Main controlling factors of enrichment and accumulation pattern of Carboniferous Ceshui Formation shale gas in Lianyuan sag, Central Hunan

MIAO Fengbin; ZHANG Guotao; ZHANG Baomin; LUO Shengyuan; WANG Qiang; TIAN Wei; CHEN Lin

doi:10.12097/gbc.2023.06.016

2024 Vol. 43, No. 10

Article Contents

Article navigation > Geological Bulletin of China > 2024 > 43(10): 1689-1704

Next Article Previous Article

MIAO Fengbin, ZHANG Guotao, ZHANG Baomin, LUO Shengyuan, WANG Qiang, TIAN Wei, CHEN Lin. 2024. Main controlling factors of enrichment and accumulation pattern of Carboniferous Ceshui Formation shale gas in Lianyuan sag, Central Hunan. Geological Bulletin of China, 43(10): 1689-1704. doi: 10.12097/gbc.2023.06.016

Citation:

MIAO Fengbin, ZHANG Guotao, ZHANG Baomin, LUO Shengyuan, WANG Qiang, TIAN Wei, CHEN Lin. 2024. Main controlling factors of enrichment and accumulation pattern of Carboniferous Ceshui Formation shale gas in Lianyuan sag, Central Hunan. Geological Bulletin of China, 43(10): 1689-1704. doi: 10.12097/gbc.2023.06.016

Main controlling factors of enrichment and accumulation pattern of Carboniferous Ceshui Formation shale gas in Lianyuan sag, Central Hunan

Wuhan Center of China Geological Survey (Central South China Innovation Center for Geosciences), Wuhan 430205, Hubei, China

More Information

Corresponding author: ZHANG Guotao, kpasino@163.com

Received Date: 14 June 2023

Revised Date: 09 July 2023

Publish Date: 15 October 2024

Abstract

Abstract

The central Hunan depression is an important area for shale gas exploration in the periphery of the Sichuan Basin, and the Carboniferous Ceshui Formation is the key shale gas layer in this area. Taking the secondary structure Lianyuan sag in the area as the object, based on the field stratigraphic section and drilling data, experimental analysis and field gas−bearing monitoring data, the geological conditions and differential distribution characteristics of shale gas accumulation of the Ceshui Formation were studied. The main controlling factors of enrichment and accumulation pattern of shale gas were discussed above. The results show that: ①Dark shale are mainly developed in the lagoon sedimentary facies area. The shale with a thickness of 30~80 m. The organic matter is mainly type II, total organic carbon content (TOC) greater than 1.5%, 2.0%＜R_o＜3.0%, and has a good foundation for hydrocarbon generation.②The Ceshui Formation is mainly a type of siliceous shale with high brittleness minerals. The shale reservoir space includes organic pores, inorganic pores and fractures, and has the physical characteristics of ultra−low porosity and ultra−low permeability.③The formation of shale gas reservoirs in Ceshui Formation mainly experienced three stages of forming and evolution: early in−situ accumulation, medium−term adjustment and transformation, and late dissipation−residue. The main reservoir formation and transformation period was from the Middle Jurassic to the Early Cretaceous. ④Organic−rich shale formed in the reduction environment of the lagoon facies is the material basis for the formation of gas reservoirs in Ceshui Formation. The thermal evolution degree is an important factor affecting the enrichment and accumulation. Preservation conditions are the key to enrichment and accumulation. The Intraformational detachment structure controls the enrichment degree of gas. Based on the comprehensive analysis, the shale gas accumulation pattern of Ceshui Formation ‘sedimentary environment controlling favorable area and tectonic−decollement controlling preservation and enrichment’ is established. The syncline structure in the lagoon facies area is a favorable region for gas enrichment, and the footwall of the closed reverse fault on both wings of the syncline is a favorable location for gas enrichment.
- main controlling factors of enrichment /
- accumulation pattern /
- shale gas /
- Carboniferous /
- Ceshui Formation /
- Lianyuan sag /
- Central Hunan depression

FullText(HTML)

References

[1]	Bao S J, Lin T, Nie H K, et al. 2016. Preliminary study of the transitional facies shale gas reservoir characteristics: Taking Permian in Xiangzhong depression as an example[J]. Earth Science Frontiers, 23(1): 44−53(in Chinese with English abstract). Google Scholar
[2]	Cao T T, Deng M, Liu H, et al. 2019. Shale gas potential of Yanguanjie Formation and Longtan Formation in central and southeastern Hunan Province[J]. Coal Geology & Exploration, 47(4): 94−103(in Chinese with English abstract). Google Scholar
[3]	Chen A D. 2005. Nitrogen as an index of oil−gas preservation conditions in marine strata[J]. Petroleum Geology & Experiment, 27(1): 85−89(in Chinese with English abstract). Google Scholar
[4]	Guo J H, Kuang L X, Zhu R, et al. 2008. Gas accumulation conditions of Lower Carboniferous in Yangjiashan region of Lianyuan Sag[J]. Journal of Central South University(Science and Technology), 39(1): 178−184(in Chinese with English abstract). Google Scholar
[5]	Hou G J. 1998. Discussion on the tectonic nature of Jiangnan ancient land: Evidence from the features of the Banxi Group in Madiyi area, Hunan Province[J]. Geological Science and Technology Information, 17(3): 1−6(in Chinese with English abstract). Google Scholar
[6]	Huang Y R, Cao Y J, Yang R F, et al. 2017. The characteristic of shale gas generation and accumulation and its exploration potential in Devonian, Xiangzhong Depression[J]. Unconventional Oil & Gas, 4(3): 8−14(in Chinese with English abstract). Google Scholar
[7]	Jarvie D M, Hill R J, Ruble T E, et al. 2007. Unconventional shale−gas systems: The Mississippian Barnett Shale of north−central Texas as one model for thermogenic shale−gas assessment[J]. AAPG Bulletin, 91(4): 475−499. doi: 10.1306/12190606068 CrossRef Google Scholar
[8]	Jiang S, Tang X L, Steve O, et al. 2017. Enrichment Factors and Current Misunderstanding of Shale Oil and Gas: Case Study of Shales in U. S. , Argentina and China[J]. Earth Science, 42(7): 1083−1091(in Chinese with English abstract). Google Scholar
[9]	Li Y X, Wu Y W, Wang Q L, et al. 2023. Main controlling factors of continental shale gas enrichment: A case study of Shanxi Formation in Yan'an exploration area, Ordos Basin[J]. Geological Bulletin of China, 42(9): 1423−1431(in Chinese with English abstract). Google Scholar
[10]	Liu G X, Wo Y J, Pan W L, et al. 2011. Fluid characteristics and hydrocarbon preservation conditions in marine facies strata of middle-upper Yangtze region[J]. Petroleum Geology & Experiment, 33(1): 17−21(in Chinese with English abstract). Google Scholar
[11]	Liu X S. 2008. Characteristics and hydrocarbon generation model of Upper Paleozoic Carbonate source rocks in Xiangzhong Depression[J]. Marine Origin Petroleum Geology, 13(1): 13−17(in Chinese with English abstract). Google Scholar
[12]	Lou Z H, Li M, Jin A M, et al. 2008. Hydrogeological and hydrogeochemical characteristics and hydrocarbon preservation conditions for marine strata in China[J]. Acta Geologica Sinica, 82(3): 387−396(in Chinese with English abstract). Google Scholar
[13]	Ma Y S, Lou Z H, Guo T L, et al. 2006. An exploration on a technological system of petroleum preservation evaluation for marine strata in South China[J]. Acta Geologica Sinica, 80(3): 406−417(in Chinese with English abstract). Google Scholar
[14]	Miao F B, Tan H, Wang Q, et al. 2016. Preservation conditions research on shale gas for Ceshui Formation of Carboniferous in Lianyuan Depression in the middle of Hunan Province[J]. Geological Science and Technology Information, 35(6): 90−97(in Chinese with English abstract). Google Scholar
[15]	Miao F B, Zhang B M, Zhang G T, et al. 2023. Controlling factors for the differential enrichment of Devonian Shetianqiao Formation shale gas in Lianyuan Sag, central Hunan[J]. Natural Gas Geoscience, 34(9): 1482−1499(in Chinese with English abstract). Google Scholar
[16]	Nie H K, He Z L, Liu G X, et al. 2020. Status and direction of shale gas exploration and development in China[J]. Journal of China University of Mining & Technology, 49(1): 13−35(in Chinese with English abstract). Google Scholar
[17]	Tian W, Peng Z Q, Bai Y S, et al. 2019. Reservoir Characteristics and Exploration Potential of Lower Carboniferous Shale Gas in Lianyuan Sag, Central Hunan[J]. Earth Science, 44(3): 939−952(in Chinese with English abstract). Google Scholar
[18]	Wang F Y, Guan J, Feng W P, et al. 2013. Evolution of overmature marine shale porosity and implication to the free gas volume[J]. Petroleum Exploration and Development, 40(6): 764−768(in Chinese with English abstract). Google Scholar
[19]	Wang M Y, Guo J H, Kuang L X, et al. 2010. Geochemical characteristics and evolution of the hydrocarbon source rocks from Lianyuan Depression in the Middle of Hunan Province[J]. Natural Gas Geoscience, 21(5): 721−726(in Chinese with English abstract). Google Scholar
[20]	Wang Q, Bai Y S, Miao F B. 2016. Study on mineral composition and brittleness characteristics of the Ceshui formation shale in Lianyuan Depression[J]. Geology and Mineral Resources of South China, 32(2): 166−171(in Chinese with English abstract). Google Scholar
[21]	Wang Y M, Huang J L, Li X J, et al. 2015. Quantitative characterization of fractures and pores in shale beds of the Lower Silurian, Longmaxi Formation, Sichuan Basin[J]. Natural Gas Industry, 35(9): 8−15(in Chinese with English abstract). Google Scholar
[22]	Xia Z Y, Ma H Y, Fang K, et al. 2019. Rock mechanical properties and fracability of continental shale in Zhanhua Sag, Bohai Bay Basin[J]. Petroleum Geology and Experiment, 41(1): 134−141(in Chinese with English abstract). Google Scholar
[23]	Yun W, Xu Z B, Yang X T. 1994. Charaeteristics of detaehment struetures in theWest of Lianyuan Depression[J]. Journal of China University of Mining & Technology, 23(1): 16−25(in Chinese with English abstract). Google Scholar
[24]	Zhai G Y, Wang Y F, Bao S J, et al. 2017. Major Factors Controlling the Accumulation and High Productivity of Marine Shale Gas and Prospect Forecast in Southern China. Earth Science, 42(7): 1057−1068 (in Chinese with English abstract). Google Scholar
[25]	Zhang L T, Guo J H, Jiao P, et al. 2014. Accumulation conditions and exploration potential of shale gas of Lower Carboniferous in Lianyuan Depression in the middle of Hunan Province[J]. Journal of Central South University(Science and Technology), 45(7): 2268−2277(in Chinese with English abstract). Google Scholar
[26]	Zhao P, Li X Q, Sun J, et al. 2014. Study on mineral composition and brittleness characteristics of shale gas reservoirs from the Lower Paleozoic in the southern Sichuan Basin[J]. Geoscience, 28(2): 396−403(in Chinese with English abstract). Google Scholar
[27]	Zhou J G, Deng H Y, Feng J L. 2003. Tectonic evolution and forming of hydrocarbon reservoir in the Lianyuan Depression, Hunan[J]. Chinese Journal of Geology, 38(1): 44−51(in Chinese with English abstract). Google Scholar
[28]	包书景, 林拓, 聂海宽, 等. 2016. 海陆过渡相页岩气成藏特征初探: 以湘中坳陷二叠系为例[J]. 地学前缘, 23(1): 44−53. Google Scholar
[29]	曹涛涛, 邓模, 刘虎, 等. 2019. 湘中与湘东南岩关阶组和龙潭组页岩气潜力[J]. 煤田地质与勘探, 47(4): 94−103. doi: 10.3969/j.issn.1001-1986.2019.04.015 CrossRef Google Scholar
[30]	陈安定. 2005. 氮气对海相地层油气保存的指示作用[J]. 石油实验地质, 27(1): 85−89. doi: 10.3969/j.issn.1001-6112.2005.01.015 CrossRef Google Scholar
[31]	郭建华, 旷理雄, 朱锐, 等. 2008. 湘中涟源凹陷杨家山地区下石炭统天然气成藏条件[J]. 中南大学学报(自然科学版), (1): 178−184. Google Scholar
[32]	侯光久. 1998. 江南古陆的构造属性讨论——以湖南马底驿地区板溪群为例[J]. 地质科技情报, 17(3): 1−6. Google Scholar
[33]	黄俨然, 曹运江, 杨荣丰, 等. 2017. 湘中坳陷泥盆系页岩气生储特征及勘探潜力研究[J]. 非常规油气, 4(3): 8−14. doi: 10.3969/j.issn.2095-8471.2017.03.002 CrossRef Google Scholar
[34]	蒋恕, 唐相路, Steve O, 等. 2017. 页岩油气富集的主控因素及误辩: 以美国、阿根廷和中国典型页岩为例[J]. 地球科学, 42(7): 1083−1091. Google Scholar
[35]	李艳霞, 吴雨威, 王巧玲, 等. 2023. 陆相页岩气富集主控因素—以鄂尔多斯盆地延安探区山西组为例[J]. 地质通报, 42(9): 1423−1431. doi: 10.12097/j.issn.1671-2552.2023.09.001 CrossRef Google Scholar
[36]	刘光祥, 沃玉进, 潘文蕾, 等. 2011. 中上扬子区海相层系流体特征与油气保存条件[J]. 石油实验地质, 33(1): 17−27. doi: 10.3969/j.issn.1001-6112.2011.01.003 CrossRef Google Scholar
[37]	刘喜顺. 2008. 湘中坳陷上古生界碳酸盐岩烃源岩特征及生烃模式[J]. 海相油气地质, 13(1): 13−17. doi: 10.3969/j.issn.1672-9854.2008.01.003 CrossRef Google Scholar
[38]	楼章华, 李梅, 金爱民, 等. 2008. 中国海相地层水文地质地球化学与油气保存条件研究[J]. 地质学报, 82(3): 387−396. doi: 10.3321/j.issn:0001-5717.2008.03.014 CrossRef Google Scholar
[39]	马永生, 楼章华, 郭彤楼, 等. 2006. 中国南方海相地层油气保存条件综合评价技术体系探讨[J]. 地质学报, 80(3): 406−417. doi: 10.3321/j.issn:0001-5717.2006.03.013 CrossRef Google Scholar
[40]	苗凤彬, 谭慧, 王强, 等. 2016. 湘中涟源凹陷石炭系测水组页岩气保存条件[J]. 地质科技情报, 35(6): 90−97. Google Scholar
[41]	苗凤彬, 张保民, 张国涛等. 2023. 湘中涟源凹陷泥盆系佘田桥组页岩气差异性富集控制因素[J]. 天然气地球科学, 34(9): 1482−1499. Google Scholar
[42]	聂海宽, 何治亮, 刘光祥, 等. 2020. 中国页岩气勘探开发现状与优选方向[J]. 中国矿业大学学报, 49(1): 13−35. Google Scholar
[43]	田巍, 彭中勤, 白云山, 等. 2019. 湘中涟源凹陷石炭系测水组页岩气成藏特征及勘探潜力[J]. 地球科学, 44(3): 939−952. Google Scholar
[44]	王飞宇, 关晶, 冯伟平, 等. 2013. 过成熟海相页岩孔隙度演化特征和游离气量[J]. 石油勘探与开发, 40(6): 764−768. doi: 10.11698/PED.2013.06.19 CrossRef Google Scholar
[45]	王明艳, 郭建华, 旷理雄, 等. 2010. 湘中坳陷涟源凹陷烃源岩油气地球化学特征[J]. 天然气地球科学, 21(5): 721−726. Google Scholar
[46]	王强, 白云山, 苗凤彬. 2016. 湖南涟源凹陷下石炭统测水组泥页岩矿物组分与脆性特征研究[J]. 华南地质与矿产, 32(2): 166−171. Google Scholar
[47]	王玉满, 黄金亮, 李新景, 等. 2015. 四川盆地下志留统龙马溪组页岩裂缝孔隙定量表征[J]. 天然气工业, 35(9): 8−15. doi: 10.3787/j.issn.1000-0976.2015.09.002 CrossRef Google Scholar
[48]	夏遵义, 马海洋, 房堃. 2019. 渤海湾盆地沾化凹陷陆相页岩储层岩石力学特征及可压裂性研究[J]. 石油实验地质, 41(1): 134−141. doi: 10.11781/sysydz201901134 CrossRef Google Scholar
[49]	云武, 徐志斌, 杨雄庭. 1994. 湖南涟源凹陷西部滑脱带构造特征[J]. 中国矿业大学学报, 23(1): 16−25. Google Scholar
[50]	翟刚毅, 王玉芳, 包书景, 等. 2017. 我国南方海相页岩气富集高产主控因素及前景预测[J]. 地球科学, 42(7): 1057−1068. Google Scholar
[51]	张琳婷, 郭建华, 焦鹏, 等. 2014. 湘中地区涟源凹陷下石炭统页岩气藏形成条件[J]. 中南大学学报(自然科学版), 45(7): 2268−2277. Google Scholar
[52]	赵佩, 李贤庆, 孙杰, 等. 2014. 川南地区下古生界页岩气储层矿物组成与脆性特征研究[J]. 现代地质, 28(2): 396−403. doi: 10.3969/j.issn.1000-8527.2014.02.018 CrossRef Google Scholar
[53]	周进高, 邓红婴, 冯加良. 2003. 湖南涟源凹陷构造演化与油气成藏研究[J]. 地质科学, 38(1): 44−51. doi: 10.3321/j.issn:0563-5020.2003.01.005 CrossRef Google Scholar