A Novel Flow Profiling Approach Using Permanent Downhole Pressure Gauges

Abstract

Flow profiling through permanent downhole pressure gauge, a novel and unique application, is proposed in the present paper. Theoretical development of the new technique is first provided. Example studies are then given to illustrate the application of the technique. Application scenarios, practical issues, as well as key impacting parameters are also addressed. Finally, a field case study implementing the new technique for a long horizontal well is performed to demonstrate how the production profiles calculated from permanent downhole gauge (PDG) data compare closely to the results from a recent production logging (PLT) survey which was expensive and mechanically risky yet turned out to be unsatisfactory.

The technique could be applied to real-time production and injection profiling for different well configurations (vertical, horizontal, deviated, and multilateral) and bring tremendous financial benefits through replacing conventional production logging surveys that could be cost-extensive for horizontal or multilateral wells offshore.

Keywords:

• flow profiling
• frictional pressure drop
• permanent downhole gauge
• production logging
• sensitivity study
• coiled tubing

ACKNOWLEDGMENT

We would like to express our sincere thanks to the managements of ChevronTexaco Exploration & Production Technology Co. and ChevronTexaco Overseas Petroleum Co. for their permission to publish this paper. Thanks are also due to Mr. Dave Belanger, Mr. Michael Mclerie, and others for their insightful discussions and suggestions.