TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractOne of the major producing zones in the Texas panhandle is the Granite Wash. The Granite Wash play is currently focused on Wheeler and Hemphill counties on the Oklahoma border and covers more than 1,000 sq mi of tight-sand formations.

fax 01-972-952-9435. AbstractThis paper will describe the ongoing Granite Wash completion project in the Buffalo Wallow field in Hemphill and Wheeler Counties, Texas. This study will discuss the reservoir development and characteristics, current and former completion techniques, and production comparisons. The goal for this study is to use best practices gained from a statistical analysis and new chemical technologies for completion procedures in the Granite Wash project utilizing a permeability core testing apparatus for optimized regained permeability in fracturing fluids.Surface modification agents (SMAs) and their coating onto proppant have been applied in treatments of thousands of wells in the last 10 years and have undeniably improved their productivity in terms of production rates and duration. The coating of these SMA materials has been found to dramatically enhance the recovery of aqueous-based fracturing fluids during well cleanup after fracturing treatments. As a result, a significant improvement in gas production has been observed in treated wells. Friction-reduction polymer antiflocculants have been developed to reduce the tendency of these polymers to damage the proppant pack/reservoir interface, resulting in a decreased effective fracture length. A nonionic, micro-emulsion surfactant has been developed to reduce capillary pressure in producing hydraulic fractures via surface tension reduction and contact angle modification. These chemicals have been used in various combinations; the field results as well as testing results will be presented.A patented low-permeability core testing apparatus has tested two granite wash core samples from the Buffalo Wallow field for regained permeability using frictionreduction polymer anti-flocculants, SMAs (specifically diagenesis protective agents), and micro-emulsion surfactants. In addition, basic water-frac additive packages have been applied to continue the optimization of water fracs in the Texas Panhandle to increase long-term natural gas production.The data from those tests and field case histories will be discussed.

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractModern reservoir characterization-simulation studies integrate geology, seismic, petrophysics and engineering to build threedimensional (3D) static geologic and dynamic fluid flow models. These models have repeatedly proven their worth through reduced risk and improved reservoir management decisions. Prior to the advent of modern computers and software, traditional reservoir engineering techniques served the industry well through analytic and graphical analysis techniques. It would seem that the modern characterization tools would make these traditional reservoir engineering techniques obsolete; however, this paper shows that integrating these traditional techniques can improve the quality of modern 3D models. This paper describes a field example where traditional reservoir engineering techniques from 40 years of waterflooding history were integrated into the modern reservoir characterization-simulation workflow.