The previous chapter introduced the general reservoir modeling workflow. One topic was left aside though: geostatistics. It is the focus of the present chapter.
Geostatistics are a whole set of techniques that allow modeling properties in three dimensions (3D) by taking into account the spatial variations of these properties. The topic is too large to be covered in this introduction book. We narrowed down to kriging and simulation techniques, which are the more popular techniques by far. We also narrowed down to the modeling of rock types – and by generalization of discrete properties. Similar techniques exist for continuous properties like porosity. Once the concepts presented hereafter are assimilated, the reader will have no problem transferring them to the equivalent techniques for continuous properties.