Meeting the Challenge with Airborne Full Tensor Gradiometry: A Technology for Our Times

Airborne Full Tensor Gradiometry (FTG) is a high-precision, high-resolution technology that directly measures changes in the Earth’s gravity field caused by subsurface geology.

FTG maps contact information generated by density contrasts resulting from stratigraphic and structural changes. The technology has enjoyed immense success on many projects worldwide and recently been deployed both onshore and offshore Malaysia and the Philippines for both regional and prospect scaled projects. FTG data are used to map both deep basement architecture and delineate complex fault patterns within sedimentary basins. Such examples include rift basin and tilted fault blocks to strike slip faults and inversion structures such as thrust related anticlines. FTG technology is used to identify and delineate potential structural closures suited for reservoir entrapment.

This presentation describes how FTG has been used successfully in different basin settings from identification of deep rooted sedimentary zones to mapping of complicated fault patterns as they impact on the distribution of target geology; and in particular will show examples from both foreland and fore arc basin settings. The impact for exploration is immense. Air-FTG® optimises exploration budgets by quickly identifying prospectivity and facilitating a clear and cost effective focus for detailed exploration of established leads.

Presented by: Colm Murphy, Chief Geoscientist with Bell Geospace. This topic was first presented at the EAGE non seismic workshop held as part of SEAPEX 2015 in Singapore.

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