Injection Influence on Production Wells in the Unit 13, Unit 16, Smudgeo 1, and Bear Canyon Areas of the Southeast Geysers

Abstract

Steam production data from wells surrounding injection well CA in Unit 13, Barrows-1 in Unit 16, CA 1862-6 in, and Davies in Bear Canyon were analyzed to estimate steam decline rates with and without water injection. The information was utilized to estimate annual and cumulative injectate recovery factors in these wellfields. Annual recovery factors, summarized in Table 1, range from less than 1% in to 73% in Unit 13. Injection benefits were observed in wellfields with low reservoir pressure (low boiling temperature), high steam enthalpy (dry reservoir with large heat contents), and high fracture density (large surface area for heat transfer). The methodology and results of this study can be helpful designing future injection projects in vapor-dominated systems.