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微地震震源定位方法综述 被引量:9
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作者 达姝瑾 李学贵 +1 位作者 董宏丽 李含阳 《吉林大学学报(地球科学版)》 EI CAS CSCD 北大核心 2020年第4期1228-1239,共12页
微地震震源定位方法是微地震监测领域的一项核心技术,而考量微地震技术应用效果好坏的准则在于震源定位方法的精确程度。针对非常规油气开发过程中微地震震源定位方法的应用,本文对微地震震源定位方法进行阐述。其中:几何作图法具有稳... 微地震震源定位方法是微地震监测领域的一项核心技术,而考量微地震技术应用效果好坏的准则在于震源定位方法的精确程度。针对非常规油气开发过程中微地震震源定位方法的应用,本文对微地震震源定位方法进行阐述。其中:几何作图法具有稳健、效率高的优势,但震源位置较深时定位精度较低;线性定位法无需速度模型精度,但对初至拾取的精度有较大影响;非线性定位法对初至拾取较为敏感,对速度模型的精度要求较高,但计算量较小;混合优化定位法在一定程度上提高了定位的精度和效率,但在低信噪比、速度模型精度较低时优势不明显;基于波形偏移的定位方法无需考虑初至拾取的精度,但计算量较大;基于神经网络的定位方法采用训练网络进行训练,定位精度高,误差小。同时,本文还介绍了多方法多参数信息融合技术在油气藏微震震源定位中的应用。 展开更多
关键词 地震 多信息融合 微地震震源定位 非常规油气开发
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多种群遗传算法在微震震源定位中的应用 被引量:14
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作者 王泉栋 李国和 +3 位作者 吴卫江 洪云峰 刘智渊 程远 《计算机测量与控制》 2015年第4期1285-1288,共4页
微震震源的精确和快速定位对坑道安全的预测至关重要;在设定均质均速模型条件下,两两检波器的观测走时和计算走时的拟合差绝对值之和为适应度函数,把微震震源定位转换为求解优化问题;采用格雷码对震源位置进行编码,提高了遗传算法的局... 微震震源的精确和快速定位对坑道安全的预测至关重要;在设定均质均速模型条件下,两两检波器的观测走时和计算走时的拟合差绝对值之和为适应度函数,把微震震源定位转换为求解优化问题;采用格雷码对震源位置进行编码,提高了遗传算法的局部搜索能力;同时采用两个群体独立进化,分别利用轮盘和排序方法从两个群体中选择优秀个体,将各种群中的优秀个体进行交叉运算和变异产生新的个体,从而提高了遗传算法的全局搜索能力;通过实验证实优化后的遗传算法在微震震源定位中具有较高的性能和精度。 展开更多
关键词 矿区 微地震震源定位 多种群遗传算法 格雷码
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Weighted-elastic-wave interferometric imaging of microseismic source location 被引量:4
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作者 李磊 陈浩 王秀明 《Applied Geophysics》 SCIE CSCD 2015年第2期221-234,275,共15页
Knowledge of the locations of seismic sources is critical for microseismic monitoring. Time-window-based elastic wave interferometric imaging and weighted- elastic-wave (WEW) interferometric imaging are proposed and... Knowledge of the locations of seismic sources is critical for microseismic monitoring. Time-window-based elastic wave interferometric imaging and weighted- elastic-wave (WEW) interferometric imaging are proposed and used to locate modeled microseismic sources. The proposed method improves the precision and eliminates artifacts in location profiles. Numerical experiments based on a horizontally layered isotropic medium have shown that the method offers the following advantages: It can deal with Iow-SNR microseismic data with velocity perturbations as well as relatively sparse receivers and still maintain relatively high precision despite the errors in the velocity model. Furthermore, it is more efficient than conventional traveltime inversion methods because interferometric imaging does not require traveltime picking. Numerical results using a 2D fault model have also suggested that the weighted-elastic-wave interferometric imaging can locate multiple sources with higher location precision than the time-reverse imaging method. 展开更多
关键词 Microseismic monitoring seismic source location elastic wave interferometric imaging time-reverse imaging
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Locating microseismic sources based upon L-shaped single-component geophone array:A synthetic study 被引量:2
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作者 DING Liang LIU Qin-ya +2 位作者 GAO Er-gen QIAN Wei SUN Shou-cai 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第9期2711-2725,共15页
We have developed a type of L-shaped single-component geophone array as a single station(L-array station)for surface microseismic monitoring.The L-array station consists of two orthogonal sensor arrays,each being a li... We have developed a type of L-shaped single-component geophone array as a single station(L-array station)for surface microseismic monitoring.The L-array station consists of two orthogonal sensor arrays,each being a linear array of single-component sensors.L-array stations can be used to accurately estimate the polarization of first arrivals without amplitude picking.In a synthetic example,we first use segmentally iterative ray tracing(SIRT)method and forward model to calculate the travel time and polarization of first arrivals at a set of L-array stations.Then,for each L-array station,the relative delay times of first arrivals along sensor arrays are used to estimate the polarization vector.The small errors in estimated polarization vectors show the reliability and robustness of polarization estimation based on L-array stations.We then use reverse-time ray-tracing(RTRT)method to locate the source position based on estimated polarizations at a set of L-array stations.Very small errors in inverted source location and origin time indicate the great potential of L-array stations for source localization applications in surface microseismic monitoring. 展开更多
关键词 geophone array polarization source location seismic monitoring
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