Reserve estimates in western basins. Quarterly report, January--March 1994

Abstract

During the first quarter of 1994, work continued in assembling of data on the Uinta Basin. This included integration of the PI, NPS and WHCS data bases, assembly of critical well lists, construction of base maps, acquisition of log and core data, digitizing and commencement of log interpretation. During this period the authors anticipated the USGS Resource Assessment being completed for the Uinta Basin. Concern was expressed that delays in completion of this work would jeopardize the Uinta Basin schedule for report completion and also that methodology differences between that used for the Uinta Basin versus the Greater Green River Basin would cause problems in using common methodology from basin to basin. It was agreed that the Uinta Basin work would be wound down and work on the Piceance Basin commenced to allow the USGS time to complete their work and also to create sufficient time to review methodology differences and to derive a solution for commonalizing the methodology. Base maps for the Piceance Basin are under construction and the process of constructing key well lists is underway. The Uinta Basin work is being wound down with the completion of digitizing and log interpretation on the first set of Uinta Basin wells. The first draft of the USGS Uinta Basin work has been received and is in the process of review. As previously communicated, the Uinta Basin methodology does not involve a volumetric in-place estimate which is the required starting point for the methodology. As a result, a proposal has been forwarded to fund the generation of an in-place estimate by play for the Uinta Basin to allow the common approach to be utilized between all three tight gas basins.