Tight Gas Sands Research Program: Field Operations and Analysis. Cooperative WellReport. Enron Oil and Gas Company, South Hogsback Well No. 13-8A, Lincoln County, Wyoming. Topical Report, November 1989-December 1990

摘要

Enron Oil and Gas Company drilled the South Hogsback Well No. 13-8A in LincolnCounty, Wyoming in November 1989. The GRI cooperative program on the well included coring, logging, stress testing, well testing, a mini-frac treatment, and a fracture treatment. GRI contractors used the results of the first four parts of the coop program to arrive at a pre-fracture formation analysis and to design the mini-frac and main fracture treatment. Wellbore seismic monitoring was used to help determine the results of the mini-frac. Based on the pre-fracture formation analysis, the fracture treatment was designed and pumped successfully. A total of 120,000 gallons of 70-quality foam and 265,400 pounds of 20/40 sand was pumped. Post-fracture analysis using FRACPRO (fracture model) and reservoir simulation agreed very well and indicated that propped fracture length was 320 feet.