In the decade since the first Yates field model was built, 3-D modeling has evolved in many important ways. Positive changes have occurred in the tools available to distribute data into the stratigraphic model. Elegant deterministic and stochastic algorithms provide the interpreter with tools to fill the earth volume, given a certain understanding of the geology and petrophysics. Improvements are being made in the application of variogram statistics to improve data distribution at the bedform scale and to use detailed outcrop measurements to build statistical databases of sediment-body geometries that are used, ultimately, to build more realistic sedimentologic and stratigraphic models. Fence diagram of permeability from 3-D model of Yates field.
Black rectangles indicate core-data locations on fences.
Our understanding of sequence stratigraphic concepts has advanced tremendously over the past decade. Unfortunately, understanding does not always beget accurate or even consistent interpretation. In fact, given the same datasets, experienced sequence stratigraphers will often arrive at dramatically different interpretations or opinions. Major fault planes shown by the vertical breaks in structural surface, and several well bores are posted in green. Methods for forward-modeling sedimentary processes tied directly to subsurface data interpretation are being developed that will improve the physical process reality of stratigraphic interpretation.