Well Completion and Hydraulic Fracture Treatment Design and Analysis of the Canyon Sands (Upper Interval). Enron Oil and Gas Company Sawyer 144A Well No. 5 Sawyer (Canyon Sands) Field, Sutton County, Texas. Topical Report, October 1991

摘要

The report presents a comprehensive analysis of the testing and design of the completion and hydraulic fracturing treatment on the Upper Canyon Sands in the Enron Oil and Gas Co. Sawyer 144A Well No. 5. Presented are a reservoir description; the completion philosophy; the results of the pre-frac flow and pressure buildup test; in-situ stress measurements and profiling; the design, execution, and modeling of the minifrac and main fracture treatment; and the post-frac results. As part of the West Texas Canyon Sands GRI cooperative well program, some of the data and results obtained on a second Canyon co-op well are included with the results from the Sawyer well in the analysis. In-situ stress measurements are coupled with LSDS log stresses to derive a 'calibrated' stress profile to characterize hydraulic fracture propagation. The fracture treatment design, using two 3-D models, is presented. Using the calibrated stresses, modulus values from triaxial tests, and the results from the minifrac calibration treatment, the pressures from the fracture treatment are history matched to estimate fracture dimensions. These are compared to the results of the post-frac pressure buildup test. Recommendations are provided for future treatments in this interval.