Estimation of Production Rates by Use of Transient Well-Flow Modeling and the Auxiliary Particle Filter: Full-Scale Applications
- Rolf J. Lorentzen (International Research Institute of Stavanger) | Andreas S. Stordal (International Research Institute of Stavanger) | Xiaodong Luo (International Research Institute of Stavanger) | Geir Naevdal (International Research Institute of Stavanger)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- May 2016
- Document Type
- Journal Paper
- 163 - 175
- 2016.Society of Petroleum Engineers
- rate allocation, well flow modeling, estimation
- 1 in the last 30 days
- 293 since 2007
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In the current work, we demonstrate the use of a detailed transient multiphase well-flow model and the auxiliary sequential-importance resampling filter, for better representation of flow rates in petroleum wellbores (influx and/or outflux). The fundamentals of the methodology have been presented by the authors in a previous work, and the purpose of this paper is full-scale case studies. Performance, robustness, and flexibility are demonstrated with data sets from two different wells.
The first case is an application to an inclined gas producer with two inflow reservoir zones. Observations consist of pressure and temperature at two locations in the well. Next, we present an application to an inclined water injector with nine outflow zones. Observations consist of data from a distributed temperature sensor (DTS) and one pressure observation at the end of the DTS rod.
Estimate of zonal flow rates, including error bounds, lead to better well control and reservoir management, which again are important for improved recovery of oil from existing petroleum fields. The results presented in this paper clearly demonstrate the feasibility of automatic identification of reservoir flow-rate distribution from wellbore measurements.
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