Geological Conditions and Exploration Potential of Shale Gas in Dalong Formation in Northern Sichuan Basin

doi:10.11885/j.issn.1674-5086.2020.11.05.01

Abstract

Abstract: On the basis of the latest Well LB1 and 7 outcrops data and data of some old wells, the study evaluates the horizontal and vertical distribution law of high-quality shale of Dalong Formation in northern Sichuan Basin. It is considered that the distribution of high-quality shale is controlled by sedimentary facies and shows NW-SE trend. Basin facies have developed in Guangyuan-Wangcang Area with small shale thickness(10~20 m); deep-water shelf facies have developed on both sides of the basin facies, and the thickness of shale is relatively bigger(20~45 m); shallow-water shelf or slope facies have developed in the periphery, and the thickness of shale gradually becomes smaller(0~15 m). From slope facies to shelf facies, then to basin facies, the content of calcareous decreases and the content of silica increases gradually; the thickness of shale is bigger first (deep-water shelf facies) and then smaller (basin facies). In addition, the geochemical characteristics and reservoir microscopic characteristics of Well LB1 are studied, then compared with the Silurian shale fields in Jiaoshiba, Dingshan and Dongxi areas. It is concluded that the high quality shale of Dalong Formation has the characteristics of high organic carbon content, high gas content, good kerogen type, moderate maturity and good compressibility. It is considered that the extensive development of amorphous organic matter is the controlling factor of high organic carbon contentand the anoxic sulfide environment is the key to preservation. The characteristics of high gas content is due to a good correlation between gas content and the specific surface area, and the main contribution of the specific surface area is the content of organic matter. Finally, we have found that the resources of Dalong Formation in SINOPEC mining right have great exploration potential, which is worthy of further exploration.

Key words: Dalong Formation in northern Sichuan Basin, distribution law of shale, high organic matter content, high gas content, anoxic sulfide environment, specific surface area, exploration potential

CLC Number:

TE122

WANG Mingfa, WEN Hu, NI Kai, FU Xiaoping, YANG Hongfei. Geological Conditions and Exploration Potential of Shale Gas in Dalong Formation in Northern Sichuan Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(1): 13-23.

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References

[1] 王一刚,文应初,洪海涛,等. 四川盆地开江-梁平海槽内发现大隆组[J].天然气工业,2007,26(9):32-36. doi:10.3321/j.issn:1000-0976.2006.09.010 WANG Yigang, WEN Yingchu, HONG Haitao, et al. Dalong Formation found in Kaijing-Liangping ocenic trough in the Sichuan Basin[J]. Natural Gas Industry, 2007, 26(9):32-36. doi:10.3321/j.issn:1000-0976.2006.09.010
[2] 张毅.上扬子北缘晚二叠世大隆组有机质类型、分布规律及赋存控制因素[D]. 武汉:中国地质大学,2017. ZHANG Yi. Forms and distribution characteristics of organic matter and controlling factors on organic matter accumulation in the latest Permain Dalong Formation, nothern margin of Upper Yangtze[D]. Wuhan:China University of Geosciences, 2017.
[3] 李牛,胡超涌,马仲武,等. 四川广元上寺剖面上二叠统大隆组优质烃源岩发育主控因素初探[J].古地理学报,2011,13(3):347-353. doi:10.7605/gdlxb.2011.03.011 LI Niu, HU Chaoyong, MA Zhongwu, et al. Main control factors of high quality hydrocarbon source rocks of the Upper Permian Dalong Formation at Shangsi Section of Guangyuan, Sichuan Province[J]. Jouranl of Palaeogeography, 2011, 13(3):347-353. doi:10.7605/gdlxb.2011.03.011
[4] 陈斌,蔡雄飞,冯庆来,等. 四川广元长江沟大隆组的沉积特征及与烃源岩关系的研究[J]. 沉积与特提斯地质,2015,35(4):35-44. doi:10.3969/j.issn.1009-3850.2015.04.006 CHEN Bin, CAI Xiongfei, FENG Qinglai, et al. The Dalong Formation section in Changjianggou, Guangyuan, Sichuan:Sedimentary characteristics and their bearings on the source rocks[J]. Sedimentary Geology and Tethyan Geology, 2015, 35(4):35-44. doi:10.3969/j.issn.1009-3850.2015.04.006
[5] 李红敬,解习农,林正良,等. 四川盆地广元地区大隆组有机质富集规律[J]. 地质科技情报,2009,28(2):98-104. doi:10.3969/j.issn.1000-7849.2009.02.018 LI Hongjing, XIE Xinong, LIN Zhengliang, et al. Organic matter enrichment of Dalong Formation in Guangyuan Area of the Sichuan Basin[J]. Geological Science and Technology Information, 2009, 28(2):98-104. doi:10.3969/j.issn.1000-7849.2009.02.018
[6] 夏茂龙,文龙,王一刚,等. 四川盆地上二叠统海槽相大隆组优质烃源岩[J]. 石油勘探与开发,2010,37(6):0654-0663. XIA Maolong, WEN Long, WANG Yigang, et al. High-quality source rocks in trough facies of Upper Permian Dalong Formation of Sichuan Basin[J]. Petroleum Exploration and Development, 2010, 37(6):0654-0663.
[7] 朱洪发,秦德余,刘翠章. 论华南孤峰组和大隆组硅质岩成因、分布规律及其构造机制[J]. 石油实验地质,1989,11(4):341-348. doi:10.11781/sysydz198904341 ZHU Hongfa, QIN Deyu, LIU Cuizhang. On the origin distributive pattern and tectonic of siliceous rocks in Gufeng and Dalong[J]. Experimental Petroleum Geology, 1989, 11(4):341-348. doi:10.11781/sysydz198904341
[8] 余江浩,王登,王亿,等. 湖北西部上二叠统大隆组页岩气资源潜力评价[J].岩性油气藏,2018,30(4):84-90. doi:10.12108/yxyqc.20180409 YU Jianghao, WANG Deng, WANG Yi, et al. Evaluation of shale gas resource potential of Late Permian Dalong Formation in western Hubei Province[J]. Lithologic Reservoirs, 2018, 30(4):84-90. doi:10.12108/yxyqc.20180409
[9] 石刚,李建青,廖圣兵,等. 安徽宣城地区皖油地1井钻获二叠系页岩气[J].中国地质,2021,48(2):669-670. doi:10.12029/gc20210226 SHI Gang, LI Jianqing, LIAO Shengbing, et al. Discovery of Permian shell gas in the Well Wanyoudi No.1, Xuancheng, Anhui Province[J]. Geology in China, 2021, 48(2):669-670. doi:10.12029/gc20210226
[10] KUMP L R. Interpreting carbon-isotope excursions:Strangelove oceans[J]. Geology, 1991, 19(4):299-302. doi:10. 1130/0091-7613(1991)0192.3.CO;2
[11] 马永生,蔡勋育,赵培荣.元坝气田长兴组-飞仙关组礁滩相储层特征和形成机理[J].石油学报,2014,35(6):100-112. doi:10.7623/syxb201406001 MA Yongsheng, CAI Xunyu, ZHAO Peirong. Characteristics and formation mechanisms of reef-shoal carbonate reservoirs of Changxing-Feixianguan Formations, Yuanba Gas Field[J]. Acta Petrolei Sinica, 2014, 35(6):100-112. doi:10.7623/syxb201406001
[12] 腾格尔,秦建中,付小东,等.川西北地区海相油气成藏物质基础——优质烃源岩[J].石油实验地质,2008,30(5):478-483. doi:10.3969/j.issn.1001-6112.2008.05.010 TENGER, QIN Jianzhong, FU Xiaodong, et al. Basic conditions of marine hydrocarbon accumulation in northwest Sichuan Basin:High guality source rocks[J]. Experimental Petroleum Geology, 2008, 30(5):478-483. doi:10.3969/j.issn.1001-6112.2008.05.010
[13] 施振生,武瑾,董大忠,等.四川盆地五峰组-龙马溪组重点井含气页岩孔隙类型与孔径分布[J].地学前缘,2021,28(1):249-260. doi:10.13745/j.esf.sf.2020.5.23 SHI Zhensheng, WU Jin, DONG Dazhong, et al. Pore types and pore size distribution of typical wells of the Wufeng-Lungmachi shale in Sichuan Basin, China[J]. Geoscience Frontiers, 2021, 28(1):249-260. doi:10.13745/j.esf.sf.2020.5.23
[14] 郭旭升,胡东风,刘若冰,等.四川盆地二叠系海陆过渡相页岩气地质条件及勘探潜力[J].天然气工业,2018,38(10):11-18. doi:10.3787/j.issn.1000-0976.2018.10.002 GUO Xusheng, HU Dongfeng, LIU Ruobing, et al. Geological conditions and exploration potential of Permian marine-continent transitional facies shale gas in the Sichuan Basin[J]. Natural Gas Industry, 2018, 38(10):11-18. doi:10.3787/j.issn.1000-0976.2018.10.002
[15] 杨豫川.川西北上江沟地区大隆组硅质岩地化特征及其成因研究[D].成都:成都理工大学,2015. YANG Yuchuan. Research on geochemical characteristics and formative factors of cherts in the Dalong Formation of the Shangjiangou Area, northwestern Sichuan Basin[D]. Chengdu:Chengdu University of Technology, 2015.
[16] 杨遵仪,殷鸿福,吴顺宝,等.华南二叠三叠系界线地层及动物群[M].北京:地质出版社,1987. YANG Zunyi, YIN Hongfu, WU Shunbao, et al. Permian Triassic boundary strata and fauna in South China[M]. Beijing:Geological Publishing House, 1987.
[17] 蔡雄飞,冯庆来,顾松竹,等.海退型陆棚相:烃源岩形成的重要部位——以中、上扬子地区北缘上二叠统大隆组为例[J].石油与天然气地质,2011, 32(1):29-38. doi:10.11743/ogg20110104 CAI Xiongfei, FENG Qinglai, GU Songzhu, et al. Regressive continental shelf as an important location for the development of source rocks:An example from the Upper Pemian Dalong Formation in the northern margin of the upper-middle Yangtze Region[J]. Oil & Gas Geology, 2011, 32(1):29-38. doi:10.11743/ogg20110104
[18] 王秀平,牟传龙,肖朝晖,等.湖北鹤峰地区二叠系大隆组黑色岩系特征及成因初探[J]. 天然气地球科学,2018,29(3):382-396. doi:10.11764/j.issn.1672-1926.2018.01.006 WANG Xiuping, MOU Chuanlong, XIAO Zhaohui, et al. Characteristics and preliminary study on genesis of black rock series of Upper Permian Dalong Formation in Hefeng Area, Hubei Province[J]. Natural Gas Geoscience, 2018, 29(3):382-396. doi:10.11764/j.issn.1672-1926.2018.01.006
[19] 遇昊,陈代钊,韦恒叶,等.鄂西地区上二叠乐平统大隆组硅质岩成因及有机质富集机理[J].岩石学报,2012,28(3):1017-1027. YU Hao, CHEN Daizhao, WEI Hengye, et al. Origin of bedded chert and organic matter accumulation in the Dalong Formation of Upper Permian in western Hubei Province[J]. Acta Petrologica Sinica, 2012, 28(3):1017-1027.
[20] 刘惟庆.鄂西地区上二叠统大隆组富有机质页岩岩相与储层特征研究[D].武汉:中国地质大学,2019. LIU Weiqing. Study of the organic matter shales lithofacies and reservoir characteristics of the Upper Permian Dalong Formation in western Hubei[D]. Wuhan:China University of Geosciences, 2019.
[21] 饶丹,秦建中,腾格尔,等.川西北广元地区海相层系油苗和沥青来源分析[J].石油实验地质,2008,30(6):596-599. doi:10.3969/j.issn.1001-6112.2008.06.012 RAO Dan, QING Jianzhong, TENGER, et al. Source analysis of oil seepage and bitumen originating from marine layer strata in Guangyuan Area, the northwest Sichuan Basin[J]. Experimental Petroleum Geology, 2008, 30(6):596-599. doi:10.3969/j.issn.1001-6112.2008.06.012
[22] 遇昊,陈代钊,韦恒叶,等.二叠纪末期海洋缺氧:来自黄铁矿形态的证据[J].地质科学,2011,46(1):83-91. doi:10.3969/j.issn.0563-5020.2011.01.008 YU Hao, CHEN Daizhao, WEI Hengye, et al. Oceanic anoxia during the Late Permian:Evidence from pyrite morphology[J]. Chinese Journal of Geology, 2011, 46(1):83-91. doi:10.3969/j.issn.0563-5020.2011.01.008
[23] 张振国,霍少川,冷春鹏,等.地球圈层之间相互作用对白垩纪大洋缺氧与富氧过程的制约[J].中国地质,2017,44(4):707-721. doi:10.12029/gc20170405 ZHANG Zhenguo, HUO Shaochuan, LENG Chunpeng, et al. Interactions between the earth sphere and its constraint on the progress of anoxicoxic in the Cretaceous ocean[J]. Geology in China, 2017, 44(4):707-721. doi:10.12029/gc20170405
[24] 庞小婷,陈国辉,许晨曦,等.涪陵地区五峰组-龙马溪组页岩吸附-游离气定量评价及相互转化[J].石油实验地质,2019,40(6):1247-1259. doi:10.11743/ogg20190609 PANG Xiaoting, CHEN Guohui, XU Chenxi, et al. Quantitative evaluation of adsorbed and free gas and their mutual conversion in Wufeng-Longmaxi Shale, Fuling Area[J]. Petroleum Geology & Experimental, 2019, 40(6):1247-1259. doi:10.11743/ogg20190609
[25] 吉利明,邱军利,张同伟,等.泥页岩主要黏土矿物组分甲烷吸附实验[J].地球科学,2012,37(5):1043-1050. doi:10.3799/dqkx.2012.111 JI Liming, QIU Junli, ZHANG Tongwei, et al. Experiments on methane adsorption of common clay minerals in shale[J]. Earth Science, 2012, 37(5):1043-1050. doi:10.3799/dqkx.2012.111
[26] BUCHARDT B, LEWAN M D. Reflectance of vitrinite like marcerals as a thermal maturity index for Cambrian Ordovician Alum Shale, southern Scandinavia[J]. AAPG Bulletin, 1990, 74(4):394-406.
[27] 付小东,秦建中,腾格尔,等. 四川盆地北缘上二叠统大隆组烃源岩评价[J]. 石油实验地质,2010,32(6):566-517. doi:10.3969/j.issn.1001-6112.2010.06.009 FU Xiaodong, QIN Jianzhong, TENGER, et al. Evaluation on Dalong Formation source rock in the north Sichuan Basin[J]. Petroleum Geology & Experimental, 2010, 32(6):566-517. doi:10.3969/j.issn.1001-6112. 2010.06.009
[28] 陈瑞银,朱光有,周文宝,等. 川北地区大隆组烃源岩地球化学特征与生气潜力初探[J]. 天然气地球科学,2013,24(1):99-107. CHEN Ruiyin, ZHU Guangyou, ZHOU Wenbao, et al. Geochemical characteristics and hydrocarbon resource potential of Dalong Formation Permian, northeast Sichuan[J]. Natural Gas Geoscience, 2013, 24(1):99-107.
[29] 刘敏,卢双舫,薛海涛,等. 川东北地区上二叠统大隆组烃源岩生烃动力学应用[J]. 科学技术与工程,2011,11(17):3923-3929. doi:10.3969/j.issn.1671-1815.2011.17.015 LIU Min, LU Shuangfang, XUE Haitao, et al. Chemical kinetics application of hydrocarbon generation of Upper Permian Dalong Stratum in the northeastern Sichuan Basin[J]. Science Technology and Engineering, 2011, 11(17):3923-3929. doi:10.3969/j.issn.1671-1815.2011.17.015