重庆下古生界页岩顺层滑脱变形域的形成及其地质意义

doi:10.11743/ogg20180203

Abstract

Abstract: The study presents the types,characteristics and the forming process of the bedding decollement deformation domain in the Lower Paleozoic shales in southeast Chongqing via mechanical analysis based on the observation of shale outcrops and cores,and discusses its geological significances in combination with shale gas exploration practices.Two types of bedding decollement deformation domains,namely compression-type and gravity-type,are recognized.The compression-type is formed when horizontal compressive tectonic stress dominates and shale layers are under the action of reverse fault;on the contrary,the gravity-type is formed when the overburden pressure dominates and the shale layers are under the action of normal fault.Compared with the gravity-type,the compression-type is more intense in stratum deformation with larger scale of influence on shales.Burial depth and dip angles are the key geological factors that control the formation of bedding decollement deformation domain in the same shale layer in a certain area.The critical dip angles for the compression-type expand gradually with the shale burial depth increasing,whereas that for the gravity-type decreases gradually with the increasing burial depth.The gravity-type is destructive to the preservation of shale gas.The bedding crushed zones and net fracture systems resulted by compression-type in an anticline are interpreted as the main migration pathways and reservoir space for shale gas,while those in an syncline are the main pathways for shale gas migrating to adjacent anticlines or releasing in the atmosphere.

Key words: bedding decollement deformation domain, formation mechanism, geological significance, Lower Paleozoic, shale, Chongqing

CLC Number:

P542.3

Yue Feng, Li Yongchen, Zhao Baoshan, Zeng Xiangliang. Bedding decollement deformation domain in the Lower Paleozoic shales in Chongqing:Formation and geological significance[J]. Oil & Gas Geology, 2018, 39(2): 229-238.

References

[1] 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. Guo Tonglou,Liu Ruobin.Implications from marine shale gas break-through in complicated structural area at high thermal stage:Taking Longmaxi Formation in well JY1 as an example[J].Natural Gas Geoscience,2013,24(4):643-651.
[2] 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. Guo Xusheng.Rules of two-factor enrichment for marine shale gas in southern China-Understanding from the Longmaxi Formation shale gas in Sichuan Basin and its surrounding area[J].Acta Geologica Sinica,2014,88(7):1209-1218.
[3] 孙健,罗兵.四川盆地涪陵页岩气田构造变形特征及对含气性的影响[J].石油与天然气地质,2016,37(6):809-819. Sun Jian,Luo Bing.Structural deformation and its influences on gas storage in Fuling shale gas play,the Sichuan Basin[J].Oil & Gas Geology,2016,37(6):809-819.
[4] 方志雄,何希鹏.渝东南武隆向斜常压页岩气形成与演化[J].石油与天然气地质,2016,37(6):819-827. Fang Zhixiong,He Xipeng.Formation and evolution of normal pressure shale gas reservoir in Wulong Syncline,Southeast Chongqing,China[J].Oil & Gas Geology,2016,37(6):819-827.
[5] 金之钧,胡宗全,高波,等.川东南地区五峰组-龙马溪组页岩气富集与高产控制因素[J].地学前缘,2016,23(1):1-10. Jin Zhijun,Hu Zongquan,Gao Bo,et al.Controlling factors on the enrichment and high productivity of shale gas in the Wufeng-Longmaxi Formations,southeastern Sichuan Basin[J].Earth Science Frontiers,2016,23(1):1-10.
[6] 丁文龙,李超,李春燕,等.页岩裂缝发育主控因素及其对含气性的影响[J].地学前缘,2012,19(2):212-220. Ding Wenlong,Li Chao,Li Chunyan,et al.Dominant factor of fracture development in shale and its relationship to gas accumulation[J].Earth Science Frontiers,2012,19(2):212-220.
[7] 郭彤楼.中国式页岩气关键地质问题与成藏富集主控因素[J].石油勘探与开发,2016,43(3):317-326. Guo Tonglou.Key geological issues and main controls on accumulation and enrichment of Chinese shale gas[J].Petroleum Exploration and Development,2016,43(3):317-326.
[8] 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+112. Guo Xusheng,Guo Tonglou,Wei Zhihong,et al.Thoughts on shale gas exploration in southern China[J].Engineering Sciences,2012,14(6):101-105+112.
[9] 聂海宽,包书景,高波,等.四川盆地及其周缘下件研究[J].地学前缘,2012,19(3):280-294. Nie Haikuang,Bao Shujing,Gao Bo,et al.A study of shale gas pre-servation conditions for the Lower Paleozoic in Sichuan Basin and its periphery[J].Earth Science Frontiers,2012,19(3):280-294.
[10] 张涛,尹宏伟,贾东,等.下扬子区构造变形特征与页岩气保存条件[J].煤炭学报,2013,38(5):883-889. Zhang Tao,Yin Hongwei,Jia Dong,et al.Structural deformation cha-racteristics and shale gas preservation of Lower Yangtze region[J].Journal of China Coal Society,2013,38(5):883-889.
[11] 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. Hu Dongfeng,Zhang Hanrong,Ni Kai,et al.Main controlling factors for gas preservation conditions of marine shale in southeastern margins of the Sichuan Basin[J].Natural Gas Industry,2014,34(6):17-23.
[12] 李海,白云山,王保忠,等.湘鄂西地区下古生界页岩气保存条件[J].油气地质与采收率,2014,21(6):22-25+112. Li Hai,Bai Yunshan,Wang Baozhong,et al.Preservation conditions research on shale gas in the lower Paleozoic of western Hunan and Hubei area[J].Petroleum Geology and Recovery Efficiency,2014,21(6):22-25+112.
[13] 马勇,钟宁宁,韩辉,等.糜棱化富有机质页岩孔隙结构特征及其含义[J].中国科学:地球科学,2014,44(10):2202-2209. Ma Yong,Zhong Ningning,Han Hui,et al.Definition and structure characteristics of pores in mylonitized organic-rich shales[J].Science China:Earth Sciences,2014,44(10):2202-2209.
[14] 潘仁芳,唐小玲,孟江辉,等.桂中坳陷上古生界页岩气保存条件[J].石油与天然气地质,2014,35(4):534-541. Pan Renfang,Tang Xiaoling,Meng Jianghui,et al.Shale gas preservation conditions for the upper Paleozoic in Guizhoug depression[J].Oil & Gas Geology,2014,35(4):534-541.
[15] 汤济广,李豫,汪凯明,等.四川盆地东南地区龙马溪组页岩气有效保存区综合评价[J].天然气工业,2015,35(5):15-23. Tang Jiguang,Li Yu,Wang Kaiming,et al.Comprehensive evaluation of effective preservation zone of Longmaxi Formation shale gas in the southeast Sichuan Basin[J].Natural Gas Industry,2015,35(5):15-23.
[16] 徐政语,姚根顺,梁兴,等.扬子陆块下古生界页岩气保存条件分析[J].石油实验地质,2015,37(4):407-417. Xu Zhengyu,Yao Genshun,Liang Xing,et al.Shale gas preservation conditions in the Lower Paleozoic,Yangtze block[J].Petroleum Geology & Experiment,2015,37(4):407-417.
[17] 于俊友,雍自权,程凌云,等.强改造区龙马溪组页岩气保存条件指数评价[J].长江大学学报(自科版),2015,12(35):1-7. Yu Junyou,Yong Ziquan,Cheng Lingyun,et al.Index evaluation of shale gas preservation conditions of Longmaxi Formation in strong reconstruction zone[J].Journal of Yangtze University(Natural Science Edition),2015,12(35):1-7.
[18] 何治亮,聂海宽,张钰莹.四川盆地及其周缘奥陶系五峰组-志留系龙马溪组页岩气富集主控因素分析[J].地学前缘,2016,23(2):8-17. He Zhiliang,Nie Haikuang,Zhang Yuying.The main factors of shale gas enrichment of Ordovician Wufeng Formation-Silurian Longmaxi Formation in the Sichuan Basin and its adjacent areas[J].Earth Science Frontiers,2016,23(2):8-17.
[19] 刘树根,邓宾,钟勇,等.四川盆地及周缘下古生界页岩气深埋藏-强改造独特地质作用[J].地学前缘,2016,23(1):11-28. Liu Shugen,Deng Bin,Zhong Yong,et al.Unique geological features of burial and superimposition of the Lower Paleozoic shale gas across the Sichuan Basin and its periphery[J].Earth Science Frontiers,2016,23(1):11-28.
[20] 王濡岳,丁文龙,龚大建,等.黔北地区海相页岩气保存条件——以贵州岑巩区块下寒武统牛蹄塘组为例[J].石油与天然气地质,2016,37(1):45-55. Wang Ruyue,Ding Wenlong,Gong Dajian,et al.Gas preservation conditons of marine shale in northern Guizhou area:A case study of the Lower Cambrian Niutitang Formation in the Cen'gong block,Guizhou Province[J].Oil & Gas Geology,2016,37(1):45-55.
[21] 张健,刘树根,冉波,等.异常高压与页岩气保存[J].成都理工大学学报(自然科学版),2016,43(2):177-187. Zhang Jian,LiuShugen,Ran Bo,et al.Abnormal overpressure and shale gas preservation[J].Journal of Chengdu University of Techno-logy(Science & Technology Editon),2016,43(2):177-187.
[22] 曾联波,肖淑蓉.低渗透储集层中的泥岩裂缝储集体[J].石油实验地质,1999,21(3):266-269. Zeng Lianbo,Xiao Shurong.Fractures in the mudstone of tight reservoirs[J].Experimental Petroleum Geology,1999,21(3):266-269.
[23] 曾联波,漆家福,王永秀.低渗透储层构造裂缝的成因类型及其形成地质条件[J].石油学报,2007,28(4):52-56. Zeng Lianbo,Qi Jiafu,Wang Yongxiu.Origin types of tectonic fractures and geological conditions in low-permeability reservoirs[J].Acta Petrolei Sinica,2007,28(4):52-56.
[24] 龙鹏宇,张金川,唐玄,等.泥页岩裂缝发育特征及其对页岩气勘探和开发的影响[J].天然气地球科学,2011,22(3):525-532. Long Pengyu,Zhang Jinchuan,Tang Xuan,et al.Feature of muddy shale fissure and its effect for shale gas exploration and development[J].Natural Gas Geoscience,2011,22(3):525-532.
[25] 刘平,陈书平,刘世丽,等.苏北盆地阜宁组泥页岩裂缝类型及形成期次[J].西安石油大学学报(自然科学版),2014,29(6):13-20. Liu Ping,Chen Shuping,Liu Shili,et al.Types and forming epochs of the fractures in the shale of Funing Formation of Subei Basin[J].Journal of Xi'an Shiyou University(Natural Science Edition),2014,29(6):13-20.
[26] 周雁,袁玉松,邱登峰.泥页岩构造裂缝形成演化模式——以四川盆地东部泥页岩为例[J].石油与天然气地质,2015,36(5):828-834. Zhou Yan,YuanYusong,Qiu Dengfeng.A discussion on formation and evolutionary pattern of shale structural fracture:A case study of shale gas in western Sichuan Basin[J].Oil & Gas Geology,2015,36(5):828-834.
[27] 胡望水,李涛,于水,等.西非被动大陆边缘重力滑脱构造发育演化及成因机制[J].大地构造与成矿学,2012,36(2):186-196. Hu Wangshui,Li Tao,Yu Shui,et al.Tectonic revolution and forming mechanism of gravitational decollement structures in the passive continental margin of west Africa.[J].Geotectonica et Metallogenia,2012,36(2):186-196.
[28] 李涛,胡望水,于水,等.西非被动大陆边缘重力滑脱构造体系下的塑性构造[J].海洋地质与第四纪地质,2016,32(4):31-36. Li Tao,Hu Wangshui,Yu Shui,et al.Ductile structures in gravitational decollement structure system at passive continental margin of west African[J].Marine Geology & Quaternary Geology,2016,32(4):31-36.
[29] 白博,康洪全,程涛,等.巴西东北部海域盆地重力滑脱构造体系特征[J].海洋地质前沿,2016,32(4):31-36. Bai Bo,Kang Hongquan,Cheng Tao,et al.Gravity decollement structural system in offshore basins of northeast Brazil[J].Marine Geology Frontiers,2016,32(4):31-36.
[30] 岳锋,焦伟伟,郭淑军.渝东南牛蹄塘组页岩裂缝及其分布控制因素[J].煤田地质与勘探,2015,43(6):39-44. Yue Feng,Jiao Weiwei,Guo Shujun.Controlling factors of fracture distribution of shale in Lower Cambiran Niutitang Formation in southeast Chongqing[J].Coal Geology & Exploration,2015,43(6):39-44.
[31] 高磊,明君,闫涛,等.地震属性综合分析技术在泥岩隔夹层识别中的应用[J].岩性油气藏,2013,25(4):101-105. Gao Lei,Ming Jun,Yan Tao,et al.Application of seismic attribute analysis technique to the identification of mudstoneinterbeds[J].Lithologic Reservoirs,2013,25(4):101-105.
[32] 丁世梅,季民,史洁,等.泥岩隔夹层类型及剩余油控制研究[J].江汉石油学院学报,2004,26(4):130-131+144. Ding Shimei,Ji Min,Shi Jie,et al.Types of mudstone barriers and its residual oil control[J].Journal of Jianghan Petroleum Institute,2004,26(4):130-131+144.

Bedding decollement deformation domain in the Lower Paleozoic shales in Chongqing:Formation and geological significance

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