The naturally fractured Spraberry Trend Area in west Texas covers approximately 2,500 square miles over a six county area. There are approximately 9,000 wells cuurently producing in the Spraberry Trend. Some 6-10 Bbbls of original oil is contained yet after 50 years of production, only 700 million bbls have been produced. Low recoveries associated with low matrix permeability and stress-sensitive natural fractures have thwarted attempts to improve recovery. This tremendous resource has been difficult to utilize due to the complicated nature of the reservoir.
Many wells are near the economic limit.
The overall goal of this project is to assess the economic feasibility of CO 2 flooding the naturally fractured Spraberry Trend Area in west Texas. Additionally, we are in the process of completing all wells and surface facilities prior to CO 2 injection in an 80 acre field demonstration pilot project in the E.T. O'Daniel Spraberry Unit shown in the map below. Four vertical wells and the horizontal well were cored for identification of net pay, oil and water saturation and core-log integration. 300 feet of horizontal core was acquired to characterize the fracture system. Water injection was initiated after completion of a multi-well interference test.