Using SBED to investigate Permeability Modeling of Heterogeneous Reservoirs Geomodeling actively supports Universities and Consortia that have applications for our software. Three very interesting graduate student thesis projects have been completed over the past two years involving use of SBED to investigate problems in permeability modeling of heterogeneous reservoirs. "Estimation...
Improving Reservoir Characterization and Simulation With Near-Wellbore Modeling
New reservoir characterization methods are needed to integrate multiscale exploration and development data, particularly at the interface between well and field models. In this paper, we illustrate a novel workflow involving high-resolution near-wellbore modeling (NWM), which allows us to accurately include seismic, wireline data, image logs, and well core logs...
Estimation of Reservoir Heterogeneity from the Depositional Environment in Reservoir Characterization of a CHOPS Field
The major challenge in reservoir characterization is to estimate the effective porosity and the permeability of the reservoir due to reservoir heterogeneity. Often the vertical and the horizontal permeability are not considered separately in 3D geo-cellular models and in the reservoir simulations. Conventional reservoir modeling extrapolates all of the small-scale data to full-field scale...
Estimation of geocell permeability based on small-scale sedimentary structures in the Brent Group on the Gullfaks and Oseberg fields
Permeability is very difficult to estimate, mainly because it is very scale- and direction dependent. For instance, from permeability measured in core plugs to permeability estimated from well tests, there is a big difference in scale. How to compare these correct and apply further in reservoir computer models, is a...
Estimation of geocell water saturation based on small-scale structures in the Brent Group on the Oseberg and Gullfaks fields
Water saturation in reservoir rocks is highly dependent on petrophysical parameters as permeability, porosity and the amount of clay and shale in the sandstone. Saturations are important for static hydrocarbon volumes and for saturation-dependent flow parameters, such as relative permeabilities. Methods used today to estimate water saturation are usually based...
Core-Data Preprocessing To Improve Permeability-Log Estimation
Two techniques of preprocessing data from core plugs have been investigated to enhance the quality of synthetic permeability estimation from conventional logs by use of artificial neural networks (ANNs). A first technique consists of “cleaning” the core-plug data set by removing the measurements deemed log-incompatible (i.e., those from plugs corresponding...
Petrophysical characterization of a heterolithic tidal reservoir interval using a process-based modelling tool
Heterolithic lithofacies in the Jurassic Tilje Formation, offshore mid-Norway, consist of three components - sand, silt and mud intercalated at the centimetre scale - and are generally difficult to characterize petrophysically with core and wireline data. A near-wellbore model of the lower part of the Tilje Formation in the Heidrun...
Sequential Simulation With Patterns
Flow in a reservoir is mostly controlled by the connectivity of extreme permeabilities (both high and low) which are generally associated with marked, multiple-scale geological patterns such as fluvial channels. Accurate characterization of such patterns requires multiple-point correlations that are much beyond the reach of the two-point correlations provided by...
A petrophysical evaluation of tidal heterolithic deposits: Application of a near wellbore model for reconciliation of scale dependent well data
The main goal of this thesis, A petrophysical evaluation of tidal heterolithic deposits: application of a near wellbore model for reconciliation of scale dependent well data, is to give a better and less uncertain estimate of porosity and permeability in a challenging reservoir type. This is accomplished through an integrated...