Rock Physics Modeling - Integrated Services

Description: rp_xplot.gifRock Physics Modeling is the process of finding a rock physics model that is consistent with the well and core data available, and can help us understand the behavior of the reservoir and non-reservoir zones. The process can also correct for some of the problems encountered in well log data. For example, we may find that some zones in the well are closely fitted with an unconsolidated sand model while other zones follow critical porosity or elliptical crack models. These models may have adjustable parameters such as pore aspect ratio or critical porosity that can be determined empirically from the local data. Similarly, some Vs prediction methods are best calibrated to local conditions if core Vp & Vs data or dipole shear wave logs are available. Rock physics calibrations can also aid in selecting a fluid mixture model. Well log data can also be compared to available lab data and to theoretical limits.

The purpose of Rock Physics Modeling is to allow reliable modeling and perturbation of seismic properties with changes in reservoir properties. For example, the data above shows P-wave impedance plotted versus total porosity. Superimposed on the data is a set of rock physics models with different clay fractions. For the data in question, there is a definite link between clay content and porosity. Therefore, if we wish to change porosity, then clay content must also be changed. The rock physics model derived allows prediction of seismic properties away from the wellbore, informing the seismic inversion.

Our iMOSS® modeling technology, which incorporates both isotropic and anisotropic modeling, links elastic measurements directly to rock and fluid properties via the world's most comprehensive database of rock physics relationships.

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Rock Physics Modeling in iMOSS

 

Seismic Services