High-resolution crosswell seismic reflection data were acquired at a Port Mayaca aquifer test site about 30 miles west of the Atlantic Ocean and approximately one mile east of the eastern boundary of Lake Okeechobee in Martin County, Florida (Figure 1). Measurements were taken between monitoring wells MF-37 and EXPM-1 at an interwell separation of 1300 ft using a Z-Seis piezoceramic X series source and a 10-level hydrophone system. Multiple source and detector measurements were taken in the interval from 400 to 1700 ft (Figure 2). The objectives of the survey were to map flow-unit variability in the region between the two wells, to assess whether the high-resolution seismic survey could be resolved, detect zones of high-water production, and to map the matrix porosity/permeability.

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