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Using High-Resolution Reflection Previous HitSeismicNext Hit To Image Free Previous HitPhaseNext Hit DNAPL'S At the M-Area, Savannah River Site


One of the most difficult problems in designing a remediation plan for cleaning up DNAPL contamination is locating the "pools" of free Previous HitphaseNext Hit DNAPL. The modeling of a DNAPL saturated sand verses a water saturated sand suggests with 120Hz frequencies or higher there would be an AVO anomaly. Acquisition parameters for imaging the DNAPL was derived from an AVO model, which was based upon previously acquired Previous HitseismicNext Hit and well data. This would allow the data set to be processed using AVO techniques. The Previous HitseismicNext Hit line was located in such a manner that it started in area where the unconsolidated sand was water filled and crossed a known pool of free Previous HitphaseNext Hit DNAPL saturated sand and continue back into a water saturated sand. Using a weighted stacking processing technique ( Smith and Gidlow, 1987) a fluid factor stack was generated from the data set. The results from the fluid factor stack indicated an anomaly at the depth and location of the known free Previous HitphaseNext Hit DNAPL plume. The initial results suggest that under certain conditions, free Previous HitphaseNext Hit DNAPL can be imaged using high resolution reflection Previous HitseismicNext Hit if there is enough free Previous HitphaseTop product in the ground.

AAPG Search and Discovery Article #91021©1997 AAPG Annual Convention, Dallas, Texas.