Recompletion decisions at Stratton field historically have been complicated by the presence of many thin sand lenses of widely varying pay qUality. The advent of a cased-hole formation evaluation tool-the dual detector pulsed neutron log (DDPN)-has simplified matters greatly by revealing current, detailed information about reservoir rock properties and fluid saturations. By using 4 years of recompletion data, DDPN log characteristics and logderived parameters have been identified and used successfully to distinguish between gas-, oil-, and waterbearing zones, to predict when fracture stimulations will be required to produce at commercial gas rates, to identify depleted gas zones, and to rank potential recompletion zones according to their respective absolute open-flow potentials (OFP's). IntroductionStratton-Agua Dulce field, discovered in the late 1930's, is a gulf coast field located about 45 miles [72 km] west of Corpus Christi, TX (see Fig. 1). Production is from the Frio and upper Vicksburg formations (Oligocene shaley sands), with the typical wellbore penetrating more than 25 reservoirs scattered throughout a 3,OOO-ft [914-m] interval (see Fig. 2 for a type log). The reservoirs are relatively thin sand lenses, ranging from 5 to 20 ft [1.5 to 6.1 m] gross interval. The areal extent of these reservoirs is limited by both the many down-to-the-coast faults in the area and reservoir pinchouts attributed to sand depositional environments. Thus recompletion attempts have been complicated not only by the sheer number of reservoirs, but by the complex geology of the area. It is quite common that recompletion attempts reveal a sand that is wet, depleted, or tight but productive in an immediate offset well. Likewise, sands known to be wet or depleted in some wells often are found to be commercial in offset recompletion attempts.With the increase in hydrocarbon value since 1978, recompletion economics have improved vastly and created a need for a tool to help identify the best possible zone remaining in the wellbore. The original suite of openhole