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Tectonic and geological setting of the earthquake hazards in the Changning shale gas development zone, Sichuan Basin, SW China
Received date: 2019-06-01
Revised date: 2019-06-20
Online published: 2019-10-22
Supported by
Supported by the National Natural Science Foundation of China(41430316);Supported by the National Natural Science Foundation of China(40739906);Supported by the National Natural Science Foundation of China(41272237)
Hydraulic fracturing is a key technology in shale gas extraction, whether hydraulic fracturing induces earthquakes has become a hot topic in the public and the focus of scholars' research. The urgency of shale gas mining and the catastrophic nature of earthquakes highlight the urgent need to study this issue. The Changning anticline at the southern margin of the Sichuan Basin is a key area for shale gas exploitation. Taking this as an example, this paper applies the velocity model of the study area to reposition the M5.7 magnitude earthquake on December 16, 2018 and the M5.3 magnitude earthquake on January 03, 2019 and their aftershock sequence in this area. Using shale gas exploration drilling and reflection seismic data to carry out structural analysis, and recovering the tectonic geological setting of earthquake occurrence by restoring the formation process of the Changning anticline, to further explore the seismic mechanism. Our results show that the Changning anticline is a large basement fault-bend fold, and the displacement of the fault forming the anticline is 18 km, and the Changning anticline absorbs 33% of the fault slip. The Silurian Longmaxi Formation of the Changning anticline experienced larger-parallel shearing along underlying basement faults, forming a micro-fracture system. The footwall ramp of the basement fault is reactivated at present, earthquakes in this area mostly occur along the footwall ramp of the basement fault and above and below it. The anticlinal and synclinal hinge zones are also the earthquake concentration areas, but the earthquake magnitude decreases upwards along the kink-band, and small earthquakes below M2.0 occur in the Silurian Longmaxi Formation. So far, the earthquake in the Changning anticline mainly occurred in the southern limb of the anticline, which is a natural earthquake formed along the footwall ramp of the basement fault. The earthquakes in the Changning area are possible related to the geo-tectonic setting for the southeast outward compression of the Qinghai-Tibet Plateau at present, the moderate or large-scale earthquakes in the southwest Sichuan Basin are mainly due to the reactivation during late Quaternary of the earlier formed faults. It is suggested to carry out scientific monitoring of seismic activities in shale gas development zones.
Dengfa HE , Renqi LU , Hanyu HUANG , Xiaoshan WANG , Hua JIANG , Weikang ZHANG . Tectonic and geological setting of the earthquake hazards in the Changning shale gas development zone, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2019 , 46(5) : 1051 -1064 . DOI: 10.1016/S1876-3804(19)60262-4
| [1] | ATKINSON G M, EATON D W, GHOFRANI H , et al. Hydraulic fracturing and seismicity in the western Canada sedimentary basin. Seismological Research Letters, 2016,87(3):631-647. |
| [2] | BAO X, EATON D W . Fault activation by hydraulic fracturing in western Canada. Science, 2016,354(6318):1406-1409. |
| [3] | LEI X, MA S, CHEN W , et al. A detailed view of the injection- induced seismicity in a natural gas reservoir in Zigong, southwestern Sichuan Basin, China. Journal of Geophysical Research: Solid Earth, 2013,118(8):4296-4311. |
| [4] | LEI X, HUANG D, SU J , et al. Fault reactivation and earthquakes with magnitudes of up to Mw4. 7 induced by shale-gas hydraulic fracturing in Sichuan Basin, China. Scientific Reports, 2017,7(1):7971. |
| [5] | MENG L, MCGARR A, ZHOU L , et al. An investigation of seismicity induced by hydraulic fracturing in the Sichuan Basin of China based on data from a temporary seismic network. Bulletin of the Seismological Society of America, 2019,109(1):348-357. |
| [6] | SKOUMAL R J, BRUDZINSKI M R, CURRIE B S . Earthquakes induced by hydraulic fracturing in Poland Township, Ohio. Bulletin of the Seismological Society of America, 2015,105(1):189-197. |
| [7] | SKOUMAL R J, RIES R, BRUDZINSKI M R , et al. Earthquakes induced by hydraulic fracturing are pervasive in Oklahoma. Journal of Geophysical Research: Solid Earth, 2018,123(12):10918-10935. |
| [8] | RUBINSTEIN J L, MAHANI A B . Myths and facts on wastewater injection, hydraulic fracturing, enhanced oil recovery, and induced seismicity. Seismological Research Letters, 2015,86(4):1060-1067. |
| [9] | WANG Yipeng, MA Jin, LI Chuanyou . The migration characteristics of strong earthquakes on the North-South Seismic Belt and its relation with the South Asia Seismic Belt. Earthquake Research in China, 2007,29(1):1-14. |
| [10] | WANG Xiaoshan, LYU Jian, XIE Zujun , et al. Focal mechanisms and tectonic stress field in the North-South Seismic Belt of China. Chinese Journal of Geophysics, 2015,58(11):4149-4162. |
| [11] | WANG Chunyong, YANG Wencai, WU Jianping , et al. Study on the lithospheric structure and earthquakes in North-South Tectonic Belt. Chinese Journal of Geophysics, 2015,58(11):3867-3901. |
| [12] | DENG Qidong, ZHANG Peizhen, RAN Yongkang , et al. Active tectonics and earthquake activities in China. Earth Science Frontiers, 2003,10(S1):66-73. |
| [13] | DENG Qidong, WEN Xueze . A review on the research of active tectonics: History, progress and suggestions. Seismology and Geology, 2008,30(1):1-30. |
| [14] | XU Xiwei, HAN Zhujun, YANG Xiaoping , et al. Seismic tectonic maps in China and adjacent areas. Beijing: Seismological Press, 2016. |
| [15] | XU Xiwei, GUO Tingting, LIU Shaozhuo , et al. Discussion on issues associated with setback distance from active fault. Seismology and Geology, 2016,38(3):477-502. |
| [16] | GU Gongxu. Catalogue of Chinese earthquakes, 1831BC— 1969AD. Beijing: Seismological Press, 1983. |
| [17] | WALDHAUSER F, ELLSWORTH W L . A double-difference earthquake location algorithm: Method and application to the Northern Hayward Fault, California. Bulletin of Seismology Society America, 2000,90(6):1353-1368. |
| [18] | HAUKSSON E, SHEARER P . Southern California hypocenter relocation with waveform cross-correlation, Part 1: Results using the double-difference method. Bulletin of Seismology Society America, 2005,95(3):896-903. |
| [19] | WANG M, HUBBARD J, PLESCH A , et al. Three-dimensional seismic velocity structure in the Sichuan basin, China. Journal of Geophysical Research: Solid Earth, 2016,121(2):1007-1022. |
| [20] | ZHAO Zhu, ZHANG Runsheng . Primary study of crustal and upper mantle velocity structure of Sichuan Province. Acta Seismologica Sinica, 1987,9(2):154-166. |
| [21] | China Earthquake Networks Center. China Earthquake Networks Center. (2019-06-13)[2019-06-15]. |
| [22] | Global CMT Catalog Search. Global CMT Catalog Search. ( 2019 -06-13)[2019-06-15]. |
| [23] | TONG Chongguang. Tectonic evolution and oil-gas accumulation in Sichuan Basin. Beijing: Geological Publishing House, 1992. |
| [24] | GUO Zhengwu, DENG Kangling, HAN Yonghui. Formation and evolution of Sichuan Basin. Beijing: Geological Publishing House, 1996. |
| [25] | HE Dengfa, LI Desheng, ZHANG Guowei , et al. Formation and evolution of multi-cycle superposed Sichuan Basin, China. Chinese Journal of Geology, 2011,46(3):589-606. |
| [26] | DENG Bin, YONG Ziquan, LIU Shugen , et al. Cenozoic mountain- building processes in the Daliangshan, southeastern margin of the Tibetan Plateau: Evidence from low-temperature thermochronology and thermal modeling. Chinese Journal of Geophysics, 2016,59(6):2162-2175. |
| [27] | QIN Zuopeng, LIU Shugen, DENG Bin , et al. Multiphase structural features and evolution of southeast Sichuan tectonic belt in China. Journal of Chengdu University of Technology (Science & Technology Edition), 2013,40(6):703-711. |
| [28] | HUANG H Y, HE D F, LI Y Q , et al. Silurian tectonic-sedimentary setting and basin evolution in the Sichuan area, southwest China: Implications for palaeogeographic reconstructions. Marine and Petroleum Geology, 2018,92:403-423. |
| [29] | WANG Yuman, HUANG Jinliang, WANG Shufang , et al. Dissection of two calibrated areas of the Silurian Longmaxi Formation, Changning and Jiaoshiba, Sichuan Basin. Natural Gas Geoscience, 2016,27(3):423-432. |
| [30] | DING Wenlong, ZENG Weite, WANG Ruyue , et al. Method and application of tectonic stress field simulation and fracture distribution prediction in shale reservoir. Earth Science Frontiers, 2016,23(2):63-74. |
| [31] | FAN Cunhui, LI Hu, ZHONG Cheng . Tectonic fracture stages and evolution model of Longmaxi Formation shale, Dingshan structure, Southeast Sichuan. Acta Petrolei Sinica, 2018,39(4):379-390. |
| [32] | JOHN S . Fluid overpressures and strength of the sedimentary upper crust. Journal of Structural Geology, 2014,69:481-492. |
| [33] | LI Xiaying, LEI Xinglin, LI Qi , et al. Characteristics of acoustic emission during deformation and failure of typical reservoir rocks under triaxial compression: An example of Sinian dolomite and shale in the Sichuan Basin. Chinese Journal of Geophysics, 2015,58(3):982-992. |
| [34] | ELLSWORTH W L . Injection-induced earthquake. Science, 2013, 341: 1225942-1-7. |
| [35] | LAI Guijuan, JIANG Changsheng, BI Jinmeng , et al. Industrial mining induced earthquakes(Ⅰ): Mechanisms and influencing factors. Recent Developments in World Seismology, 2019,5:6-10. |
| [36] | YANG H F, LIU Y J, WEI M , et al. Induced earthquakes in the development of unconventional energy resources. SCIENCE CHINA Earth Sciences, 2017,60(9):1632-1644. |
| [37] | USGS. Induced earthquakes, myths and misconceptions. ( 2019 -06-13)[2019-06-15]. |
| [38] | GAN W J, ZHANG P Z, SHEN Z K , et al. Present-day crustal motion within the Tibetan Plateau inferred from GPS measurements. Journal of Geophysical Research: Solid Earth, 2007,112(B8):B08416-B08426. |
| [39] | LU R Q, LIU Y D, XU X W , et al. Three-dimensional model of the lithospheric structure under the eastern Tibetan Plateau: Implications for the active tectonics and seismic hazards. Tectonics, 2019. 38(4):1292-1307. |
| [40] | LI Y Q, LU R Q, HE D F , et al. Transformation of coseismic faults in the northern Longmenshan tectonic belt, eastern Tibetan Plateau: Implications for potential earthquakes and seismic risks. Journal of Asian Earth Sciences, 2019,177(15):66-75. |
| [41] | LU R Q, HE D F, XU X W , et al. Geometry and kinematics of buried structures in the piedmont of the central Longmen Shan: Implication for the growth of the Eastern Tibetan Plateau. Journal of the Geological Society, 2019,176(2):323-333. |
| [42] | LU R Q . The basement structures beneath the central segment of Longmen Shan: Constraints on the uplifting in the southeast margin of Qinghai-Tibet Plateau since the Cenozoic. Journal of Asian Earth Sciences, 2016,117:73-81. |
| [43] | LU R, HE D, JOHN S , et al. Structural model of the central Longmen Shan thrusts using seismic reflection profiles: Implications for the sediments and deformations since the Mesozoic. Tectonophysics, 2014,630:43-53. |
| [44] | LU R Q, HE D F, JOHN S , et al. Structural model of the central Longmen Shan thrusts using seismic reflection profiles: Implications for the sediments and deformations since the Mesozoic. Tectonophysics, 2014,630:43-53. |
| [45] | ZHANG Guowei, GUO Anlin, WANG Yuejun , et al. Tectonics of South China continent and its implications. SCIENCE CHINA Earth Sciences, 2013,56(11):1804-1828. |
| [46] | WU Zhonghai . Active faults: Terminology, research advances, and thinking on some problems. Journal of Earch Sciences and Environment, 2018,40(6):706-726. |
| [47] | WELLS D L, COPPERSMITH K J . New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement. Bulletin of the seismological Society of America, 1994,84(4):974-1002. |
| [48] | LEONARD M . Earthquake fault scaling: Self-consistent relating of rupture length, width, average displacement, and moment release. Bulletin of the Seismological Society of America, 2010,100(5A):1971-1988. |
| [49] | LU R Q, HE D F, JOHN S , et al. The seismogenic structure of the 2010 Suining Ms 5.0 earthquake and its geometry, kinematics and dynamics analysis. Acta Geologica Sinica (English Edition), 2011,85(6):1277-1285. |
| [50] | HE D F, LU R Q, JOHN S . Geometry and kinematics of structural deformation in the transitional belt between the Longmenshan Mountains and the Sichuan Basin, and implications for earthquake risk appraisals. Recent Developments in World Seismology, 2010,6:4-5. |
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