Steven Metcalf, Wayne Davis, Daniel H. gray, Jr., & Brian Ward, BJ Services Company USA & Joe Miller & Jeff Brienen, Conoco, Inc.
The Warren Unit, located in Southeastern New Mexico produces oil and gas from primarily the Blinebry, Drinkard and Tubb formations. Over the last eight years, many of the Drinkard and some of the Tubb wells in this unit have been fracture acidized to improve production. The main fluid pumped has been a crosslinked acid gel system introduced to the unit to facilitate better leakoff control and, therefore, provide better penetration of the stimulation fluid. The results of these treatments are evaluated. Included are comparisons of other viscous acid treating fluids, proppant laden fluids, a fluid properties discussion, treatment procedure description and well locations in the unit. Lithology differences are discussed to show the limitations of the crosslinked acid gel system.