Tight Gas Production Performance Using Decline Curves
- 16 June 2008
- conference paper
- conference paper
- Published by Society of Petroleum Engineers (SPE) in All Days
Abstract
Traditional ("Arps") decline analysis is the most common reservoir engineering tool used for production performance forecasting. It has several advantages over other techniques in that it is simple to use, requires minimal data and is well understood by the industry. Currently, however, these methods are being misused in unconventional applications, such as tight gas. Production perfomance from tight gas reservoirs is characterized by steep initial decline rates and long periods of transient flow. If decline analysis is performed using this transient production data, the main assumption of boundary dominated flow (BDF) is violated and inaccurate forecasts may result. The goal of this work is to understand the behaviour of tight gas reservoirs during transient flow so that the familiar Arps method may be applied. The effects of different tight gas production responses (bilinear, linear, pseudo-radial, boundary dominated) are investigated. Finally, a methodology for applying traditional decline curve analysis to tight gas, with reference to long term transient flow, is presented.Keywords
This publication has 13 references indexed in Scilit:
- Estimating Reserves in Tight Gas Sands at HP/HT Reservoir Conditions: Use and Misuse of an Arps Decline Curve MethodologyPublished by Society of Petroleum Engineers (SPE) ,2007
- Evaluating and Developing Tight Gas Reserves- Best PracticesPublished by Society of Petroleum Engineers (SPE) ,2007
- Production Decline Performance of CBM WellsPublished by Society of Petroleum Engineers (SPE) ,2007
- Dynamic Material Balance(Oil or Gas-In-Place Without Shut-Ins)Published by Society of Petroleum Engineers (SPE) ,2005
- Reserve Analysis for Multilayered Tight Gas ReservoirsPublished by Society of Petroleum Engineers (SPE) ,2003
- Reserve Analysis for Tight GasPublished by Society of Petroleum Engineers (SPE) ,2002
- Applications of the Transient Hyperbolic ExponentPublished by Society of Petroleum Engineers (SPE) ,2001
- Analyzing Well Production Data Using Combined Type Curve and Decline Curve Analysis ConceptsPublished by Society of Petroleum Engineers (SPE) ,1998
- Useful Concepts for Decline-Curve Forecasting, Reserve Estimation, and AnalysisSPE Reservoir Engineering, 1996
- The Use of Conventional Decline Curve Analysis in Tight Gas Well ApplicationsPublished by Society of Petroleum Engineers (SPE) ,1985