A density cube can then be defined using the geometry of the geological layers and the density data from nearby wells. This was followed by calculation of gravity in PetroCaem. Region model created by PetroCaem . Each representative layer was created between successive surfaces of the model. This process includes several steps in which smaller discontinuous regions are included in larger regions.
Figure below shows the comparison between the calculated gravity and the observed gravity.
In reality, the intrusive rocks in this area are highly weathered andesitic rocks, and do not show high densities. In continuing our effort in updating the density model, we have introduced low densities like the surrounding rocks for the intrusives. After a few trials, we were able to obtain a calculated gravity field which resembles the observed gravity. This indicates that by modeling gravity and comparing it with the observed data, we can create a better earth model. Gravity modeling and comparizon to the observed gravity .