Gravimetric applications for oil and gas

GReD provides tailored services and solutions in the whole gravimetry product line: from the pre-processing of along track data to the computation of gravity anomaly grids and their inversion.

GReD has developed innovative tools to filter airborne/shipborne gravity data, adjusting the low frequency signal on the basis of the most advanced satellite missions dedicated to the observation of the gravity field.

GReD computes high accuracy gravity anomaly grids (Free air, Bouguer and Isostatic) starting from airborne, shipborne and ground gravity data. Moreover GReD provides “quick look” gravity grids on the basis of the most up-to-data freely available gravity models/grids.

GReD provides local inversion for the determination of density anomalies and main geological units boundary.

 

Gravimetry oil and gas

 

Example application:

Basin-scale/regional inversion

The determination of sediment thickness, depth-to-basement and type of crust are fundamental input information for Oil & Gas exploration. In the last few years several models describing basin architecture appeared on the market. The main problems related to these solutions are the low resolution (100-200 Km) and the unknown reliability (unknown methods and/or level of interpolation with respect to real data).

Through the combination of high resolution gravity field, retrieved by global navigation satellite systems (GNSS) and inertial navigation systems (INS), global gravity field from satellite observations and advanced algorithms to perform inverse modeling, top edge solutions can be developed to reduce cost to oil and time to market.

Numerous geophysical studies have addressed the problem of estimating the depth of the Moho beneath the Tibet plateau and the Himalayan region: the structure of the Earth’s crust has been studied by several seismic exploration campaigns, studies based on gravimetric inversion and flexural models. However, all these models, based on seismic data and ground gravity observations, are limited by by the lack of data due to the extreme topography of the region. The recent availability of observations GOCE one of ESA Earth Explorer missions, allows for the first time directly to reverse a large amount of gravitational observations obtained in a uniform manner and with high precision. In this framework a new 3D model of the Moho beneath the Tibetan plateau and the Himalayan region from a direct inversion of gravimetric observations of the GOCE satellite was produced.

GOCE_Tibet

This work was presented at the IUGG 2011 (Melbourne, Australia);  the presentation can be downloaded from here: The Goce Estimated Moho Beneath the Tibetan Plateau and Himalayas.