Full text loading...
-
Numerical Welltest Simulation to Evaluate Compressibility and Geological Models
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
In recent years, numerical welltest simulation has allowed engineers to incorporate even more information from welltests into dynamic simulations. This works quite well on conventional fields for which production data is readily available and uncertainty ranges are relatively small. In the case of undeveloped poorly consolidated shallow sandstone reservoirs however, matters are complicated by the fact that few analogues are available and pore compressibility is highly uncertain. In this abstract it is shown how numerical welltest simulation can be used to provide insight to which sets of chosen static and dynamic inputs yield physically consistent reservoir scenarios to be used for evaluation of such undeveloped fields. This is shown through evaluation of a field case from the North Sea area. Using a workflow adopting numerical welltest simulation and a 3D tartan grid, it is demonstrated how a geological realisation may be disqualified using one endmember of compressibility while it can be considered to be valid using the other extreme. Thereby feedback-loop is effectively provided and evaluation of physical consistency of geological models and dynamic properties enabled.