permian shale in southern Anhui province,East China[J].Journal of Natural Gas Science and Engineering,60:228-245.
• Chen Z Q,Yang H,Luo M,Benton M J,Kaiho K,Zhao L,Huang Y,Zhang K,Fang Y,Jiang H,Qiu H,Li Y,Tu C,Shi L,Zhang L,Feng X,Chen L.2015.Complete biotic and sedimentary records of the Permian-Triassic transition from Meishan section,South China:ecologically assessing mass extinction and its aftermath[J].Earth-Science Reviews,149:67-107.
• Isozaki Y,Yao J,Matsuda T,Sakai H,Ji Z,Shimizu N,Takano M,
• Kubo T.2004.Stratigraphy of the Middle-Upper Permian and Lowermost Trias sic at Chaotian,Sichuan,China:Record of Late Permian double mass extinction event[J].Proceedings of Japan Academy,80:10-16.
• Jin Y G,Wang Y,Wang W,Shang Q H,Cao C Q,Erwin D H.2000.Pattern of marine mass extinction near the Permian-Triassic boundary in South China[J].Science,289(5478):432-436.
• Korte C,Kozur H W.2010.Carbon-isotope stratigraphy across the Permian-Triassic boundary:a review[J].Journal of Asian Earth Sciences,39(4):215-235.
• Saltzman M R,Thomas E.2012.Carbon isotope stratigraphy[M]//Gradstein F M,Ogg J G,Schmitz M D,Ogg G M(Eds.).The Geologic Time Scale 2012.Amsterdam:Elsevier,207-232.
• Shen S Z,Cao C Q,Zhang H,Bowring S A,Henderson C M,Payne J L,Davydov V I,Chen B,Yuan D X,Zhang Y C,Wang W,Zheng Q F.2013.High-resolution δ~(13)C_(carb)chemo stratigraphy from latest Guadalupian through earliest Triassic in South China and Iran[J].Earth and Planetary Science Letters,375:156-165.
• Yin H F,Wu S B,Ding M H,Zhang K X,Tong J N,Yang F Q,Lai X L.1996.The Meishan section,candidate of the global stratotype section and point of Permian-Triassic boundary[M]//Yin H F(Ed.).The Palaeozoic-Mesozoic Boundary Candidates of Global Stratotype Section and Point of the Permian-Triassic Boundary.Wuhan:China University of Geosciences Press,31-45.
• Yuan D X,Shen S Z,Henderson C M,Chen J,Zhang H,Zheng Q F,Wu H C.2019.Integrative timescale for the Lopingian(Late Permian):a review and update from Shangsi,South China[J].Earth-Science Reviews,188:190-209.
• Zheng Q F,Cao C Q,Zhang M Y.2013.Sedimentary features of the Permian-Triassic boundary sequence of the Meishan section in Changxing County,Zhejiang Province[J].Science China:Earth Sciences,56(6):956-969.
• Zheng Q F,Zhang H,Yuan D X,Wang Y,Wang W Q,Cao C Q,Shen S Z.2022.High-resolution sedimentology,ichnology,and benthic marine redox conditions from Late Permian to the earliest Triassic at Shangsi,South China:Local,regional,and global signals and driving mechanisms[J].Earth-Science Reviews,225:103 898.