A Holistic Approach to Model-Building in and around Injectites: A Case-Study Offshore Norway
V. Valler, N. Payne, T. Hallett, M. Kobylarski, G. Venkatraman, J. Rappke and D. Fairclough
Event name: 80th EAGE Conference and Exhibition 2018
Session: Seismic Imaging - Case Histories I
Publication date: 11 June 2018
Info: Extended abstract, PDF ( 3.42Mb )
Price: € 20
The presence of injectites is a common and often time consuming area to be addressed during velocity model building. In addition to their impact on deeper structures and prospects, re-worked injectites are increasingly being considered for hydrocarbon potential themselves. In order to handle the challenges above we should consider ways of producing an accurate velocity model of these structures within a framework that is efficient and commercially time-viable. Here we present a holistic approach and case study to model-building in and around injectites that utilizes robust broadband data pre-processing, a semi-automated identification and modeling of injectite bodies and subsequent high-resolution tomographic updating. Our results show that this method enables us to produce a highly accurate and detailed model of a complex injectite field and subsequent improvement on the deeper image within the timeframe of a conventional model building iteration.