Alain Gringarten, Ph.D
WEDNESDAY AUGUST 11, 2021 – 12:00 hs (GMT -3)
Abstract of the talk:
Well test analysis is used to assess well condition and obtain reservoir parameters. Major improvements have occurred approximately 13 to 19 years apart, driven by the availability of both new types of data and new mathematical tools. While early interpretation methods (straight lines in the early 1950’s or log-log pressure plots in the late 1960’s) were limited to the estimation of well performance, well test analysis has become a very powerful tool for reservoir characterisation, following the formulation of an integrated methodology in the early 1980s; the introduction of pressure-derivative analysis in 1983; the development of complex interpretation models able to account for detailed geological features; the development of a stable deconvolution algorithm in the early 2000’s; and its successful extension to multiple interfering wells (2008-2018).
Although not strategically driven, progress in well test analysis techniques has essentially resulted in a significant increased capability for (1) identifying an applicable interpretation model and (2) verifying the consistency of that interpretation model. As a result, the amount of information that one can extract from well test data and more importantly, the confidence in that information, has increased significantly.
Any new improvement will have to further enhance the ability to identify and verify the well test interpretation model, and provide additional information. How to achieve this has always been difficult to predict, but, following the development of multiwell deconvolution, using richer signals and mining the huge amount of well data available is a most likely direction.
Professor Alain C. Gringarten is Emeritus professor of petroleum engineering and Senior Research Investigator at Imperial College London. A recognized expert in well test analysis, he has over one hundred publications and received several SPE awards (2009 North Sea Regional Service; 2004 Cedric K. Ferguson certificate; 2003 John Franklin Carll award; and 2001 SPE Formation Evaluation). A SPE member since 1969, he was elected a Distinguished member in 2002, a Honorary member in 2009 and was a 2003-2004 Distinguished Lecturer. He holds petroleum engineering MSc and PhD degrees from Stanford University; and an engineering degree from Ecole Centrale Paris, France.
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