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Seismic Interference Prediction Through Finite Difference Modeling: Optimizing Operations In Barents SeaNormal access

Authors: M. Buia, A. Ravasio and P. Bini
Event name: 77th EAGE Conference and Exhibition 2015
Session: Seismic Modelling - Applications II
Publication date: 01 June 2015
DOI: 10.3997/2214-4609.201413304
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.46Mb )
Price: € 20

Summary:
When acquiring seismic data in crowded areas, interference need to be considered, due to its negative impact on data quality. Time-sharing represents a very expensive remedy. A "before survey" prediction of interference is important to properly plan acquisition and reduce time-sharing cost. A FD modelling based approach to predict interference is presented. The method has been applied in the Barents Sea, helping to optimize survey efficiency. The workflow can be summarized as follows: 1)3D earth model building: Vp, Vs, and density volumes were built. 2)Earth-model verification and fine tuning through FD modeling: simulated shots were compared and calibrated with co-located 2D real seismic data, to verify and fine tune the earth model and the interference mechanism 3)3D FD modeling of seismic interference: extra-long interfering synthetic shots were computed using the pre-built earth model. 4)Generation of curves and maps summarizing results: amplitude curves versus distance and maps of interference harshness, were created to formulate suggestion for an optimized SIMOPS plan 5)Actual interference monitoring and modeling results verification: the actual interference was measured during the survey acquisition and compared with the predicted ones in order to verify in practice the accuracy of the modeling outputs.


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