Caprock Integrity Study of the 2nd Wall Creek Reservoir: A case Study from Teapot Dome, Wyoming
Term
4. term
Education
Publication year
2017
Submitted on
2017-06-08
Pages
149
Abstract
Over the last few years, the study of caprocks for geologic CO2 storage has been increased due to the significant risk regarding safety and environment if the containment is not ensured. In this work, a multi-disciplinary approach that integrates geology, petrophysics, rockphyics, and geomechanics concepts are used to characterize the caprock of the 2nd Creek Wall reservoir, Teapot Dome, Wyoming regarding its tensile strength. This field was chosen due to the information availability and the numerous sequestration pilot projects carried out in the site. The first part of this study was done in Techlog©, wellbore platform from Schlumberger and comprises the computation of the petrophysical and mechanical characteristics of the caprock based on the available wireline logging data for 18 wells. The integration of that information is then used to calculate the brittleness index which is related to the tensile strength of the caprock. A neuronal analysis in IPSOM was considered to classify the caprock regarding its ductility and brittleness. The final results of this study show that 2nd Wall Creek reservoir can be seen as a good candidate for a CO2 sequestration project. Finally, those properties are loaded in Petrel, integrated subsurface platform, to create a 3-D grid map the brittleness and ductility of the caprock. The map indicates the possible drilling locations for CO2 storage.
Keywords
Caprock ; CO2 storage ; Petrophysics ; geology ; rock physics ; geomechanics ; Teapot Dome ; 2nd Wall Creek Reservoir ; ductility ; brittleness ; brittleness index ; rock strength ; IPSOM ; Techlog ; Petrel
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