摘要
对Semblance叠加公式进行了扩展,考虑了震源机制及其求解过程,开发了微破裂向量扫描技术,在开发区使用地震台网扫描地下空间破裂活动释放的能量,以适应地表监测微破裂时信噪比较低、地下微破裂多为剪切错动的特性。类似于开发区观测环境的算例结果表明,当信噪比降低至0.5时,人们仍可辨别破裂能量释放点,并估计破裂的震源机制。由此可知,利用不影响生产的、稀疏的、三分量的地震台网在地表监测开发区的地下破裂并使用微破裂向量扫描处理技术是可行的。
A vector scanning technique for micro-fractures was developed on the basis of seismic mechanism and Semblance addition to adapt the lower signal-to-noise ratio observed on surface and many slip fractures in production regions.The studied case similar to observation environment shows that the fracture points can still be identified in space and time even though the ratio is 0.5,and the seismic mechanism can be estimated through the scanning.It is feasible to monitor the fracture activities using the seismic network with independent, 3-component, sparse distribution and the processing method.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2009年第5期744-748,共5页
Acta Petrolei Sinica
关键词
微破裂监测
被动源地震
向量扫描
震源机制
信噪比
micro-fracture monitoring
passive seismic
vector scanning technique
seismic mechanism
signal-to-noise ratio
