Abstract
Deep-water coarse-grained channels are embedded within a polygonal fault tier, and the polygonal faults (PFs) present non-polygonal geometries rather than classic polygonal geometry in plan view. However, PFs present differences when they encounter deep-water (coarse-grained vs. fine-grained) channels with different lithology, which has not been further studied to date. 3D seismic data and a drilling well from Beijiao sag of Qiongdongnan basin, South China Sea were utilized to document the plan view and cross-sectional properties of the PFs and their differences and genetic mechanism were investigated. Results show that, first, PFs can be divided morphologically into channel-segmenting PFs and channel-bounding PFs in plan view. The former virtually cuts or segments the axes of channels in high- and low-amplitudes, and the latter nearly parallels the boundaries of the channels. Both are approximately perpendicular to each other. Secondly, channel-bounding PFs that related to low-amplitude channels are much longer than those of high-amplitude ones; channel-segmenting PFs related to low-amplitude channels are slightly longer than the counterparts related to high-amplitude channels. Lastly, the magnitudes (e.g., heights) of the PFs are proportional to the scales (e.g., widths and heights) of low-amplitude channels, whereas the magnitudes of the PFs are inversely proportional to the scales of high amplitude channels. Coarse-grained (high amplitude) channels act as a mechanical barrier to the propagation of PFs, whereas fine-grained (low-amplitude) channels are beneficial to the propagation and nucleation of PFs. Additionally, the genetic mechanism of PFs is discussed and reckoned as combined geneses of gravitational spreading and overpressure hydrofracture. The differences of the PFs can be used to reasonably differentiate coarse-grained channels from fine-grained channels. This study provides new insights into understanding the different geometries of the PFs related to coarse-grained and fine-grained channels and their genetic mechanism.
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Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
References
Alrefaee H A, Ghosh S, Abdel-Fattah M I. 2018. 3D seismic characterization of the polygonal fault systems and its impact on fluid flow migration: an example from the Northern Carnarvon Basin, Australia. Journal of Petroleum Science and Engineering, 167: 120–130.
Brown A R. 2011. Interpretation of Three-Dimensional Seismic Data. 7th edn. American Association of Petroleum Geologists, Tulsa, USA. 145p.
Cartwright J. 2011. Diagenetically induced shear failure of fine-grained sediments and the development of polygonal fault systems. Marine and Petroleum Geology, 28(9): 1593–1610.
Cartwright J A, Dewhurst D N. 1998. Layer-bound compaction faults in fine-grained sediments. GSA Bulletin, 110(10): 1242–1257.
Chen D X, Wu S G, Wang X J et al. 2011. Seismic expression of polygonal faults and its impact on fluid flow migration for gas hydrates formation in deep water of the South China Sea. Journal of Geological Research, 2011: 384785.
Dewhurst D N, Cartwright J A, Lonergan L. 1999. The development of polygonal fault systems by syneresis of colloidal sediments. Marine and Petroleum Geology, 16(8): 793–810.
Ghalayini R, Homberg C, Daniel J M et al. 2017. Growth of layer-bound normal faults under a regional anisotropic stress field. Geological Society, London, Special Publications, 439(1): 57–78.
Han J H, Leng J G, Wang Y M. 2016. Characteristics and genesis of the polygonal fault system in southern slope of the Qiongdongnan Basin, South China Sea. Marine and Petroleum Geology, 70: 163–174.
Hansen D M, Shimeld J W, Williamson M A et al. 2004. Development of a major polygonal fault system in Upper Cretaceous chalk and Cenozoic mudrocks of the Sable Subbasin, Canadian Atlantic margin. Marine and Petroleum Geology, 21(9): 1205–1219.
Hansen J P V, Cartwright J A, Huuse M et al. 2005. 3D seismic expression of fluid migration and mud remobilization on the Gjallar Ridge, offshore mid-Norway. Basin Research, 17(1): 123–139.
Hao F. 2005. Hydrocarbon Generation Kinetics and Mechanism of Hydrocarbon Accumulation in the Overpressure Basins. Science Press, Beijing, China. (in Chinese)
Ho S, Hovland M, Blouet J P et al. 2018. Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted fine-grained sediments, offshore Angola. Solid Earth, 9(6): 1437–1468.
Hoffmann J J L, Gorman A R, Crutchley G J. 2019. Seismic evidence for repeated vertical fluid flow through polygonally faulted strata in the Canterbury Basin, New Zealand. Marine and Petroleum Geology, 109: 317–329.
Ireland M T, Goulty N R, Davies R J. 2011. Influence of stratigraphic setting and simple shear on layer-bound compaction faults offshore Mauritania. Journal of Structural Geology, 33(4): 487–499.
Jackson C A L, Carruthers D T, Mahlo S N et al. 2014. Can polygonal faults help locate deep-water reservoirs? AAPG Bulletin, 98(9): 1717–1738.
King J J, Cartwright J A. 2020. Ultra-slow throw rates of polygonal fault systems. Geology, 48(5): 473–477.
Li J J, Mitra S, Qi J. 2020. Seismic analysis of polygonal fault systems in the Great South Basin, New Zealand. Marine and Petroleum Geology, 111: 638–649.
Li Y F. 2019. The characteristics and origin of unidirectionally migrating channels of Meishan Formation in the Beijiao Sag, Qiongdongnan Basin. Haiyang Xuebao, 41(1): 72–86. (in Chinese with English abstract)
Li Y F, Pu R H, Fan X W et al. 2017. Characteristics and genesis of the polygonal fault system in Beijiao Sag of the Qiongdongnan Basin, the Northern South China Sea. Geotectonica et Metallogenia, 41(5): 817–828. (in Chinese with English abstract)
Li Y F, Pu R H, Zhang G C et al. 2021a. Determining 3D seismic characteristics of the conduit system of the Changchang sag, Qiongdongnan Basin. Interpretation, 9(2): T283–T297.
Li Y F, Pu R H, Zhang G C et al. 2021b. Characteristics and origins of ridges and troughs on the top of the Middle Miocene strata in the Beijiao Sag of the Qiongdongnan Basin, northern South China Sea. Interpretation, 9(2): SB1–SB15.
Li Y F, Zhang G C, Pu R H et al. 2021c. Characteristics and origins of middle Miocene mounds and channels in the northern South China Sea. Acta Oceanologica Sinica, 40(2): 65–80.
Roberts S J, Nunn J A. 1995. Episodic fluid expulsion from geopressured sediments. Marine and Petroleum Geology, 12(2): 195–204.
Ru K, Pigott J D. 1986. Episodic rifting and subsidence in the South China Sea. AAPG Bulletin, 70(9): 1136–1155.
Stewart S A, Davies R J. 2006. Structure and emplacement of mud volcano systems in the South Caspian Basin. AAPG Bulletin, 90(5): 771–786.
Su M, Xie X N, Xie Y H et al. 2014. The segmentations and the significances of the Central Canyon System in the Qiongdongnan Basin, northern South China Sea. Journal of Asian Earth Sciences, 79: 552–563.
Sun Q L, Wu S G, Chen D X et al. 2014. Focused fluid flow systems and their implications for hydrocarbon and gas hydrate accumulations in the deep-water basins of the northern South China Sea. Chinese Journal of Geophysics, 57(12): 4052–4062. (in Chinese with English abstract)
Sun Q L, Wu S G, Lü F L et al. 2010. Polygonal faults and their implications for hydrocarbon reservoirs in the southern Qiongdongnan Basin, South China Sea. Journal of Asian Earth Sciences, 39(5): 470–479.
Tian J, Wu S G, Lv F L et al. 2015. Middle Miocene mound-shaped sediment packages on the slope of the Xisha carbonate platforms, South China Sea: combined result of gravity flow and bottom current. Deep Sea Research Part II: Topical Studies in Oceanography, 122: 172–184.
Turrini L, Jackson C A L, Thompson P. 2017. Seal rock deformation by polygonal faulting, offshore Uruguay. Marine and Petroleum Geology, 86: 892–907.
Victor P, Moretti I. 2006. Polygonal fault systems and channel boudinage: 3D analysis of multidirectional extension in analogue sandbox experiments. Marine and Petroleum Geology, 23(7): 777–789.
Wan S M, Li A C, Xu K H et al. 2008. Characteristics of clay minerals in the northern South China Sea and its implications for evolution of East Asian monsoon since Miocene. Journal of China University of Geosciences, 19(1): 23–37.
Wang X J, Wu S G, Yuan S Q et al. 2010. Geophysical signatures associated with fluid flow and gas hydrate occurrence in a tectonically quiescent sequence, Qiongdongnan Basin, South China Sea. Geofluids, 10(3): 351–368.
Wang Z S, Liu Z, Wang Z F et al. 2014. Distribution characteristics of abnormal pressure in central depression belt, deepwater area, Qiongdongnan (Southeast Hainan) Basin. Acta Geoscientica Sinica, 35(3): 355–364. (in Chinese with English abstract)
Wu S G, Sun Q L, Wu T Y et al. 2009. Polygonal fault and oil-gas accumulation in deep-water area of Qiongdongnan Basin. Acta Petrolei Sinica, 30(1): 22–32. (in Chinese with English abstract)
Xie X N, Müller R D, Li S T et al. 2006. Origin of anomalous subsidence along the northern South China Sea margin and its relationship to dynamic topography. Marine and Petroleum Geology, 23(7): 745–765.
Xie X N, Zhang C, Ren J Y et al. 2011. Effects of Distinct Tectonic Evolutions on Hydrocarbon Accumulation in Northern and Southern Continental Marginal Basins of the South China Sea. Chinese Journal of Geophysics, 54(6): 1097–1111.
Yin X Y, Ren J Y, Lei C. 2010. Geometrical characteristics and formation mechanism of intrastratal faults in the southeast of the Qiongdongnan Basin. Geotectonica et Metallogenia, 34(3): 299–307. (in Chinese with English abstract)
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Supported by the Key Laboratory of Marine Mineral Resources, Ministry of Land and Resources of China (No. KLMMR-2018-B-07), the National Basic Research Program of China (No. 2011ZX05025-006-02), and the National Natural Science Foundation of China (No. 41672206)
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Li, Y., Pu, R., Zhao, X. et al. Differences of polygonal faults related to upper Miocene channels: a case study from the Beijiao sag of Qiongdongnan basin, South China Sea. J. Ocean. Limnol. 41, 84–99 (2023). https://doi.org/10.1007/s00343-021-1249-9
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DOI: https://doi.org/10.1007/s00343-021-1249-9