Quantitative evaluation and models of hydrocarbon accumulation controlled by faults in the Pearl River Mouth Basin
Keywords:
Pearl River Mouth Basin, fault activities, migration efficiency, fault sealing, hydrocarbon migration, hydrocarbon accumulation modelsAbstract
The Pearl River Mouth Basin is the largest petroliferous basin in the northern South China Sea, where hydrocarbon accumulation is strongly controlled by fault activities. This study performed the quantitative evaluation of the effects of faults on hydrocarbon migration and accumulation in the basin. The results indicate that the critical values of vertical migration of middle-shallow hydrocarbon, including the active strength of faults and the ratio of fault throw to shale caprock thickness, were up to 10 m/Ma and 5, respectively. The lateral hydrocarbon migration efficiency of the unbreached relay zone was higher than that of the barely breached and strongly breached types. The lower critical value of shale gouge ratio for the clay sealing efficiency was 0.32. Additionally, the zones with the EW-trending transtensional faults were found to have unique dual functions of migration and stress sealing, suggesting that the linking fault positions play important roles in the lateral migration of hydrocarbons. Finally, seven hydrocarbon accumulation models controlled by faults in different tectonic settings were constructed to clarify the effects of faults on the vertical and lateral migrations of hydrocarbon. These models suggested that fine hydrocarbon exploration should be undertaken in the northeastern Baiyun Sag, and that middle-deep hydrocarbon exploration should be enhanced in the Enping, Huizhou, and southwestern Baiyun Sags.
Document Type: Original article
Cited as: Peng, G., Wu, Z., Dai, Y., Zhang, L., Yu, S., Wang, W., Pang, H. Quantitative evaluation and models of hydrocarbon accumulation controlled by faults in the Pearl River Mouth Basin. Advances in Geo-Energy Research, 2023, 8(2): 89-99. https://doi.org/10.46690/ager.2023.05.03
ReferencesAllan, U. S. Model for Hydrocarbon Migration and Entrapment within faulted structures. AAPG Bulletin, 1989, 73(7): 803-811.
Bai, H., Cheng, X., Zhao, C., et al. Fault shadow imaging in the Zhu I depression of the Pearl River Mouth Basin: Technology and practice. Geophysical Prospecting for Petroleum, 2022, 61(2): 329-338.
Bouvier, J. D., Kaars-Sijpesteijn, C. H., Kluesner, D. F., et al. Three-dimensional seismic interpretation and fault sealing investigations, Nun River Field, Nigeria. AAPG Bulletin, 1989, 73(11): 1397-1414.
Chen, C., Shi, H., Xu, S., et al. Formation conditions of tertiary hydrocarbon accumulation in the eastern Pearl River Mouth basin. Science Press, 2003. (in Chinese)
Deng, S., Zhao, R., Kong, Q., et al. Two distinct strike-slip fault networks in the Shunbei area and its surroundings, Tarim Basin: Hydrocarbon accumulation, distribution, and controlling factors. AAPG Bulletin, 2022, 106(1): 77-102.
Fossen, H., Rotevatn, A. Fault linkage and relay structures in extensional settings-A review. Earth-Science Reviews, 2016, 154: 14-28.
Fu, X., Song, X., Wang, H., et al. Formation Mechanism and Validity Comprehensive Evaluation on the Fault-Bound Trap in the rift Basin: Take the Qikou depression in the Bohai Bay Basin as an example. Petroleum Exploration and Development, 2021, 48(4): 787-797.
Gawthorpe, R. L., Hurst, J. M. Transfer zones in extensional basins: their structural style and influence on drainage development and stratigraphy. Journal of the Geological Society, 1993, 150(6): 1137-1152.
Gibson, R. G. Fault-zone seals in siliciclastic strata of the Columbus Basin, offshore Trinidad. AAPG Bulletin, 1994, 78(9): 1372-1385.
Hall, R. Cenozoic geological and plate tectonic evolution of SE Asia and the SW Pacific: Computer-based reconstructions, model and animations. Journal of Asian Earth Sciences, 2002, 20(4): 353-431.
He, M., Zhu, W., Wu Z., et al. Neotectonic movement characteristics and hydrocarbon accumulation of the Pearl River Mouth Basin. China Offshore Oil and Gas, 2019, 31(5): 9-20. (in Chinese)
Hindle, A. D. Petroleum migration pathways and charge concentration: A three-dimensional model. AAPG Bulletin, 1997, 81(9): 1451-1481.
Huang, L., Liu, C., Wang, Y., et al. Hydrocarbon accumulation in strike-slip fault restraining bends: New insights into the tectonic controls on the Penglai 19-3 and Penglai 25-6 oil fields, Tan-Lu fault zone, east China. AAPG Bulletin, 2016, 100(8): 1239-1263.
Huang, K., Zhong, G., He, M., et al. Growth and linkage of a complex oblique-slip fault zone in the Pearl River Mouth Basin, northern South China Sea. Journal of Structural Geology, 2018, 117: 27-43.
Jiang, M., Chen, D., Chang, X., et al. Controlling effect of tectonic-paleogeomorphology on deposition in the south of Lufeng sag, Pearl River Mouth Basin. Advances in Geo-Energy Research, 2022, 6(5): 363-374.
Jiang, D., He, M., Zhang, X., et al. Difference of hydrocarbon accumulation between hanging and footwall of half graben boundary fault and exploration practice: A case study of X sag in Huizhou depression, Pearl River Mouth Basin, Northern South China Sea. Journal of Jilin University (Earth Science Edition), 2019, 49(2): 346-355. (in Chinese)
Jiang, H., Pang, X., Shi, H., et al. Effects of fault activities on hydrocarbon migration and accumulation in the Zhu I Depression, Pearl River Mouth Basin, South China Sea. Australian Journal of Earth Sciences, 2015, 62(6): 775-788.
Knipe, R. J. Juxtaposition and seal diagrams to help analyze fault seals in hydrocarbon reservoir. AAPG Bulletin, 1997, 81(2): 187-195.
Li, P. Structural features and oil & gas accumulation in Pearl River Mouth basin. Guangdong Geology, 1994, 9(4): 21-28. (in Chinese)
Li, H., Wang, R., Peng, H., et al. Types of the transfer ramp and its controlling hydrocarbon in the Southwest of Huizhou Depression, Pearl River Mouth Basin. Geological Science and Technology Information, 2018, 37(1): 46-52. (in Chinese)
Li, H., Yu, F., Wang, M., et al. Quantitative prediction of structural fractures in the Paleocene lower Wenchang formation reservoir of the Lufeng Depression. Advances in Geo-Energy Research, 2022, 6(5): 375-387.
Lindsay, N. G., Murphy, F. C., Walsh, J. J., et al. Outcrop studies of shale smears on fault surface, in The Geological Modelling of Hydrocarbon Reservoirs and Outcrop Analogues, edited by Stephen S. Flint, lan D. Bryant, Blackwell Scientific Pbulications, Hoboken, pp. 113-123, 1993.
Lv, Y., Wang, Y., Fu G., et al. Evaluation of the drilling risk of fault traps in the Zhu I Depressionin the Pearl River Mouth basin. Acta Petrolei Sinica, 2011, 32(1): 99-104. (in Chinese)
Mandujano, J. J., Khachaturov, R. V., Tolson, G., et al. Curvature analysis applied to the Cantarell structure, southern Gulf of Mexico: Implications for hydrocarbon exploration. Computers & geosciences, 2005, 31(5): 641-647.
Mi, L., Zhang, Z., Pang, X., et al. Main controlling factors of hydrocarbon accumulation in Baiyun Sag at northern continental margin of South China Sea. Petroleum Exploration and Development, 2018, 45(5): 158-169. (in Chinese)
Morley, C. K., Nelson, R. A., Patton, T. L., et al. Transfer zones in the East African Rift system and their relevance to hydrocarbon exploration in rifts. AAPG Bulletin, 1990, 74(8): 1234-1253.
Pang, X., Li, H., Pang, H. Exploring the mysteries of deep oil and gas formation in the South China Sea to guide Palaeocene exploration in the Pearl River Mouth Basin. Advances in Geo-Energy Research, 2022, 6(5): 361-362.
Peng, G., Liu, C., Wu, J., et al. The control action of latestage fracture system on hydrocarbon accumulation in the Panyu 4 sag in Pearl River Mouth Basin. Special Oil & Gas Reservoirs, 2013, 20(3): 41-45. (in Chinese)
Ren, J., Tamaki, K., Li, S., et al. Late Mesozoic and Cenozoic rifting and its dynamic setting in Eastern China and adjacent areas. Tectonophysics, 2002, 344(3-4): 175-205.
Shi, H., He, M., Zhang, L., et al. Hydrocarbon geology, accumulation pattern and the next exploration strategy in the eastern Pearl River Mouth Basin. China Offshore Oil and Gas, 2014, 26(3): 11-22. (in Chinese)
Sibson, R. H., Moore, J. M., Rankin, A. H. Seismic pumpinga hydrothermal fluid transport mechanism. Journal of the Geological Society, 1975, 131(6): 653-659.
Smith, D. A. Theoratical consideration of sealing and nonsealing faults. AAPG Bulletin, 1966, 50(2): 363-374. Smith, D. A. Sealing and nonsealing faults in Louisiana Gulf Coast salt basin, AAPG Bulletin, 1980, 64(2): 145-172.
Sorkhabi, R., Tsuji, Y. The place of faults in petroleum traps. AAPG Memoir, 2005, 85: 1-31.
Sun, Z., Xu, Z., Sun, L., et al. The mechanism of post-rift fault activities in Baiyun sag, Pearl River Mouth Basin. Journal of Asian Earth Sciences, 2014, 89(3): 76-87.
Walker, C., Anderson, G. Simple and efficient representation of faults and fault transmissibility in a reservoir simulator-Case study from the Mad Dog Field, GCAGS Transactions, 2016, 66: 1109-1116.
Wang, H., Lv, Y., Fu, X., et al. Formation evolution and reservoir controlling mechanism of relay zone in rift basin. Geological Science and Technology Information, 2013, 32(4): 105-113. (in Chinese)
Wang, W., Pang, X., Chen, Z., et al. Quantitative evaluation of migration efficiency of fault-reservoir composite migration pathway systems in carbonate petroliferous basins. Energy, 2021, 222: 119983.
Wu, Z., Wang, W., Zhang, Z., et al. Growth process of transtensional fault and evaluations of hydrocarbon lateral migration across fault: A case from Enping sag in Pearl River Mouth Basin. Marine Geology Frontiers, 2020, 36(1): 45-53. (in Chinese)
Xu, X., Chen, S., Wang, F., et al. Structural Features and Its Impacts on Hydrcarbon Accumulation of Neogene in Enping Sag, Pearl River Mouth Basin. Geoscience, 2014, 28(3): 543-550. (in Chinese)
Yang, F., Sun, Z., Zhou, Z., et al. The evolution of the South China Sea Basin in the Mesozoic-Cenozoic and its significance for oil and gas exploration: A review and overview. AAPG Memoir, 2012, 100: 397-418.
Yielding, G., Freeman, B., Needham, D. T. Quantitative fault seal prediction. AAPG Bulletin, 1997, 81(6): 897-917.
Yu, S., Chen, X., Mei, L., et al. The effect of fault zone characteristics of Zhu I depression on hydrocarbon accumulation. Journal of Oil and Gas Technology, 2012, 34(1): 50-54. (in Chinese)
Zhang, L., Luo, X., Vasseur, G., et al. Evaluation of geological factors in characterizing fault connectivity during hydrocarbon migration: Application to the Bohai Bay Basin. Marine and Petroleum Geology, 2011, 28(9): 1634-1647.
