Abstract: A method for generating synthetic seismic traces. The method includes receiving a hybrid model that includes geological and seismic data, where the geological data corresponds to a zone of interest and the seismic data corresponds to the zone of interest and adjacent areas of the zone of interest. The method may determine a plurality of reflection properties along a path for a trace location using data from the hybrid model. The method may then generate a synthetic seismic trace for the trace location using the plurality of reflection properties.

Abstract: A discretized lithologic model of the subsurface is defined by a regular array of pixels. Each pixel corresponds to one of a finite number of possible lithoclasses such as sand, shale or dolomite. The lithoclasses are unknown except at a small number of sparsely distributed control pixels associated with borehole locations. Associated with each pixel there is a multivariate record of seismic attributes that may be statistically correlatable with the local lithology. A Monte Carlo method is used to simulate the lithoclass spatial distribution by combining the lithologic data at control pixels with the seismic-attribute data records. Using Indicator Kriging, a prior probability distribution of the lithoclasses is calculated for each pixel from the lithology values at neighboring pixels. The likelihood of each lithoclass is also calculated in each pixel from the corresponding conditional probability distribution of seismic attributes.