Field Applications of Constrained Multiwell Deconvolution
- V. Jaffrezic (Total SA) | K. Razminia (Imperial College) | J. Cumming (Durham University) | A. C. Gringarten (Imperial College)
- Document ID
- Society of Petroleum Engineers
- SPE Europec featured at 81st EAGE Conference and Exhibition, 3-6 June, London, England, UK
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- 7 Management and Information, 7.1.6 Field Development Optimization and Planning, 5 Reservoir Desciption & Dynamics, 5.6.11 Reservoir monitoring with permanent sensors, 5.6 Formation Evaluation & Management, 7.1 Asset and Portfolio Management, 5.6.4 Drillstem/Well Testing, 5.5.8 History Matching, 5.5 Reservoir Simulation, 5.6.3 Pressure Transient Analysis
- Constraints, Multiwell, Deconvolution
- 2 in the last 30 days
- 164 since 2007
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This paper applies a new constrained multiwell deconvolution algorithm to two field cases: a gas reservoir with two producers, and an oil reservoir with three producers and one injector. Responses given by the constrained multiwell deconvolution are compared with simulations from history-matched reservoir models.
Permanent downhole pressure gauges are routinely installed in most new wells. The resulting large datasets are usually underexploited, however, because it is near impossible to extract information with conventional techniques in the case of well interferences. Multiwell deconvolution (Levitan, 2006; Cumming et al., 2013) solves this problem by providing constant-rate derivative responses of individual wells as if they were producing alone, and interference effects from any one well to any other. The deconvolved responses have the same durations as the corresponding pressure histories, and show features not visible in any of the test build up or drawdown periods.
The published multiwell deconvolution algorithms are extensions of the single-well deconvolution algorithm from von Schroeter et al. (2001, 2004), which has become an essential component of the well test analysis toolbox. The Cumming et al. (2013) multiwell deconvolution algorithm has been successfully applied to a North Sea reservoir by Thornton et al. (2015). Multiwell deconvolution, however, is strongly overdetermined and the algorithm may not converge to the true solutions. It may also yield solutions that can reproduce pressure histories equally well while being non-physical. This is especially true when dealing with real field data that may be affected by noise on pressure and rate data. In order to reduce non-uniqueness and ensure physically feasible results, Cumming et al. (2019) incorporated additional constraints on the shapes of the deconvolved derivatives to discourage non-physical solutions. They also introduced additional knowledge on the reservoir, for instance, if it is a closed system, all deconvolved derivatives should tend towards a common unit slope at some future time. They illustrated the application of their enhanced algorithm with synthetic examples with known solutions involving up to nine wells. In this paper, the constrained multiwell algorithm is successfully applied to both a gas and an oil reservoir.
By extracting well and interwell reservoir signatures, multiwell deconvolution allow identification of compartmentalization or unanticipated heterogeneities very early in field life, making it possible to adjust the field development plan and the locations of future wells. In addition, it can accelerate the history-matching process by doing it on constant rate pressure responses rather than on complex production histories. An added advantage is that the comparison between the model derivatives and the actual deconvolved derivatives enables identification of mismatch causes.
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Al-Hussainy, R., Ramey, H. J. and Crawford, P.B., 1966:"The Flow of Real Gases Through Porous Media", Journal of Petroleum Technology Volume 18 Issue 05, May. Trans., AIME 237: 624-636. Society of Petroleum Engineers DOI https://doi.org/10.2118/1243-A-PA.
Cumming, J., Wooff, D., Whittle, T. and Gringarten, A. C., 2013:"Multiwell Deconvolution", paper SPE-166458-MS presented at the SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, USA, 30 September-2 October 2013. SPE Reservoir Evaluation & Engineering Volume17 Issue 04 November 2014. Society of Petroleum Engineers doi:10.2118/166458-PA
Cumming, J., Jaffrezic, V., Whittle T. and Gringarten, A.C., 2019:"Constrained least-squares multiwell deconvolution", paper SPE-123456-MS to be presented at the SPE Western Regional Meeting April 22-25, San Jose, CA. Society of Petroleum Engineers doi:10.2118/195271-MS
Gringarten, A. C., 2010:"Practical use of well test deconvolution," paper SPE-134534-MS presented at the 2010 SPE Annual Technical Conference and Exhibition held in Florence, Italy, 19-22 September. Society of Petroleum Engineers doi:10.2118/134534-MS
Houze, O. P., Tauzin, E., and Allain, O. F., 2010:"New Methods to Deconvolve Well-Test Data Under Changing Well Conditions", paper SPE-132478-MS presented at the SPE Annual Technical Conference and Exhibition, 19-22 September, Florence, Italy. Society of Petroleum Engineers doi:10.2118/132478-MS
Levitan, M. M., 2003:"Practical Application of Pressure-Rate Deconvolution to Analysis of Real Well Tests," paper SPE-84290-MS presented at the SPE Annual Technical Conference and Exhibition, 5-8 October, Denver, Colorado. SPE Reservoir Evaluation & Engineering Volume 8 Issue 02 April 2005. Society of Petroleum Engineers doi:10.2118/84290-PA
Levitan, M. M., Crawford, G. E. and Hardwick, A., 2004:"Practical Considerations for Pressure-Rate Deconvolution of Well Test Data", paper SPE-90680-MS presented at the SPE Annual Technical Conference and Exhibition, 26-29 September, Houston, Texas. SPE Journal Volume 11 Issue 01 March 2006. Society of Petroleum Engineers doi:10.2118/90680-PA
Levitan, M. M., 2006:"Deconvolution of Multiwell Test Data," paper SPE-102484-M presented at the SPE Annual Technical Conference and Exhibition, 24-27 September, San Antonio, Texas, USA. SPE Journal Volume12 Issue 04 December 2007. Society of Petroleum Engineers doi:10.2118/102484-PA
Levitan, M. M. and Wilson, M. R., 2010:"Deconvolution of Pressure and Rate Data From Gas Reservoirs With Significant Pressure Depletion" paper SPE-134261-MS presented at the SPE Annual Technical Conference and Exhibition,19-22 September, Florence, Italy. SPE Journal, Volume17, Issue 03 September 2012. Society of Petroleum Engineers doi:10.2118/134261-PA
Ogunrewo, O. and Gringarten, A. C, 2013.:" Deconvolution of Lean and Rich Gas Condensate, and Volatile Oil Wells," paper SPE-166340-MS presented at the SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, USA, 30 September-2 October. Society of Petroleum Engineers doi:10.2118/166340-MS
Thornton, E. J., Mazloom, J., CNOOC, N., Gringarten, A. C., and Cumming, J. A. (2015):"Application of Multiple Well Deconvolution Method in a North Sea Field", paper SPE-174353-MS presented at the SPE Europec/EAGE Annual Conference, Madrid, Spain, 1-4 June. Society of Petroleum Engineers doi:10.2118/174353-MS
Von Schroeter, T., Hollaender, F. and Gringarten, A.C, 2001:"Deconvolution of Well Test Data as a Nonlinear Total Least Squares Problem", paper SPE-71574-MS presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 30 September-3 October. Society of Petroleum Engineers doi : 10.2118/71574-MS.
Von Schroeter, T., Hollaender, F., & Gringarten, A. C., 2004:"Deconvolution of Well-Test Data as a Nonlinear Total Least-Squares Problem" SPE Journal Volume 9 Issue 04, December. Society of Petroleum Engineers doi:10.2118/77688-PA
Von Schroeter, T., and Gringarten, A. C., 2007:"Superposition Principle and Reciprocity for Pressure-Rate Deconvolution of Data From Interfering Wells" paper SPE-110465-MS presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, U.S.A., 11-14 November. SPE Journal Volume 14 Issue 03, September 2009 Society of Petroleum Engineers doi: 10.2118/110465-PA
Whittle, T. M. and Gringarten, A. C., 2008:"The Determination of Minimum Tested Volume from the Deconvolution of Well Test Pressure Transients", paper SPE-116575-MS presented at the SPE Annual Technical Conference and Exhibition, 21-24 September, Denver, Colorado, USA. Society of Petroleum Engineers doi:10.2118/116575-MS