Full Waveform Inversion - A Case Study Over the Valemon & Kvitebjørn Fields, Norwegian North Sea

Abstract

A case study was carried out over the Valemon and Kvitebjørn Fields, where a high fidelity velocity model was built to solve the complex velocity variations in the overburden. A shallow channel system, several gas pockets and a glacial wedge causes distortions in imaging unless they are incorporated to the velocity model. Through full waveform inversion (FWI) we solve the strong lateral velocity variations in the near surface. Dual sensor streamer broadband acquisition, processing and Q-Kirchhoff pre stack depth migration (PSDM) has resulted in a significantly improved structural imaging.