| dc.description.abstract | A challenge for the geostatistical simulation of subsurface properties in mining, petroleum and groundwater applications
is the integration ofwell logs and seismic measurements,which can provide information on geological
heterogeneities at a wide range of scales. This paper presents a case study conducted at the PortMayaca aquifer,
located inwesternMartin County, Florida, inwhich it is of interest to simulate porosity, based on porosity logs at
two wells and high-resolution crosswell seismic measurements of P-wave impedance. To this end, porosity and
impedance are transformed into cross-correlated Gaussian randomfields, using local transformations. The model
parameters (transformation functions, mean values and correlation structure of the transformed fields) are inferred
and checked against the data. Multiple realizations of porosity can then be constructed conditionally to
the impedance information in the interwell region, which allow identifying one low-porosity structure and
two to three flow units that connect the two wells, mapping heterogeneities within these units and visually
assessing fluid paths in the aquifer. In particular, the results suggest that the paths in the lower flowunits, formed
by a network of heterogeneous conduits, are not as smooth as in the upper flow unit. | |
