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An ever-expanding range of reservoir scenarios continues to challenge oilfield operators and service companies to provide completions that will not only produce at optimum levels but will also accelerate return on investment (ROI). Unfortunately, in attempting to satisfy these needs, developers often overlook a very important component of the completion scenario — the perforation process. This paper will demonstrate that focusing perforator system performance on reservoir productivity rather than on the shaped charge, performance optimized for concrete testing (which is the case with API Section I) can ultimately lead to significant improvement in well inflow performance. The discussion will demonstrate that: The actual performance of given shaped charges at in-situ conditions for both penetration and effective flow should be evaluated to make perforating decisions for the completion process. Applying the perforating concepts discussed in this paper significantly optimized well productivity for a major West Africa project in which wells with 1000 feet of perforations were to be completed. Economic penetration studies, perforation performance evaluation, optimization using a Perforation Flow Laboratory, and tests on the Alba-Field core samples were conducted using unique strategies. An innovative live-well modular gun system was utilized on this project to maximize well inflow performance. The system will provide significant cost savings to the operator and will generate much improved well productivity over that which had been attained in the exploration well program. |
