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At South Ellwood field in the Santa Barbara Channel, offshore Southern California, Venoco Inc. employed advanced reservoir characterization technologies to identify redevelopment options. The firm’s characterization efforts included reprocessing of first generation, 3D seismic data; integration of dipmeter, BHTV, FMI and oriented-core data; fracture modeling, using a new Pipeline Network model; and production logging to define OWCs and identify plugback/ recompletion opportunities.
The first of three planned development wells, 3242-7-2, accessed a previously undrained fault block, producing more than 800 bopd and 2 MMcfgd upon initial completion. A five-well, through-tubing plugback program, based on data from new-generation production logs, and considering the new geological understanding, has increased production by 600 bopd and reserves by 6 million bbls. Two newly defined, fault block structures, primarily identified by seismic reprocessing, should be drilled during 2004. Reserve potential there could exceed 60 million bbls.
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