Paleogeomorphology, sedimentary patterns and exploration of Deyang Anyue Rift Trough in Qiongzhusi Formation, Sichuan Basin

doi:10.3969/j.issn.1672-7703.2024.06.006

Abstract

Abstract: The shale gas within the Deyang-An’gue sag, specifically in the Qiongzhushi Formation, exhibits significant exploration potential. The characterization of the sag’s depositional features during the sedimentary period of the Qiongzhushi Formation has not been systematically understood. By establishing a sequence stratigraphy framework for the deposition of the Qiongzhushi Formation and analyzing sedimentary landforms based on shale thickness and quality, the geological significance of shale gas is elucidated. The results indicate that, considering sedimentary landforms, sedimentary facies, shale thickness, etc., the sedimentary period of the Qiong 1-2 sub-section can be divided into three landform units: intra-sag, slope, and extra-sag. Ancient landforms and source materials jointly control the shale thickness and quality. The intra-sag unit develops a siliceous mud-shale microfacies, with a shale reservoir thickness exceeding 20 m. The slope unit develops (including) sandy mud-shale microfacies, with a shale reservoir thickness of 5 to 20 m. The extra-sag unit develops muddy sandy-shale microfacies, with a shale reservoir thickness less than 5 m.

Key words: Sichuan Basin, Deyang-Anyue rift trough, Qiongzhusi Formation, Deep shale gas, Sedimentary microfacies

CLC Number:

TE122.1

Yang Yuran, Shi Xuewen, Li Yanyou, He Yifan, Zhu Yiqing, Zhang Ruhua, Xu Liang, Yang Xue, Yang Yiming, Zhang Yichi. Paleogeomorphology, sedimentary patterns and exploration of Deyang Anyue Rift Trough in Qiongzhusi Formation, Sichuan Basin[J]. China Petroleum Exploration, 2024, 29(6): 68-81.

References

[1]张道伟. 四川盆地未来十年天然气工业发展展望[J]. 天然气工业，2021，41(8)：34-45.
Zhang Daowei. Development prospect of natural gas industry in the Sichuan Basin in the next decade[J]. Natural Gas Industry，2021，41(8)：34-45.
[2]李剑，王晓波，侯连华等. 四川盆地页岩气地球化学特征及资源潜力[J]. 天然气地球科学， 2021， 32(08)：1093-1106.
Li Jian, Wang Xiaobo, Hou Lianhua et al. Geochemical characteristics and resource potential of shale gas in Sichuan Basin[J]. Natural Gas Geoscience, 2021, 32(8)：1093-1106.
[3]马新华，谢军，雍锐，等. 四川盆地南部龙马溪组页岩气储集层地质特征及高产控制因素[J]. 石油勘探与开发， 2020，47(5)：841-855.
Ma Xinhua, Xie Jun, Yong Rui et al. Geological characteristics and high production control factors of shale gas reservoirs in Silurian Longmaxi Formation, southern Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2020,47(5)：841-855.
[4]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(01)：69-75.
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(01)：69-75.
[5]邹才能，潘松圻，荆振华，等. 页岩油气革命及影响[J]. 石油学报，2020，41(1)：1-12.
Zou Caineng, Pan Songqi, Jing Zhenhua, et al. Shale oil and gas revolution and its impact[J]. Acta Petrolei Sinica, 2020, 41(1)：1-12.
[6]Li Nan. Prospect prediction for shale gas resources of the Lower Paleozoic in Sichuan Basin[J]. Lithologic Reservoirs, 2012,24(4)：70-63.
[7]Guo Chaohua， Li Qianyao， Wei Mingzhen. Pore structure characteristics of marine Silurian shales in the Sichuan Basin，China：insights to reserve assessment and production design[J]. Journal of Petroleum ence & Engineering，2018，164.
[8]梁峰，姜巍，戴赟，等. 四川盆地威远—资阳地区筇竹寺组页岩气富集规律及勘探开发潜力[J]. 天然气地球科学， 2022， 33(5)：755-763.
Liang Feng, Jiang Wei, Dai Yun, et al. Enrichment law and resource potential of shale gas of Qiongzhusi Formation in Weiyuan-Ziyang areas, Sichuan Basin[J]. Natural Gas Geoscience, 2022, 33(5)：755-763.
[9]郭彤楼，熊亮，叶素娟,等. 输导层（体）非常规天然气勘探理论与实践: 四川盆地新类型页岩气与致密砂岩气突破的启示[J]. 石油勘探与开发，2023，50(1)：24-37.
Guo Tonglou, Xiong Liang, Ye Sujuan, et al. Theory and practice of unconventional gas exploration in carrier beds： Insight from the breakthrough of new type of shale gas and tight gas in Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2023, 50(1)：24-37.
[10]付小东，陈娅娜，罗冰，等. 中上扬子区下寒武统麦地坪组—筇竹寺组烃源岩与含油气系统评价[J]. 中国石油勘探， 2022， 27(4)：103-120.
Fu Xiaodong, Chen Yana, Luo Bing, et al. Evaluation of source rocks and petroleum system of the Lower Cambrian Maidiping Formation-Qiongzhusi Formation in the Middle-Upper Yangtze region[J]. ]. China Petroleum Exploration, 2022, 27(4)：103-120.
[11]杨雨，汪华，谢继容，等. 页岩气勘探新领域：四川盆地开江—梁平海槽二叠系海相页岩气勘探突破及展望[J]. 天然气工业，2023，43(11)：19-27.
Yang Yu, Wang Hua, Xie Jirong, et al. Exploration breakthrough and prospect of Permian marine shale gas in the Kaijiang-Liangping Trough, Sichuan Basin[J]. Natural Gas Industry,2023, 43(11)： 19-27.
[12]Huang Jinlinag, Zou Caineng, Li Jianzhong, et al. Shale gas generation and potential of the Lower Cambrian Qiongzhusi Formation in the Southern Sichuan Basin, China[J]. Petroleum Exploration & Development, 2012, 39(1)：75-81.
[13]邱玉超，罗冰，夏茂龙，等. 四川盆地长宁地区震旦系—寒武系裂陷槽的发现及其地质意义[J]. 天然气勘探与开发， 2019， 42(2)：22-28.
Qiu Yuchao, Luo Bing, Xia Maolong, et al. Discovery and geological significance of Sinian-Cambrian rift trough, Changning area, Sichuan Basin[J]. Natural Gas Exploration and Development, 2019, 42(2)：22-28.
[14]马奎，文龙，张本健，等. 四川盆地德阳——安岳侵蚀裂陷槽分段性演化分析和油气勘探意义[J]. 石油勘探与开发， 2022， 49(2)：274-284.
Ma Kui, Wen Long, Zhang Benjian, et al. Segmented evolution of Deyang-Anyue erosion rift trough in Sichuan Basin and its significance for oil and gas exploration, SW China[J]. Petroleum Exploration and Development, 2022, 49(2)：274-284.
[15]陈更生，吴建发，刘勇，等. 川南地区百亿立方米页岩气产能建设地质工程一体化关键技术[J]. 天然气工业， 2021， 41(1)：72-82.
Chen Gengsheng, Wu Jianfa, Liu Yong, et al. Geology-engineering integration key technologies for ten billion cubic meters of shale gas productivity construction in the Southern Sichuan Basin[J]. Natural Gas Industry, 2021, 41(1)：72-82.
[16]刘瑞崟，周文，徐浩，等. 层序格架下构造—沉积分异对页岩气储层特征的控制: 以四川盆地西南部筇竹寺组为例[J]. 沉积学报，2023，41(5)：1478-1494.
Liu Ruiyun, Zhou Wen, Xu Hao, et al. Control of the Pattern of Tectonic-Depositional Differentiation on Shale Gas Reservoir Characteristics within a Sequence Stratigraphic Framework：a case study from the Qiongzhusi Formation in the Southwestern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2023, 41(5)：1478-1494.
[17]谢环羽，姜在兴，王培玺，等. 中—上扬子地区寒武系层序地层格架[J].石油学报，2021，42(7)：865-884.
Xie Huanyu, Jiang Zaixing, Wang Peixi, et al. Cambrian sequence stratigraphic framework in the Middle-Upper Yangtze area[J]. Acta Petrolei Sinica, 2021, 42(7)：865-884.
[18]刘忠宝，王鹏威，聂海宽，等. 中上扬子地区寒武系页岩气富集条件及有利区优选[J]. 中南大学学报( 自然科学版)，2022，53(9)：3694-3707.
Liu Zhongbao, Wang Pengwei, Nie Haikuan, et al. Enrichment conditions and favorable prospecting targets of Cambrian shale gas in Middle-Upper Yangtze[J]. Journal of Central South University (Science and Technology), 2022, 53(09)：3694-3707.
[19]杨雨，罗冰，张本健，等. 四川盆地下寒武统筇竹寺组烃源岩有机质差异富集机制与天然气勘探领域[J]. 石油实验地质，2021，43(4)：611-619.
Yang Yu, Luo Bing, Zhang Benjian, et al. Differential mechanisms of organic matter accumulation of source rocks in the Lower Cambrian Qiongzhusi Formation and implications for gas exploration fields in Sichuan Basin[J]. Petroleum Geology&Experiment, 2021, 43(04)：611-619.
[20]陈丽清，吴娟，何一凡,等. 四川盆地绵阳- 长宁拉张槽中段下寒武统筇竹寺组页岩裂缝脉体特征及古流体活动过程[J]. 地质科技通报，2023，42(3)：142-152.
Chen Li qing, Wu Juan, He Yifan, et al. Fractureve in characteristics and paleofluid activities in the Lower Cambrian Qiongzhusi shale in the central portion of the Mianyang-Changning intracratonic Sag, Sichuan Basin[J]. Bulletin of Geological Sciennce and Technology, 2023, 42(3)：142-152.
[21]赵建华，金之钧，林畅松,等. 上扬子地区下寒武统筇竹寺组页岩沉积环境[J]. 石油与天然气地质，2019，40(4)：701-715.
Zhao Jianhua, Jin Zhijun, Lin Changsong, et al. Sedimentary environment of the Lower Cambrian Qiongzhusi Formation shale in the Upper Yangtze region[J]. Oil & Gas Geology, 2019, 40(04)：701-715.
[22]周传明，张俊明，李国祥，等. 云南永善肖滩早寒武世早期碳氧同位素记录[J]. 地质科学， 1997， 32(02)：201-210.
Zhou Chuanming,Zhang Junming,Li Guoxiang, et al.Carbon and oxygen isotopinc record of the early Cambrian from the xiaotan section, Yunnan,south china[J]. Scientia Geologica Sinica, 1997,32(02)：201-210.
[23]Liu Zhongbao, Gao Bo, Zhang Yuying, et al. Types and distribution of the shale sedimentary facies of the Lower Cambrian in Upper Yangtze area, South China[J]. Petroleum Exploration and Development, 2017, 44(1)：21-31.
[24]袁钰轩，李一凡，樊太亮，等. 川西南地区下寒武统细粒沉积岩高精度层序地层特征及其充填演化模式[J/OL]. 地学前缘，1-19[2023-12-06].
Yuan Yuxuan, Li Yifan, Fan Tailiang, et al. High-resolution sequence stratigraphic characteristics and filling evolution model of Lower Cambrian fine-grained sedimentary rocks in southwestern Sichuan[J/OL]. Earth Science Frontiers,1-19[2023-12-06].
[25]刘树根，王一刚，孙玮，等. 拉张槽对四川盆地海相油气分布的控制作用[J].成都理工大学学报( 自然科学版)， 2016， 43(1)：1-23.
Liu Shugen, Wang Yigang, Sun Wei, et al. Control of intracratonic sags on the hydrocarbon accumulations in the marine strata across the Sichuan Basin, China[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2016, 43(1)：1-23.
[26]赵立可，李文皓，和源，等. 四川盆地麦地坪组—筇竹寺组沉积充填规律及勘探意义[J]. 天然气勘探与开发， 2020， 43(3)：30-38.
Zhao Like, Li Wenhao, He Yuan, et al. Sedimentation and filling laws of Maidiping-Qiongzhusi formations in Sichuan Basin and their significance of oil and gas geological exploration[J]. Natural Gas Exploration and Development, 2020, 43(3)：30-38.
[27]何骁，吴建发，雍锐，等. 四川盆地长宁—威远区块海相页岩气田成藏条件及勘探开发关键技术[J]. 石油学报，2021，42(2)：259-272.
He Xiao, Wu Jianfa, Yong Rui, et al. Accumulation conditions and key exploration and development technologies of marine shale gas field in Changning-Weiyuan block, Sichuan Basin[J]. Acta Petrolei Sinica, 2021, 42(2)：259-272.
[28]姜鹏飞，吴建发，朱逸青,等. 四川盆地海相页岩气富集条件及勘探开发有利区[J]. 石油学报， 2023， 44(01)：91-109.
Jiang Pengfei, Wu Jianfa, Zhu Yiqing, et al. Enrichment conditions and favorable areas for exploration and development of marine shale gas in Sichuan Basin[J]. Acta Petrolei Sinica, 2023,44(1)：91-109.
[29]张金川，李振，王东升,等. 中国页岩气成藏模式[J]. 天然气工业,2022,42(8)：78-95.
Zhang Jinchuan, Li Zhen, Wang Dongsheng, et al. Shale gas accumulation patterns in China[J]. Natural Gas Industry, 2022,42(8)：78-95.
[30]Zhang Kun, Song Yan, Jia, Chengzao, et al. Vertical sealing mechanism of shale and its roof and floor and effect on shale gas accumulation, a case study of marine shale in Sichuan Basin, the Upper Yangtze area[J]. Journal of Petroleum Science & Engineering, 2019, 175：743-754.