Abstract
Reef-bank of Sichuan (四川) basin have been explored along the platform margin belt on both sides of the Kaijiang (开江)-Liangping (梁平) trough for a long time. Correspondingly, a series of major breakthroughs have been obtained and a number of large oil and gas fields have been found. After the breakthroughs of Kaijiang-Liangping trough, how reef-bank exploration will proceed? Is there another “Kaijiang-Liangping trough” in Sichuan basin? Previous research shows that Sichuan basin underwent intracratonic rift and basement fault activities in Late Permian, developing a paleogeography framework of “three uplifts and three depressions” under the background of the regional large ramp, including Exi (鄂西)-Chengkou (城口) trough, Kaijiang-Liangping trough and Yanting (盐 亭)-Tongnan (潼南) trough. Based on sedimentology and tectonics dynamics analysis, data of drillings, outcrops and seismic, Yanting-Tongnan trough has been discovered in central Sichuan basin in our study which distributes from Mianzhu (绵竹), Jiangyou (江油) in western Sichuan basin through Nanchong (南充) to Guang’an (广安), as long as about 210 km, extending in NW-SE nearly paralleling to Kaijiang-Liangping trough, opening to the sea north-westward, and gradually pinchout to the east platform. Similar to Kaijiang-Liangping trough, another platform margin reef belt distributes along a U-shape belt around Yanting-Tongnan trough, which is expected to become another natural gas accumulation zone after the platform margin around Kaijiang-Liangping trough. The discovery of Yanting-Tongnan trough expands favorable reef exploration area from original 2×104 km2 on both sides of Kaijiang-Liangping trough to more than 6×104 km2 in Yanting-Tongnan trough platform margin belt and Kaijiang-Liangping platform margin belt, greatly enlarging the reef exploration field. But compared to Kaijiang-Liangping trough, Yanting-Tongnan trough is relatively shallower and smaller, and the scale and quality of reef-bank reservoirs in its margin belt is a little poor relatively. Therefore, much research should be done timely such as comparative study of two troughs, detailed research of formation and evolution of the trough, regularity of reef migration, meticulous depiction of reef-bank reservoir size and distribution in order to obtain major breakthroughs around the Yanting-Tongnan trough.
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References Cited
Fan, J. S., Wu, Y. S., 2002. Restudies on Permian Reefs in Eastern Sichuan, China. Oil & Gas Geology, 23(1): 12–18 (in Chinese with English Abstract)
He, L., Luo, X., Liu, L. P., et al., 2008. A Discussion on Depositional Environment in Late Permian and Distribution of Reef-Bank in Sichuan Basin. Natural Gas Industry, 28(1): 28–33 (in Chinese with English Abstract)
Huang, S. J., Qin, H. R., Hu, Z. W., et al., 2008. Cathodoluminescence and Diagenesis of the Carbonate Rocks in Feixianguan Formation of Triassic, Eastern Sichuan Basin of China. Earth Science—Journal of China University of Geosciences, 33(1): 26–34 (in Chinese with English Abstract)
Li, J. J., Lu, S. F., Xue, H. T., et al., 2008. Migration and Accumulation Efficiency of Natural Gas in Feixianguan Formation Oolitic Gas Reservoirs, Northeastern Sichuan Basin. Earth Science—Journal of China University of Geosciences, 33(4): 565–571 (in Chinese with English Abstract)
Luo, Z. L., 2009. Emei Taphrogenesis and Natural Gas Prospecting Practices in Sichuan Basin. Xinjiang Petroleum Geology, 30(4): 419–424 (in Chinese with English Abstract)
Ma, Y. S., Guo, X. S., Guo, T. L., et al., 2005. Discovery of the Large-Scale Puguang Gas Field in the Sichuan Basin and Its Enlightenment for Hydroearbon Prospecting. Geological Review, 51(4): 477–480 (in Chinese with English Abstract)
Ma, Y. S., Guo, X. S., Guo, T. L., et al., 2007. The Puguang Gas Field: New Giant Discovery in the Mature Sichuan Basin, Southwest China. AAPG Bull., 91(5): 627–643, doi:10.1306/11030606062
Ma, Y. S., Mou, C. L., Guo, X. S., et al., 2006. Characteristic and Framework of the Changxingian Sedimentation in the Northeastern Sichuan Basin. Geological Review, 52(1): 25–29 (in Chinese with English Abstract)
Michel, T. H., 2003. Giant Oil and Gas Fields of the Decade, 1990–1999. AAPG Memoir, 78: 123–137
Ni, X. F., Chen, H. D., Tian, J. C., et al., 2007. Sedimentary Framework of Changxing-Feixianguan Formations and Its Control on Reservoiring in Northeastern Sichuan Basin. Oil & Gas Geology, 28(4): 458–465 (in Chinese with English Abstract)
Read, J. F., 1985. Carbonate Platform Facies Models. The American Association of Petroleum Geologist, Bulletin, 69(1): 1–21
Tan, X. C., Nie, Y., Xi, W. Y., et al., 2011. Primary Intergranular Pores in Oolitic Shoal Reservoir of Lower Triassic Feixianguan Formation, Sichuan Baisn, Southwest China: Fundamental for Reservoir Formation and Retention Diagenesis. Journal of Earth Science, 22(1): 101–114, doi:10.1007/s12583-011-0160-2
Tucker, M. E., Wilson, J. M., Crevello, P. D., et al., 1990. Carbonate Platforms: Facies, Sequences and Evolution. Blackwell Scientific Publications, London. 79–108
Wang, X. Z., Zhang, F., Ma, Q., et al., 2002. The Characteristics of Reef and Bank and the Fluctuation of Sea-Level in Feixianguan Period of Late Permian-Early Triassic, East Sichuan Basin. Acta Sedimentologica Sinica, 20(2): 249–254 (in Chinese with English Abstract)
Wang, Y. G., Hong, H. T., Xia, M. L., et al., 2008. Exploration of Reef-Bank Gas Reservoirs Surrounding Permian and Triassic Troughs in Sichuan Basin. Natural Gas Industry, 28(1): 22–27 (in Chinese with English Abstract)
Wang, Y. G., Wen, Y. C., Hong, H. T., et al., 2006. Petroleum Geological Characteristics of Deep Water Deposits in Upper Permian-Lower Triassic Trough in Sichuan Basin and Adjacent Areas. Oil & Gas Geology, 27(5): 702–714 (in Chinese with English Abstract)
Wang, Y. G., Wen, Y. C., Zhang, F., et al., 1998. Distribution Law of the Organic Reefs in Changxing Formation of Upper Permain in East Sichuan. Natural Gas Industry, 18(6): 10–15 (in Chinese with English Abstract)
Wang, Y. G., Zhang, J., Yang, Y., et al., 2000. Forming Mechanism of Reef Gas Fields in Changxing Formation of Upper Permain in East Sichuan Basin. Marine Origin Petroleum Geology, 5(1–2): 145–152 (in Chinese)
Wang, Y. M., Tong, C. G., Xu, G. Q., et al., 1991. On the Characteristics and Mechanism of Basement Faults in Central Sichuan Basin. Journal of Chengdu College of Geology, 18(3): 52–60 (in Chinese with English Abstract)
Wang, Z. C., Zhao, W. Z., Peng, H. Y., 2002. Charaeteristies of Multi-Source Petroleum Systems in Sichuan Basin. Petroleum Exploration and Development, 29(2): 26–28 (in Chinese with English Abstract)
Wei, G. Q., Chen, G. S., Yang, W., et al., 2004. Sedimentary System of Platformal Trough of Feixianguan Formation of Lower Triassic in Northern Sichuan Basin and Its Evolution. Acta Sedimentologica Sinica, 22(2): 254–260 (in Chinese with English Abstract)
Wei, G. Q., Xie, Z. Y., Liu, M. C., et al., 2009. Favorable Reservoir Facies Tracts in the Changxing-Feixianguan Formations of Sichuan Basin. Natural Gas Industry, 29(9): 35–38 (in Chinese with English Abstract)
Wilson, J. L., 1975. Carbonate Facies in Geologic History. Springer-Verlag, New York. 1–347
Yang, Y. Q., Feng, Z. Z., 2000. Permian Depositional Systems in South China. Journal of Palaeogeography, 2(1): 11–18 (in Chinese with English Abstract)
Yang, Y., Wen, Y. C., 2002. Control of Kaijiang-Liangping Trough Growing on T1f Oolite Distribution in Northeast Sichuan Basin. Natural Gas Industry, 22(Suppl.): 30–32 (in Chinese with English Abstract)
Zhai, G. M., Wang, S. Y., Shi, X. Z., et al., 1989. Petroleum Geology of China. Petroleum Industry Press, Beijing. 1–10 (in Chinese)
Zhao, W. Z., Xu, C. C., Wang, T. S., et al., 2011. Comparative Study of Gas Accumulations in the Permian Changxing Reefs and Triassic Feixianguan Oolitic Reservoirs between Longgang and Luojiazhai-Puguang in the Sichuan Basin. Chinese Science Bulletin, 56(31): 3310–3320, doi:10.1007/s11434-011-4668-8
Zheng, R. C., Dang, L. R., Wen, H. G., et al., 2011. Diagenesis Characteristics and System for Dolostone in Feixianguan Formation of Northeast Sichuan. Earth Science—Journal of China University of Geosciences, 36(4): 659–669 (in Chinese with English Abstract)
Zhou, X. Y., Wang, Z. M., Yang, H. J., et al., 2006. Tazhong Ordovician Condensate Field in Tarim Basin. Marine Origin Petroleum Geology, 11(1): 45–51 (in Chinese with English Abstract)
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This study was supported by the Prominent National Projects of Science and Technology of China (No. ZDZX201105004-01).
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Li, Q., Wang, Z., Li, J. et al. Discovery of Yanting-Tongnan trough of late Permian in Sichuan basin and its significance. J. Earth Sci. 23, 582–596 (2012). https://doi.org/10.1007/s12583-012-0276-z
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DOI: https://doi.org/10.1007/s12583-012-0276-z