Microseismic moment-tensor inversion and sensitivity analysis in vertically transverse isotropic media
文献类型：期刊论文
| 作者 | Li, Han1,3; Chang, Xu1,3; Xie, Xiao-Bi2; Wang, Yibo1,3 |
| 刊名 | GEOPHYSICS
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| 出版日期 | 2021-03-01 |
| 卷号 | 86期号:2页码:KS23-KS36 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2020O98.1 |
| 英文摘要 | Through the study of microseismic focal mechanisms, infor-mation such as fracture orientation, event magnitude, and in situ stress status can be quantitatively obtained, thus providing a re-liable basis for unconventional oil and gas exploration. Most source inversion methods assume that the medium is isotropic. However, hydraulic fracturing is usually conducted in sedimen-tary rocks, which often exhibit strong anisotropy. Neglecting this anisotropy may cause errors in focal mechanism inversion results. We have developed a microseismic focal mechanism in-version method that considers velocity anisotropy in a vertically transverse isotropic medium. To generate synthetic data, we adopt the moment-tensor model to represent microearthquake sources. We use a staggered-grid finite-difference method to cal-culate synthetic seismograms in anisotropic media. We perform seismic moment-tensor (SMT) inversion with only P-waves by matching the synthetic and observed waveforms. The synthetic and field data sets are used to test the inversion method. For the field data set, we investigate the inversion stability using ran-domly selected partial data sets in the calculation. We pay spe-cial attention to analyze the sensitivity of the inversion. We test and evaluate the impact of noise in the data and errors in the model parameters (VP0, epsilon, and delta) on the SMT inversion using synthetic data sets. The results indicate that, for a surface acquis-ition system, our method can tolerate moderate noise in the data and deviations in the anisotropy parameters can cause errors in the SMT inversion, especially for dip-slip events and the in-verted percentages of non-double-couple (DC) components. Ac-cording to our study, including anisotropy in the model is important to obtain reliable non-DC components of moment tensors for hydraulic fracturing-induced microearthquakes.
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| WOS关键词 | DOUBLE-COUPLE EARTHQUAKES ; SOURCE MECHANISMS ; WAVE PROPAGATION ; HETEROGENEOUS MEDIA ; WEST BOHEMIA ; FAULT ; ROCK ; MICROEARTHQUAKES ; ANISOTROPY ; SURFACE |
| 资助项目 | National Natural Science Foundation of China[41974156] ; National Natural Science Foundation of China[41804050] ; China National Petroleum Corporation |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000668576300005 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101922]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Chang, Xu |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 2.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA 3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Han,Chang, Xu,Xie, Xiao-Bi,et al. Microseismic moment-tensor inversion and sensitivity analysis in vertically transverse isotropic media[J]. GEOPHYSICS,2021,86(2):KS23-KS36. |
| APA | Li, Han,Chang, Xu,Xie, Xiao-Bi,&Wang, Yibo.(2021).Microseismic moment-tensor inversion and sensitivity analysis in vertically transverse isotropic media.GEOPHYSICS,86(2),KS23-KS36. |
| MLA | Li, Han,et al."Microseismic moment-tensor inversion and sensitivity analysis in vertically transverse isotropic media".GEOPHYSICS 86.2(2021):KS23-KS36. |
入库方式： OAI收割
来源：地质与地球物理研究所
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