%0 Book Section
%A Urbancic, Ted
%A Zinno, Richar J.
%A Engineering Seismology Group Canada Inc,
%A Union Pacific Resources Co,
%B SEG Technical Program Expanded Abstracts 1998
%D 1998
%F epos:2168
%I Society of Exploration Geophysicists
%P 964-967
%S SEG Technical Program Expanded Abstracts
%T Cotton Valley Hydraulic Fracture Imaging Project: Feasibility of determining fracturebehavior using microseismic event locations and source parameters
%U https://episodesplatform.eu/eprints/2168/
%X Spatial  distributions  in  event  locations  and  their  sourceparameters  (moment  magnitude,  seismic  moment,  sourceradius,  P-  and  S-wave  seismic  energy  release,  and  staticstress drop) were examined in order to provide insight intothe  geometry  and  fracturing  process  associated  with  theStage  2  Cotton  Valley  (East  Texas)  fracture  treatment  ofMay  14,  1997.    Events  locations  (79),  based  on  P-  and  S-wave  first  arrivals  and  direction  vectors,  were  obtained  toan  accuracy  better  than  24  m  (9  m  on  average).    Spatially,events  occurred  at  two  depths  (2760  m  and  2820  m),  andranged  from  260  m  west  to  330  m  east  of  the  treatmentwell.    The  events,  varying  in  magnitude  from  -1.5  to  -0.5,exhibited   shear   and   non-shear   failure   components,   asobserved   in   the   S-   to   P-wave   seismic   energy   ratios.Additionally,  the  ratios  generally  increased  with  distancefrom  the  treatment  well.    Scaling  in  seismic  momentoutlined self-similar and non-similar trends, likely resultingfrom the presence of fluid.   It is concluded that the analysisof microseismicity and their source characteristics have thepotential  for  outlining  fracture  behavior  in  the  CottonValley.