Exploration breakthrough and geological significance of continental deep shale gas in Well Fengyun 1 in Mahu Sag

doi:10.3969/j.issn.1672-7703.2024.01.008

Abstract

Abstract: The Permian Fengcheng Formation is the main source rock and exploration target in Mahu Sag, and the identification of shale oil and gas potential in deep formations has important guiding significance for further exploration activities. Based on shale gas discoveries in Fengcheng Formation in Well Fengyun 1 and exploration achievements in the underlying pre-Fengcheng Formation, the lithologic characteristics, hydrocarbon generation conditions of source rock, and reservoir conditions in Well Fengyun 1 have systematically been analyzed, and the distribution sequence of shale oil and gas in Fengcheng Formation in Mahu Sag has been determined, showing great geological significance. The study results show that Fengcheng Formation in Well Fengyun 1 is mainly composed of salt rock, shale, and silty-fine sandstone; Fengcheng Formation source rock has a relatively low organic matter abundance, and that in the first member has the best quality, with an average TOC of 1.06%; The reservoir is generally tight with an average porosity of 4.65%, and the dolomitic shale and limy sandstone have relatively better physical properties. With the increasing depth, a complete hydrocarbon distribution pattern from shale oil, to shale oil and gas, and to shale gas occurs in Fengcheng Formation in Mahu Sag. In addition, pre-Fengcheng Formation shows good resource potential with hydrocarbon source supplied by the ultra-deep oil and gas system, which is a major field for further exploration.

CLC Number:

TE111.1

Tang Yong, Bai Yu, Gao Gang, He Wenjun, You Xincai, Dang Wenlong, Zhang Lei, Jiao Xiaobing, Li Mengyao, Yan Qi, Yu Xing. Exploration breakthrough and geological significance of continental deep shale gas in Well Fengyun 1 in Mahu Sag[J]. China Petroleum Exploration, 2024, 29(1): 106-118.

References

[1] 支东明，曹剑，向宝力，等.玛湖凹陷风城组碱湖烃源岩生烃机理及资源量新认识[J].新疆石油地质，2016,37(5):499-506.
Zhi Dongming, Cao Jian, Xiang Baoli, et al. Fengcheng alkaline lacustrine source rocks of Lower Permian in Mahu Sag in Junggar Basin: hydrocarbon generation mechanism and petroleum resources reestimation[J]. Xinjiang Petroleum Geology, 2016,37(5):499-506.
[2] 王小军，王婷婷，曹剑.玛湖凹陷风城组碱湖烃源岩基本特征及其高效生烃[J].新疆石油地质，2018,39(1):9-15.
Wang Xiaojun, Wang Tingting, Cao Jian, et al. Basic Characteristics and highly efficient hydrocarbon generation of alkaline lacustrine source rocks in Fengcheng Formation of Mahu Sag[J]. Xinjiang Petroleum Geology, 2018, 39(1): 9-15.
[3] 唐勇，郭文建，王霞田，等.玛湖凹陷砾岩大油区勘探新突破及启示[J].新疆石油地质，2019,40(2):127-137.
Tang Yong, Guo Wenjian, Wang Xiatian, et al. A new breakthrough in exploration of large conglomerate oil province in Mahu Sag and its implications[J]. Xinjiang Petroleum Geology, 2019,40(2):127-137.
[4] 唐勇，曹剑，何文军，等.从玛湖大油区发现看全油气系统地质理论发展趋势田[J].新疆石油地质，2021,42(1):1-9.
Tang Yong, Cao Jian, He Wenjun, et al. Development tendency of geological theory of total petroleum system: insights from the discovery of Mahu large oil province[J]. Xinjiang Petroleum Geology, 2021,42(1):1-9.
[5] 何文军，钱永新，赵毅，等.玛湖凹陷风城组全油气系统勘探启示[J].新疆石油地质，2021,42(6):641-655.
He Wenjun, Qian Yongxin, Zhao Yi, et al. Exploration implications of total petroleum system in Fengcheng Formation, Mahu Sag, Junggar Basin[J]. Xinjiang Petroleum Geology, 2021,42(6):641-655.
[6] 王江涛，杨森，邹阳，等.玛北地区二叠系风城组一段优质储层特征、成因及分布[J].中国石油勘探，2022,27(3):99-109.
Wang Jiangtao, Yang Sen, Zou Yang, et al. Characteristics, genesis and distribution of high-quality reservoir of the first member of the Permian Fengcheng Formation in Mabei area, Junggar Basin[J]. China Petroleum Exploration, 2022,27(3): 99-109.
[7] 宋永，杨智峰，何文军，等.准噶尔盆地玛湖凹陷二叠系风城组碱湖型页岩油勘探进展[J].中国石油勘探，2022,27(1):60-72.
Song Yong, Yang Zhifeng, He Wenjun, et al. Exploration progress of alkaline lake type shale oil of the Permian Fengcheng Formation in Mahu Sag, Junggar Basin[J]. China Petroleum Exploration, 2022,27(1):60-72.
[8] 王绪龙，康素芳.准噶尔盆地腹部及西北缘斜坡区原油成因分析[J].新疆石油地质，1999,20(2):108-104.
Wang Xulong, Kang Sufang. Analysis of crude oil origin and slope of northwestern margin, Junggar Basin[J]. Xinjiang Petroleum Geology, 1999,20(2):108-104.
[9] 曹剑，雷德文，李玉文，等.古老碱湖优质烃源岩：准噶尔盆地下二叠统风城组[J].石油学报，2015,36(7):781-790.
Cao Jian, Lei Dewen, Li Yuwen, et al. Ancient high-quality alkaline lacustrine source rocks discovered in the Lower Permain Fengcheng Formation, Junggar Basin[J]. Acta Petrolei Sinica, 2015,36(7):781-790.
[10] 支东明，宋永，何文军，等.准噶尔盆地中一下二叠统页岩油地质特征、资源潜力及勘探方向[J].新疆石油地质，2019,40(4):389-401.
Zhi Dongming, Song Yong, He Wenjun, et al. Geological characteristics, resource potential and exploration direction of shale oil in Middle-Lower Permian, Junggar Basin[J]. Xinjiang Petroleum Geology, 2019,40(4):389-401.
[11] 何文军，王绪龙，邹阳，等.准噶尔盆地石油地质条件、资源潜力及勘探方向[J].海相油气地质，2019,24(2):75-84.
He Wenjun, Wang Xulong, Zou Yang, et al. The geological conditions, resource potential and exploration direction of oil in Junggar Basin[J]. Marine Origin Petroleum Geology, 2019,24(2): 75-84.
[12] 刘诗局，高岗，靳军，等.咸化湖相富含层状藻与结构藻烃源岩的成烃特征新探与意义[J].地质学报，2023,97(3):879-887.
Liu Shiju, Gao Gang, Jin Jun, et al. Significance of hydrocarbon generation characteristics of source rock samples dominated by telalginite and lamalginite in saline lacustrine sediments[J]. Acta Geologica Sinica, 2023,97(3):879-887.
[13] 薛晶晶，白雨，李鹏，等.准噶尔盆地玛南地区二叠系致密砾岩储层特征及形成有利条件[J].中国石油勘探，2023,28(5):99-108.
Xue Jingjing, Bai Yu, Li Peng, et al. Characteristics and favorable conditions for the formation of the Permian tight conglomerate reservoir in Manan area, Junggar Basin[J]. China Petroleum Exploration, 2023,28(5):99-108.
[14] 秦勇，李保柱，胡水清，等.玛湖凹陷致密砾岩油藏四维地应力场模拟研究与应用[J].石油科技论坛，2022,41(2):23-31.
Qin Yong, Li Baozhu, Hu Shuiqing, et al. Numerical simulation of four-dimensional stress field for tight glutenite reservoir in Mahu Sag, Junggar Basin[J]. Petroleum Science and Technology Forum, 2022,41(2):23-31.
[15] 支东明，唐勇，何文军，等.准噶尔盆地玛湖凹陷风城组常规—非常规油气有序共生与全油气系统成藏模式[J].石油勘探与开发，2021, 48(1):38-51.
Zhi Dongming, Tang Yong, He Wenjun, et al. Orderly coexistence and accumulation models of conventional and unconventional hydrocarbons in Lower Permian Fengcheng Formation, Mahu Sag, Junggar Basin[J]. Petroleum Exploration and Development, 2021,48(1):38-51.
[16] 唐勇，雷德文，曹剑，等.准噶尔盆地二叠系全油气系统与源内天然气勘探新领域[J].新疆石油地质，2022,13(6):654-663.
Tang Yong, Lei Dewen, Cao Jian, et al. Total petroleum system and inner source natural gas exploration in Permian Strata of Junggar Basin[J]. Xinjiang Petroleum Geology, 2022,13(6): 654-663.
[17] 高岗，王绪龙，柳广弟，等.准噶尔盆地西北缘克百地区天然气成因与潜力分析[J].高校地质学报，2012,18(2):307-317.
Gao Gang, Wang Xulong, Liu Guangdi, et al. Analyses of the genesis and potential of natural gas in Kebai Area of Northwest Margin, Jungar Basin[J]. Geological Jouranl of China Universities, 2012,18(2): 307-317.
[18] 高岗，向宝力，任江玲，等.准噶尔盆地玛湖凹陷北部—乌夏断裂带天然气成因与来源[J].天然气地球科学，2016, 27(4): 672-680.
Gao Gang, Xiang Baoli, Ren Jiangling, et al. Origin and source of natural gas from Wuxia fault belt in the northern Mahu Sag, Junggar Basin[J]. Natural Gas Geoscience, 2016, 27(4):672-680.
[19] 倪敏婕，祝贺暄，何文军，等.准噶尔盆地玛湖凹陷风城组沉积环境与沉积模式分析[J].现代地质，2023,37(5):1194-1207.
Ni Minjie, Zhu Hexuan, He Wenjun, et al. Depositional environment and sedimentary model of the Fengcheng Formation in Mahu Sag, Junggar Basin[J]. Geoscience, 2023,37(5):1194-1207.
[20] 秦志军，陈丽华，李玉文，等.准噶尔盆地玛湖凹陷下二叠统风城组碱湖古沉积背景[J].新疆石油地质，2016,37(1):1-6.
Qin Zhijun, Chen Lihua, Li Yuwen, et al. Paleo-sedimentary setting of the Lower Permain Fengcheng alkali lake in Mahu Sag, Junggar Basin[J]. Xinjiang Petroleum Geology, 2016,37(1):1-6.
[21] 张磊，张昌民，赵康，等.玛湖凹陷二叠系—三叠系沉积模式与分支河流体系演变[J].石油地质与工程，2023,37(4):1-10.
Zhang Lei, Zhang Changmin, Zhao Kang, et al. Permian Trassic sedimentary model and distributive fluvial system evolution of Mahu Sag, Junggar Basin[J]. Petroleum Geology & Engineering, 2023,37(4):1-10.
[22] 张关龙，王越.准噶尔盆地早二叠世构造—沉积格局及石油地质意义[J].油气地质与采收率，2023,30(1):35-48.
Zhang Guanlong，Wang Yue. Tectono-sedimentary framework of Early Permian in Junggar Basin and its petroleum geological significance[J].Petroleum Geology and Recovery Efficiency，2023,30(1):35-48.
[23] 党文龙，高岗，尤新才，等.准噶尔盆地玛湖凹陷大油区不同类型原油分布及成因[J].石油勘探与开发，2023,50(04):731-741.
Dang Wenlong, Gao Gang, You Xincai, et al. Genesis and distribution of oils in Mahu Sag, Junggar Basin, NW China[J]. Petroleum Exploration and Development, 2023,50(4):840-850
[24] Liu Shiju, Gao Gang, Gang Wenzhe, et al. Comparison of formation conditions of source rocks of Fengcheng and Lucaogou formations in the Junggar Basin, NW China: implications for organic matter enrichment and hydrocarbon potential[J]. Journal of Earth Science, 2022,34(4):1026-1040.
[25] 王绪龙，支东明，王屿涛，等.准噶尔盆地烃源岩与油气地球化学特征[D].北京：石油工业出版社，2013.
Wang Xulong, Zhi Dongming, Wang Yutao, et al. Geochemical characteristics of source rocks and crude oil in the Junggar Basin[D]. Beijing: Petroleum Industry Press, 2013.
[26] 陈建平，王绪龙，邓春萍，等.准噶尔盆地烃源岩与原油地球化学特征[J].地质学报，2016,90(1):37-67.
Chen Jianping, Wang Xulong, Deng Chunping, et al. Geochemical features of source rocks and crude oil in the Junggar Basin, Northwest China[J]. Acta Geologica Sinica, 2016,90(1): 37-67.
[27] 王小军，宋永，郑孟林，等.准噶尔盆地复合含油气系统与复式聚集成藏[J].中国石油勘探，2021,26(4):29-43.
Wang Xiaojun, Song Yong, Zheng Menglin, et al. Composite petroleum system and multi-stage hydrocarbon accumulation in Junggar Basin[J]. China Petroleum Exploration, 2021,26(4): 29-43.
[28] 何登发，贾承造，赵文智，等.中国超深层油气勘探领域研究进展与关键问题[J].石油勘探与开发，2023,50(6):1162-1172.
He Dengfa, Jia Chengzao, Zhao Wenzhi, et al. Research progresss and key issues of ultra-deep oil and gas exploration in China[J]. Petroleum Exploration and Development, 2023,50(6): 1162-1172.