The Inverse Modeling and Geostatistics Project
Exploration for oil, gas and ground water is based on two very
different exploration methods.
[Geostatistics] One method makes use of direct measurements in
the subsurface and an a priori model of the spatial variability to
generate multiple realizations consistent with observations and an a
model [upper left figure]. This method is known as geostatistics.
[Inverse Problem Theory] Another method is based on indirect
physical measurements, typically surface
measurements. By using a physical model that describes the observed
data as a function of an earth model, the aim is to build a model of
the subsurface illustrating geological features [upper
right figure. These methods are known as inverse methods.
[Inverse modeling AND geostatistics]
Quite surprisingly the two methods have until recently been used
independently. This usually led to different and inconsistent models of
the subsurface. It is the aim of the
Inverse Modeling and Geostatistics Project to bring together the two
methods to pursue models with a much better accuracy and consistency
with all observed data. Improved model accuracy will have major
economical and ecological impact as we aim to work on data from both
water models and oil/gas exploration.