--> Gas Field Production Data Analysis, The Truth, the Whole Truth and Nothing But the Whole Truth

AAPG Asia Pacific Technical Symposium

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Gas Field Production Data Analysis, The Truth, the Whole Truth and Nothing But the Whole Truth

Abstract

Gas Field Production Data Analysis has advanced significantly in recent years with advanced techniques such as Flowing Material Balance and Rate Transient Analysis etc. providing additional tools to characterize gas reservoirs and estimate their ultimate recovery. These advanced techniques would not have been possible without the advent of permanent downhole gauges and automated flowing tubing head pressure measurements. As a result, today’s reservoir engineers have a veritable plethora of production data on which to characterize gas reservoirs and estimate their ultimate recovery. However, data sets are not always examined to their fullest potential, and more often than not, this is occurs due to a singular approach to analysis, rather than application of multiple mutually exclusive analysis. This paper discusses how to combine traditional and more advanced production data analysis techniques to gain insight into gas fields, ranging from tight gas reservoir to conventional reservoirs under active water drive. Such insight is not obtained from brute force application of one size fit all techniques, but understanding the appropriate combination of techniques is likely to characterize gas reservoirs in place volumes and estimate their ultimate recovery. This integration is essential in narrowing uncertainties in the reserves and resources estimation process of fields, in particular the SEC reliable technology criteria, helping operators and investors to make decisions with confidence.