Abstract
Several difficulties are encountered to construct carbonate geological model which maintain their highly heterogeneous reservoir characters. One of the most difficult tasks is to establish both Reservoir Rock Type (RRT) scheme and its lateral distribution properly. In many cases appropriate RRT scheme for dynamic model tend to lose their reliability on 3D lateral continuity, i.e. further detailed subdivision of the RRT meets reservoir engineering requirements but loses inter-well continuity with technical justifications.
This new 3D modeling approach firstly integrates full geological information and findings, and successfully constructed 3D Initial Geological/Lithological Model (IGLM). The IGLM keeps lateral lithofacies distribution with technical and logical justifications. Secondly RRT scheme is constructed purely based on petrophysical data such as MICP, φ-K correlation and Amott wettability. Each RRT contains several lithofacies and doesn't show one to one correlation. Thus in order to construct petrophysical model these RRTs are stochastically plugged in to each lithofacies of IGLM. The benefit of the new 3D modeling approach is to make easy update the model with additional data/information from continuous field development.
