Location of and Monitoring with Induced Earthquakes in Oil and Gas Fields

B048 Location of and Monitoring with Induced Earthquakes in Oil and Gas Fields S. Sarkar* (Massachusetts Institute of Technology) & M.N. Toksoz (Massachusetts Institute of Technology) SUMMARY We present some developments for location of induced seismic events and apply these to field data. Most commonly used earthquake location algorithms do not work for earthquakes in oil and gas fields. Induced earthquakes generally occur in sedimentary basins with alternating high and low velocity layers. Conventional algorithms based on either smooth velocity gradients or layers with increasing velocities cannot handle many thin layers with high and low velocities. In this paper we