水库蓄水与断层带流体孔隙压时-空分布的数值模拟——以紫坪铺水库为例

doi:10.3969/j.issn.0253-4967.2015.02.013

地震地质 ›› 2015, Vol. 37 ›› Issue (2): 510-523.DOI: 10.3969/j.issn.0253-4967.2015.02.013

水库蓄水与断层带流体孔隙压时-空分布的数值模拟——以紫坪铺水库为例

杨彧^1,2, 杨晓松¹, 段庆宝¹

1. 中国地震局地质研究所, 地震动力学国家重点实验室北京 100029;
2. HPT Laboratory, Department of Earth Sciences, Utrecht University, 3584 CD Utrecht, The Netherlands

收稿日期:2014-01-28 修回日期:2014-06-22 出版日期:2015-06-20 发布日期:2015-08-19
通讯作者: 杨晓松,男,研究员,E-mail:xsyang@ies.ac.cn
作者简介:杨彧,女,1987年生,2014年于中国地质大学(北京)获矿床学专业硕士学位,目前为荷兰Utrecht大学岩石物理及岩石力学专业在读博士研究生,电话:+31-0681836909,E-mail:y.yang@uu.nl。
基金资助:
地震动力学国家重点实验室自主研究课题(LED2010A03)、地震行业科研专项(201508018)和国家自然科学基金(41372202)共同资助。

NUMERICAL SIMULATION OF TEMPORAL-SPATIAL DISTRIBUTION OF PORE-FLUID PRESSURE INDUCED BY ZIPINGPU RESERVOIR IMPOUNDMENT

YANG Yu^1,2, YANG Xiao-song¹, DUAN Qing-bao¹

1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. HPT Laboratory, Department of Earth Sciences, Utrecht University, 3584 CD Utrecht, The Netherlands

Received:2014-01-28 Revised:2014-06-22 Online:2015-06-20 Published:2015-08-19

摘要/Abstract

摘要：

通过对汶川地震破裂带上的断层岩及围岩的渗透率测量, 获得了研究区岩石的渗透率随深度变化的规律。依据所得到的渗透率实验数据, 数值模拟了紫坪铺水库蓄水所产生的流体孔隙压的时空分布。模拟结果显示, 渗透率是否随深度变化, 其流体孔隙压的模拟结果也相差很大。由于断层带具有高渗的特点, 因此与水库底部存在水力联系的断层带及其宽度对流体渗透的模拟结果有明显的影响。断层带越宽, 下渗作用越明显, 流体孔隙压的分布与断层带的产状越接近。若断层带宽度为100~300m, 2008年汶川M_S8.0地震发生时, 其震源区的流体孔隙压为0.1~0.15MPa, 与库体载荷在断层面上产生的附加正应力相当。该模拟结果可以作为进一步分析汶川地震的发生是否与紫坪铺水库蓄水存在关联的重要约束。

关键词: 紫坪铺水库蓄水, 汶川地震, 流体渗透数值模拟, 流体孔隙压时空分布, 渗透率实验

Abstract:

The depth dependence of permeabilities of the fault rocks collected from the ruptures of 2008 Wenchuan earthquake and their host rocks were experimentally determined. On the basis of the measurement data, the temporal-spatial distributions of pore-fluid pressure induced by Zipingpu reservoir impoundment were numerically simulated. Modeled results indicate that the pore-fluid pressure is closely related to the patterns of the permeabilities. In other words, the results with the depth dependent permeabilities are strikingly different from those with the constant permeabilities. Existence of a fault hydro-dynamically connecting to the bottom of reservoir has a significant influence on the simulation of fluid infiltration owing to higher permeability in fault zones. The wider the fault zone is, the more obvious of fluid infiltrating along the fault. If fault width ranges from 100m to 300m, the pore-fluid pressure in the hypocenter region is about 0.1~0.15MPa, which is comparable with the normal stress caused by the reservoir impoundment on fault zone near the hypocenter of 2008 Wenchuan earthquake. This simulation provides an important constraint on the studies associated with the potential relationship between Zipingpu reservoir impoundment and Wenchuan earthquake.

Key words: Zipingpu Reservoir impoundment, Wenchuan earthquake, fluid infiltration, numerical simulation, temporal-spatial distribution of pore-fluid pressure

中图分类号:

P315.9

杨彧, 杨晓松, 段庆宝. 水库蓄水与断层带流体孔隙压时-空分布的数值模拟——以紫坪铺水库为例[J]. 地震地质, 2015, 37(2): 510-523.

YANG Yu, YANG Xiao-song, DUAN Qing-bao. NUMERICAL SIMULATION OF TEMPORAL-SPATIAL DISTRIBUTION OF PORE-FLUID PRESSURE INDUCED BY ZIPINGPU RESERVOIR IMPOUNDMENT[J]. SEISMOLOGY AND GEOLOGY, 2015, 37(2): 510-523.

参考文献

陈颙. 2009. 汶川地震是由水库蓄水引起的吗? 【J】. 中国科学(D辑), 39(3): 257—259.
CHEN Yong. 2009. Did the reservoir impoundment trigger the Wenchuan earthquake? 【J】. Science in China(Ser D), 52(4): 431—433.
胡先明, 张永久, 谢蓉华, 等. 2009. 紫坪铺水库区小地震震源机制研究【J】. 地震地质, 31(4): 676—685. doi: 10.3969/j.issn.0253-4967.2009.04.011.
HU Xian-ming, ZHANG Yong-jiu, XIE Rong-hua, et al. 2009. Research on focal mechanism of small earthquakes in Zipingpu reservoir area 【J】. Seismology and Geology, 31(4): 676—685(in Chinese).
雷兴林, 马胜利, 闻学泽, 等. 2008. 地表水体对断层应力与地震时空分布影响的综合分析: 以紫坪铺水库为例【J】. 地震地质, 30(4): 1046—1064.
LEI Xing-lin, MA Sheng-li, WEN Xue-ze, et al. 2008. Integrated analysis of stress and regional seismicity by surface loading: A case study of Zipingpu Reservoir 【J】. Seismology and Geology, 30(4): 1046—1064(in Chinese).
刘保金, 杨晓平, 酆少英, 等. 2008. 龙门山山前疑似汶川M_S8.0地震地表破裂的浅层地震反射调查【J】. 地震地质, 30(4): 906—916.
LIU Bao-jin, YANG Xiao-ping, FENG Shao-ying, et al. 2008. Exploration of suspected surface rupture of the M_S8.0 Wenchuan earthquake at frontal areas of Longmenshan using shallow seismic reflection 【J】. Seismology and Geology, 30(4): 906—916(in Chinese).
刘远征, 马瑾, 马文涛, 2014. 探讨紫坪铺水库在汶川地震发生中的作用【J】. 地学前缘, 21: 150—160.
LIU Yuan-zheng, MA Jin, MA Wen-tao. 2014. The role of the Zipingpu reservoir in the generation of the Wenchuan earthquake 【J】. Earth Science Frontiers, 21: 150—160(in Chinese).
马文涛, 徐长朋, 张新东, 等. 2011. 紫坪铺水库与汶川地震关系的讨论【J】. 地震地质, 33(1): 175—191. doi: 10. 3969 /j. issn. 0253-4967. 2011. 01. 017.
MA Wen-tao, XU Chang-peng, ZHANG Xin-dong, et al. 2011. Study on the relationship between the reservoir-induced seismicity at Zipingpu reservoir and the M_S8.0 Wenchuan earthquake 【J】. Seismology and Geology, 33(1): 175—191(in Chinese).
任俊杰, 孙鑫哲, 丁锐, 等. 2012. 基于高程测量控制点和工程破坏对汶川地震都江堰段地表破裂特征的重新界定【J】. 大地测量与地球动力学, 32: 37—40.
REN Jun-jie, SUN Xin-zhe, DING Rui, et al. 2012. Determination of surface rupture characteristics of Wenchuan earthquake at Dujiangyan segment based on elevation controlling points and engineering damage 【J】. Journal of Geodesy and Geodynamics, 32: 37—40(in Chinese).
徐锡伟, 闻学泽, 叶建青, 等. 2008. 汶川M_S8.0地震地表破裂带及其发震构造【J】. 地震地质, 30(3): 597—629.
XU Xi-wei, WEN Xue-ze, YE Jian-qing, et al. 2008. The M_S8. 0 Wenchuan earthquake surface ruptures and its seismogenic structure 【J】. Seismology and Geology, 30(3): 597—629(in Chinese).
杨清源, 胡毓良, 陈献程. 1996. 国内外水库诱发地震目录【J】. 地震地质, 18(4): 453—461.
YANG Qing-yuan, HU Yu-liang, CHEN Xian-cheng, et al. 1996. Catalogue of reservoir induced seismic events in the world 【J】. Seismology and Geology, 18(4): 453—461(in Chinese).
周斌, 薛世峰, 邓志辉, 等. 2010. 水库诱发地震时空演化与库水加卸载及渗透过程的关系: 以紫坪铺水库为例【J】. 地球物理学报, 53: 2651—2670.
ZHOU Bin, XUE Shi-feng, DENG Zhi-hui, et al. 2010. Relationship between the evolution of reservoir-induced seismicity in space-time and the process of reservoir water body load-unloading and water infiltration: A case study of Zipingpu reservoir 【J】. Chinese J Geophys, 53: 2651—2670(in Chinese).
Bell M L, Nur A. 1978. Strength changes due to reservoir-induced pore pressure and stresses and application to Lake Oroville 【J】. J Geophys Res, 83: 4469—4483.
Biot M A. 1941. General theory of three-dimensional consolidation 【J】. J Appl Phys, 12: 155—164.
Christensen N I. 1996. Poisson's ratio and crustal seismology 【J】. J Geophys Res, 101: 3139—3156.
Deng K, Zhou S, Wang R, et al. 2010. Evidence that the 2008 M_W7.9 Wenchuan earthquake could not have been induced by the Zipingpu reservoir 【J】. Bull Seism Soc Am, 10: 2805—2814.
Gahalaut K, Gahalaut V K. 2010. Effect of the Zipingpu reservoir impoundment on the occurrence of the 2008 Wenchuan earthquake and local seismicity 【J】. Geophysical Journal International, 183: 277—285.
Ge S M, Liu M, Lu N, et al. 2009. Did the Zipingpu Reservoir trigger the 2008 Wenchuan earthquake? 【J】. Geophys Res Lett, 36: L20315. doi: 10.1029/2009GL040349.
Lei X. 2011. Possible roles of the Zipingpu Reservoir in triggering the 2008 Wenchuan earthquake 【J】. J Asian Earth Sci, 40: 844—854.
Li S L, Lai X L, Yao Z X, et al. 2009. Fault zone structures of northern and southern portions of the main central fault generated by the 2008 Wenchuan earthquake using fault zone trapped waves 【J】. Earthquake Sci, 22: 417—424.
Rice J R, Cleary M P. 1976. Some basic stress diffusion solution for fluid-saturated elastic porous media with compressible constitutes 【J】. Rev Geophys Space Phys, 14: 227—291.

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水库蓄水与断层带流体孔隙压时-空分布的数值模拟——以紫坪铺水库为例

NUMERICAL SIMULATION OF TEMPORAL-SPATIAL DISTRIBUTION OF PORE-FLUID PRESSURE INDUCED BY ZIPINGPU RESERVOIR IMPOUNDMENT

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