3D-PS Converted Waves – Solving 3D-imaging Challenges under Gas Clouds - Offshore Malaysia

• DOI: 10.3997/2214-4609.20140639
• Publication Date: 2014-05-22T12:20:51Z
• Authors: M.F. Akalin; A.A. Muhamad; Y.C. Tan; Y.B.M. Yusoff; N.A.M. Radzi; S.F.M. Zohdi; M.H. Hashim; M. Ghazali; S. Maitra; A. Wardoyo; M.L. Ghazali; J.V.S. Murthy; G. Wang; X.G. Miao
• Keywords: Gemology

Summary In offshore peninsular Malaysia there are strings of major hydrocarbon bearing fields which affected by shallow gas clouds. This poses a problem in imaging using the P-wave data from conventional streamer or OBC 2C surveys suffer frequency dependent attenuation, multipathing, scattering, internal multiples, velocity inversions and mode conversions due to charged sediments. 2D–4C is proven be useful areas where 2D-PS-wave provides clearer image as compared 2D-P-wave imaging. Imaging 3D-PS-converted-wave presents its own unique challenges discourage companies processing converted wave component 3D–4C-OBC data. Through this case study we showcase three processes have brought about significant improvements 3D PS-wave time-imaging outline results 3D-PS-PSDM depth-migration, rendering highly for interpretation inversion work inside cloud area.