This paper presents results from an evaluation of water-frac stimulation treatments in the Bossier tight gas sand play in the East Texas Basin. The primary objective of our study was to compare the stimulation effectiveness of conventional water-fracs with a hybrid water-frac technology. The hybrid water-fracs combine the advantages and benefits of both conventional gel and water-frac treatments. Stimulation effectiveness, measured in terms of fracture half-length and conductivity, was evaluated using short-term pressure buildup testing integrated with decline type curve analysis of long-term gas production data. The results of our study indicate that we can achieve longer effective fracture half-lengths and higher effective fracture conductivities more consistently using the hybrid water-frac technique.

Keywords:
pressure buildup test, flow in porous media, two-week pressure buildup test, drillstem testing, spe annual technical conference, production data, effective fracture half-length, drillstem/well testing, fracture conductivity, fluid dynamics
Subjects:
Hydraulic Fracturing, Reservoir Fluid Dynamics, Formation Evaluation & Management, Fracturing materials (fluids, proppant), Flow in porous media, Pressure transient analysis, Drillstem/well testing
Copyright 2003, Society of Petroleum Engineers
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