Project: 611 – 3D Model Bouguer Correction – Onshore

In this project, you will use 3D gravity modeling software in an onshore setting to calculate the 3D gravity effect of the topography.
This effect, the 3D Bouguer correction, will then be applied using grid processing software to the Free-Air gravity thus producing Bouguer gravity.
Most of the signal in onshore Free-Air gravity is from the large density contrast at the air-topography interface.
This same type of large density contrast but at the water-sediment interface is what necessitates the Bouguer correction for offshore gravity data.
Without the correction, mapped gravity data is largely a reflection of the topography.
You will also come to understand why a 3D or side-looking calculation is better than a simple vertical offset Bouguer correction.
This project will also allow you to experiment with various control parameters within the modeling software to understand their effect on the computation.
Prerequisite Project: 600