基于Matlab的偏振分析在微地震三维定位中的应用
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摘要
当前微地震震源定位软件多数是基于时差定位算法,其根据是检波器测得的p波或s波的到时,而偏振分析法多数应用在对检波器测到的微地震波形去噪声。其实同样可以根据p波振幅在空间上的三分量对震源定位,其原理是根据p波的振动方向与传播方向相同,从而确定震源相对于台站的空间位置,在台站点与震源点之间就可以得到一条唯一确定的方向射线,显然所有方向射线的交点即为震源点位置。结合Matlab软件在矩阵计算上的优势,可以体现出偏振分析定位算法在计算速度和定位精度上的优势,其实用性比较强。根据模拟演算可以验证偏振分析定位方法能够在一定的精度范围内确定微地震事件的位置,为定位方法提供了另一种研究思路。
Microseismic Source location software is mainly based on the TDOA location algorithm using P-wave or S-wave travel time measured by detector.The polarization analysis is often used to the seismic waveform noise eliminating measured by detector.In fact,the microseismic source can be determined according to the three-component of p-wave vibration in the space station.Only the direction of one ray can be obtained from station sites to the position of source,according to the principle of the same direction of vibration and propagation of p-wave to determine the space location of the station sites from the vibration source.It is clear that the intersection in all directions-ray position is the focal point.In Combination of the advantages of Matlab software in the matrix calculation,polarization analysis can reflect the advantages of the calculation speed and positioning accuracy with relatively strong practical application.According to the simulation algorithm,the polarization analysis method can be used to locate the position of micro-seismic events within the range of accuracy,thus providing another research direction for the positioning method.
Microseismic Source location software is mainly based on the TDOA location algorithm using P-wave or S-wave travel time measured by detector.The polarization analysis is often used to the seismic waveform noise eliminating measured by detector.In fact,the microseismic source can be determined according to the three-component of p-wave vibration in the space station.Only the direction of one ray can be obtained from station sites to the position of source,according to the principle of the same direction of vibration and propagation of p-wave to determine the space location of the station sites from the vibration source.It is clear that the intersection in all directions-ray position is the focal point.In Combination of the advantages of Matlab software in the matrix calculation,polarization analysis can reflect the advantages of the calculation speed and positioning accuracy with relatively strong practical application.According to the simulation algorithm,the polarization analysis method can be used to locate the position of micro-seismic events within the range of accuracy,thus providing another research direction for the positioning method.
引文
[1]史红,成云海,王存文.基于微地震监测技术的岩体失稳研究及其进展[J].金属矿山,2008(6):1-5.
[2]李继东,刘彬辉,赵新国,等.三分量数字检波器在东濮凹陷的采集效果分析[J].石油物探,2006,45(6):652-655.
[3]逢焕东,姜福兴.微地震监测中传感器的布置方法[J].有色金属,2003,55(6):21.
[4]张山,刘清林,赵群,等.微地震监测技术在油田开发中的应用[J].中国石化石油物探,2006,41(2):227-231.
[2]李继东,刘彬辉,赵新国,等.三分量数字检波器在东濮凹陷的采集效果分析[J].石油物探,2006,45(6):652-655.
[3]逢焕东,姜福兴.微地震监测中传感器的布置方法[J].有色金属,2003,55(6):21.
[4]张山,刘清林,赵群,等.微地震监测技术在油田开发中的应用[J].中国石化石油物探,2006,41(2):227-231.
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