Publications

Improved microseismic fracture mapping using perforation timing measurements for velocity calibration

Warpinski, Norman R.; Sullivan, Richard B.; Uhl, Jim E.; Waltman, Charles K.; Machovoe, Sean R.

A method is decribed wherein microseismic mapping of hydraulic fractures is improved by using crosswell data to calibrate and/or verify dipole-sonic-velocity data. In the perforation-timing procedure, crosswell-velocity data are obtained by monitoring the firing pulse from the receiver-orientation perforations and recording the timing pulse along with the arrival data. From these results, a simple 1D model of velocities can be extracted and used to validate, refine, or correct the detailed dipole-sonic data or provide a warning of discrepancies. © 2005 Society of Petroleum Engineers.