Research on the differential tectonic-thermal evolution of Longmaxi shale in the southern Sichuan Basin

Lei Zhao, Weijian Mao, Zongbao Liu, Shijun Cheng

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The southern Sichuan Basin in China holds abundant shale gas resources; however, the shale gas bearing property shows great differences due to the multiple stages of tectonic transformation. The key to revealing the shale gas differential enrichment mechanism is to explore the thermal evolution characteristics during tectonic evolution. Therefore, taking the Luzhou and Changning blocks as an example, which have obvious differences in tectonic evolution, the organic geochemical conditions of Longmaxi shale were firstly compared with the test data. Then, the thermal evolution characteristics under the background differential tectonic uplift-erosion were recovered using basin modeling techniques. The results showed that the two blocks contain similar organic geochemical conditions of the Longmaxi shale. Moreover, the hydrocarbon generation condition in Luzhou Block is greater than that in the Changning Block. Influenced by the differential tectonic evolution, the study area experienced a complex burial history and the formation of multiple unconformities. As a result, the present burial depth of Longmaxi Formation in the Luzhou Block is significantly greater than that in the Changning Block. The thermal evolution history of Longmaxi shale in the study area could be divided into three stages, including a low-temperature stage from Caledonian to Hercynian, a middle-temperature stage from Hercynian to Indosinian, and a high-temperature stage from Yanshanian to Himalayan. In addition, it was found that the Himalayan period is the main stage resulting in the differential gas bearing property of Longmaxi shale in the southern Sichuan area. Under the differential structural modification, the peak time of hydrocarbon generation in the Luzhou Block occurred earlier and the conversion rate was slightly higher than that in the Changning Block.

Cited as: Zhao, L., Mao, W., Liu, Z., Cheng, S. Research on the differential tectonic-thermal evolution of Longmaxi shale in the southern Sichuan Basin. Advances in Geo-Energy Research, 2023, 7(3): 152-163.


Tectonic-thermal evolution, Longmaxi shale, southern Sichuan Basin, buried history, thermal evolution, hydrocarbon generation

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Agrawal, V., Sharma, S. Molecular characterization of kerogen and its implications for determining hydrocarbon potential, organic matter sources and thermal maturity in Marcellus Shale. Fuel, 2018, 228: 429-437.

Bernard, S., Horsfield, B., Schulz, H. M., et al. Geochemical evolution of organic-rich shales with increasing maturity: A STXM and TEM study of the Posidonia Shale (Lower Toarcian, northern Germany). Marine and Petroleum Geology, 2012a, 31(1): 70-89.

Bernard, S., Wirth, R., Schreiber, A., et al. Formation of nanoporous pyrobitumen residues during maturation of the Barnett Shale (Fort Worth Basin). International Journal of Coal Geology, 2012b, 103: 3-11.

Bitchong, A. M., Ottou, J. P. B., Bitjong, S. A., et al. Preliminary source rock evaluation, paleo-depositional environment and hydrocarbon generation potential of the cretaceous organic-rich outcrops of Mayo-Figuil River, Babouri-Figuil Basin, Northern Benue Trough (Yola arm) Cameroon: Insights from bulk geochemistry. Journal of African Earth Sciences, 2022, 192: 104568.

Bowker, K. A. Barnett shale gas production, Fort Worth Basin: Issues and discussion. AAPG Bulletin, 2007, 91(4): 523-533.

Bruns, B., Littke, R., Gasparik, M., et al. Thermal evolution and shale gas potential estimation of the Wealden and Posidonia Shale in NW-Germany and the Netherlands: A 3D basin modelling study. Basin Research, 2016, 28(1): 2-33.

Chandra, D., Bakshi, T., Vishal, V. Thermal effect on pore characteristics of shale under inert and oxic environments: Insights on pore evolution. Microporous and Mesoporous Materials, 2021, 316: 110969.

Chen, S., Zhu, Y., Chen, S., et al. Hydrocarbon generation and shale gas accumulation in the Longmaxi Formation, Southern Sichuan Basin, China. Marine and Petroleum Geology, 2017, 86: 248-258.

Choudhury, T. R., Banerjee, S., Khanolkar, S. The geochemical affinity of paleogene glauconites in paleo-tethyan deposits of India, in Geochemical Treasures and Petrogenetic Processes, edited by J. S. Armstrong-Altrin, K. Pandarinath and S. K. Verma, Springer, Singapore, pp. 243-277, 2022.

Curtis, M. E., Cardott, B. J., Sondergeld, C. H., et al. Development of organic porosity in the Woodford Shale with increasing thermal maturity. International Journal of Coal Geology, 2012, 103: 26-31.

Dembicki, H. Three common source rock evaluation errors made by geologists during prospect or play appraisals. AAPG Bulletin, 2009, 93(3): 341-356.

Feng, Q., Qiu, N., Borjigin, T., et al. Tectonic evolution revealed by thermo-kinematic and its effect on shale gas preservation. Energy, 2022, 240: 122781.

Fu, Y., Jiang, Y., Wang, Z., et al. Non-connected pores of the Longmaxi shale in southern Sichuan Basin of China. Marine and Petroleum Geology, 2019, 110: 420-433.

Gao, Z., Fan, Y., Xuan, Q., et al. A review of shale pore structure evolution characteristics with increasing thermal maturities. Advances in Geo-Energy Research, 2020, 4(3): 247-259.

Guo, X., Li, Y., Borjigen, T., et al. Hydrocarbon generation and storage mechanisms of deep-water shelf shales of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Sichuan Basin, China. Petroleum Exploration and Development, 2020, 47(1): 204-213.

Hazra, B., Dutta, S., Kumar, S. TOC calculation of organic matter rich sediments using Rock-Eval pyrolysis: Critical consideration and insights. International Journal of Coal Geology, 2017, 169: 106-115.

He, K., Zhang, S., Wang, X., et al. Effects of inorganic sulfur species on hydrocarbon conversion and 34S isotope fractionation during thermal maturation of Type II kerogen. Organic Geochemistry, 2022, 168: 104420.

Hickey, J. J., Henk, B. Lithofacies summary of the Mississippian Barnett Shale, Mitchell 2 T.P. Sims well, Wise County, Texas. AAPG Bulletin, 2007, 91(4): 437-443.

Jarvie, D. M., Hill, R. J., Ruble, T. E., et al. Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shalegas assessment. AAPG Bulletin, 2007, 91(4): 475-499.

Jenkins, C. D., Boyer, C. M. Coalbed- and shale-gas reservoirs. Journal of Petroleum Technology, 2008, 60(2): 92-99.

Jin, Z., Nie, H., Liu, Q., et al. Source and seal coupling mechanism for shale gas enrichment in upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Sichuan Basin and its periphery. Marine and Petroleum Geology, 2018, 97: 78-93.

Klaver, J., Desbois, G., Littke, R., et al. BIB-SEM porecharacterization of mature and post mature Posidonia Shale samples from the Hils area, Germany. International Journal of Coal Geology, 2016, 158: 78-89.

Li, Y. Mechanics and fracturing techniques of deep shale from the Sichuan Basin, SW China. Energy Geoscience, 2021, 2(1): 1-9.

Li, G., Gao, P., Xiao, X., et al. Lower cambrian organicrich shales in Southern China: A review of gas-bearing property, pore structure, and their controlling factors. Geofluids, 2022a, 2022: 9745313.

Li, J., Li, H., Yang, C., et al. Geological characteristics and controlling factors of deep shale gas enrichment of the Wufeng-Longmaxi Formation in the Southern Sichuan Basin, China. Lithosphere, 2022b, 2022(Special 12): 4737801.

Liang, C., Jiang, Z., Zhang, C., et al. The shale characteristics and shale gas exploration prospects of the Lower Silurian Longmaxi shale, Sichuan Basin, South China. Journal of Natural Gas Science and Engineering, 2014, 21: 636-648.

Liu, S., Deng, B., Zhong, Y., et al. Unique geologic features of burial and superimposition of the Lower Paleozoic shale gas across the Sichuan basin and its periphery. Earth Science Frontiers, 2016, 23(1): 11-28. (in Chinese)

Liu, B., Mastalerz, M., Schieber, J. SEM petrography of dispersed organic matter in black shales: A review. Earth-Science Reviews, 2022, 224: 103874.

Liu, K., Ostadhassan, M. Multi-scale fractal analysis of pores in shale rocks. Journal of Applied Geophysics, 2017, 140: 1-10.

Liu, W., Wu, J., Jiang, H., et al. Cenozoic exhumation and shale-gas enrichment of the Wufeng-Longmaxi formation in the southern Sichuan basin, western China. Marine and Petroleum Geology, 2021, 125: 104865.

Makeen, Y. M., Abdullah,W. H., Pearson, M. J., et al. Thermal maturity history and petroleum generation modelling for the Lower Cretaceous Abu Gabra Formation in the Fula Sub-basin, Muglad Basin, Sudan. Marine and Petroleum Geology, 2016, 75: 310-324.

Nie, H., Li, D., Liu, G., et al. An overview of the geology and production of the Fuling shale gas field, Sichuan Basin, China. Energy Geoscience, 2020, 1(3-4): 147-164.

Peng, J., Pang, X., Shi, H., et al. Hydrocarbon generation and expulsion characteristics of Eocene source rocks in the Huilu area, northern Pearl River Mouth basin, South China Sea: Implications for tight oil potential. Marine and Petroleum Geology, 2016, 72: 463-487.

Peters, K. E., Xia, X., Pomerantz, A. E., et al. Chapter 3-geochemistry applied to evaluation of unconventional resources, in Unconventional Oil and Gas Resources Handbook, edited by Y. Z. Ma and S. A. Holditch, Gulf Professional Publishing, Boston, pp. 71-126, 2016.

Qiu, Z., Zou, C., Wang, H., et al. Discussion on the characteristics and controlling factors of differential enrichment of shale gas in the Wufeng-Longmaxi formations in south China. Journal of Natural Gas Geoscience, 2020, 5(3): 117-128.

Romero-Sarmiento, M. F., Ducros, M., Carpentier, B., et al. Quantitative evaluation of TOC, organic porosity and gas retention distribution in a gas shale play using petroleum system modeling: Application to the mississippian Barnett shale. Marine and Petroleum Geology, 2013, 45: 315-330.

Shalaby, M. R., Hakimi, M. H., Abdullah, W. H. Geochemical characteristics and hydrocarbon generation modeling of the Jurassic source rocks in the Shoushan Basin, north Western Desert, Egypt. Marine and Petroleum Geology, 2011, 28(9): 1611-1624.

Shi, X., Kang, S., Luo, C., et al. Shale gas exploration potential and reservoir conditions of the Longmaxi Formation in the Changning area, Sichuan Basin, SW China: Evidence from mud gas isotope logging. Journal of Asian Earth Sciences, 2022a, 233: 105239.

Shi, X., Luo, C., Cao, G., et al. Differences of main enrichment factors of S1l11-1 sublayer shale gas in Southern Sichuan Basin. Energies, 2021, 14(17): 5472.

Shi, Z., Zhou, T., Wang, H., et al. Depositional structures and their reservoir characteristics in the Wufeng-Longmaxi shale in Southern Sichuan Basin, China. Energies, 2022b, 15(5): 1618.

Tang, L., Song, Y., Jiang, S., et al. Sealing Mechanism of the roof and floor for the Wufeng-Longmaxi shale gas in the Southern Sichuan Basin. Energy & Fuels, 2020, 34(6): 6999-7018.

Wei, D., Zhao, Y., Liu, H., et al. Where will China’s shale gas industry go? A scenario analysis of socio-technical transition. Energy Strategy Reviews, 2022, 44: 100990.

Xu, H., Zhou, W., Zhang, R., et al. Characterizations of pore, mineral and petrographic properties of marine shale using multiple techniques and their implications on gas storage capability for Sichuan Longmaxi gas shale field in China. Fuel, 2019, 241: 360-371.

Yang, R., He, S., Wang, X., et al. Paleo-ocean redox environments of the Upper Ordovician Wufeng and the first member in lower Silurian Longmaxi formations in the Jiaoshiba area, Sichuan Basin. Canadian Journal of Earth Sciences, 2016, 53(4): 426-440.

Zhang, K., Peng, J., Wang, X., et al. Effect of organic maturity on shale gas genesis and pores development: A case study on marine shale in the upper Yangtze region, South China. Open Geosciences, 2020, 12(1): 1617-1629.

Zhao, W., Zhang, B., Wang, X., et al. Differences in source kitchens for lacustrine in-source and out-of-source hydrocarbon accumulations. Petroleum Exploration and Development, 2021, 48(3): 541-554.

Zhu, C., Xu, M., Shan, J., et al. Quantifying the denudations of major tectonic events in Sichuan basin: Constrained by the paleothermal records. Geology in China, 2009, 36(6): 1268-1277.

Zou, C., Dong, D., Wang, Y., et al. Shale gas in China: Characteristics, challenges and prospects (I). Petroleum Exploration and Development, 2015, 42(6): 753-767.


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