The naturally fractured Spraberry Trend Area in West Texas has confounded engineers for decades. Waterflooding in the 50’s and 60’s resulted in operators dismissing this as an economic recovery method. In the early 1990’s, as a result of Department of Energy funded research, an extensive investigation was conducted on characterizing the reservoir as a precursor to a CO₂ pilot. This seminar will discuss all aspects of the research conducted to characterize the reservoir and results of water and CO₂ injection in the pilot area. Field topics include, vertical and horizontal cores, FMI logs, step rate injection tests, pulse and interference testing and tracer tests. Lab topics include investigation of wettability at reservoir conditions, capillary pressure measurements and imbibition/gravity drainage experiments. A summary of a water and CO₂ pilot injection in the E.T. O’Daniel Spraberry Unit will be presented