Having pinned down what the wells are telling us and understanding what might be happening spatially we then need to fill in the gaps between the wells using seismic data.

Porosity has the greatest effect on seismic data then lithology and fluids followed by saturation and pressure effects. Based on inversion techniques the lithology and fluid secrets hidden in your seismic are released and in an exploration environment used to reduce risk. In an appraisal or development situation reservoir models are built to reflect all the geological, geophysical and rock physics inputs. Ikon uses another proprietary application called 3D/4D to do this.

It is a very powerful, fast and flexible modelling tool that combines different techniques from inversion to neural networks to help populate models with the requisite rock and fluid properties.

If you want to test whether changes in reservoir conditions (e.g. saturation, pressure) would be detectable by acquiring time lapse seismic (4D) data 3D/4D is the ideal tool.

A geological model is built which defines structure, stratigraphy and reservoir properties with a time varying fluid model. The understanding we have developed in modelling is used to invert the seismic data to reservoir properties used in building the above geological model.

RokDoc-ChronoSeis has a versatile multi-attribute inference tools to calculate these reservoir properties from combinations of existing properties including AI, EI etc. One of the inference tools is an artificial neural network, which has proven to be a very powerful tool.

Other modules within RokDoc-ChronoSeis include Connelly's 'Net Pay' computation and interactive Stochastic Inversion.

RokDoc-ChronoSeis 3D/4D modelling