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

摘要

The report presents a comprehensive analysis of the testing and ensign of thecompletion and hydraulic fracturing treatment on the Lower Canyon Sands in the Enron Oil & Gas Company Sawyer 144A Well No. 5. Presented are a reservoir description; the completion philosophy; the results of the pre-frac pressure flow/buildup test; in-situ stress measurements and stress profiling; the results of specially designed tests to evaluate rate distribution and crossflow in a multi-layered reservoir; the design, execution, and modeling of the fracture treatment; and a summary of the post-frac performance. As part of the West Texas Canyon Sands GRI cooperative well program, some of the data and results obtained on another Canyon co-op well are included with the results from the Sawyer well in the analysis. In-site stress measurements are coupled with the results from the LSDS log stresses to derive a 'calibrated' stress profile to characterize hydraulic fracture propagation. A minifrac calibration treatment was performed and these results are discussed, as well as the pressure history match. The fracture treatment design, using two 3-D fracture models, is presented along with a history match of the main treatment pressures to estimate fracture dimensions.