Advanced Reservoir Characterization and Evaluation of CO{sub 2} Gravity Drainage in the Naturally Fractured Spraberry Trend Area

Abstract

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Preferred Waterflood Management Practices for the Spraberry Trend Area

“…Additional information of this project can be found in our annual reports. 6 The water injection started in October 1999. We have divided oil production into 23 off-trend and 7 on-trend wells and the results are shown in Fig.…”

Advanced Reservoir Characterization and Evaluation of CO2 Gravity Drainage in the Naturally Fractured Spraberry Trend Area

“…Three gravity drainage experiments were completed in the first year of the project, two the second year, and one the third (see Schechter, 1996 and. The details of these experiments have been discussed in previous publications.…”

“…The details of these experiments have been discussed in previous publications. Irnbibition experiments and modeling on core plugs have also been conducted (Schechter, June 10, 1998).…”

Advanced Reservoir Characterization and Evaluation of C02 Gravity Drainage in the Naturally Fractured Sprayberry Trend Area

“…As discussed in our Second Annual Report, 8 the average fracture aperture in the Spraberry Trend Area may be taken as 0.0025 inch. Based on recent fracture characterization, 8 three distinct fracture sets, trending NNE, NE, and ENE, are present in cores from the 1U and 5U units in the Upper Spraberry zone. The average fracture spacing of the three fracture sets are 1.62, 3.17, and 3.79 feet, respectively.…”

“…The permeability anisotropy may be estimated based on well testing data as shown in our Second Annual Report. 8 Here we present two approaches for estimating the on-trend secondary permeability. This first one is called parallel flow model, and the second one is referred to as the scaling model.…”