It is important to find the quantitative sensitivity between TOC change and seismic and geomechanical properties for shale reservoir characterization. Although it is commonly known that bulk density is the most sensitive rock property for the change in TOC, it has not yet been well interpreted. In this study, we conducted statistical analyses for the effects of three rock properties, such as TOC, porosity and clay volume fraction, to seismic and geomechanical properties. We investigated that the clay volume and porosity have significant effects on most of the seismic and geomechanical parameters except the bulk density. However, TOC is the most influential factor in bulk density, overwhelming the effects of the other two variables. As a result, we can build a robust and reliable parameterization for the shale rock physics model from these statistical analyses. Furthermore, it is obvious that accurate seismic inversion of not only seismic velocities but also bulk density is necessary for better TOC estimation and shale reservoir characterization.
Presentation Date: Wednesday, September 18, 2019
Session Start Time: 8:30 AM
Presentation Start Time: 9:45 AM
Presentation Type: Oral