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Enhancing Seismic Resolution by Using Inverse Q Filtering - A Case Study in Tarim BasinNormal access

Authors: S.Z. Sun, Y.G. Wang, T. Peng, W.K. Yang, C.J. Li, D. Zhang, T. Du and Y.M. Ma
Event name: 77th EAGE Conference and Exhibition 2015
Session: Seismic Attenuation I
Publication date: 01 June 2015
DOI: 10.3997/2214-4609.201413068
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.96Mb )
Price: € 20

Summary:
Given that the complex carbonate reservoirs in Tarim Basin of Western China are usually buried more than six kilometers, the seismic signal would experience serious attenuation and absorption effects during the long-distance propagation, which inevitably limits the resolution of deep reservoirs and degrades the accuracy of reservoir characterization. Therefore, resolution enhancement is a long-standing issue for detailed characterization of this special type of carbonate reservoir. In this paper, we attempt to improve seismic resolution by using inverse Q filtering. Field data applications in ZG8 area demonstrate the effectiveness of inverse Q filtering in enhancing deep resolution by revealing more dissolved carbonate reservoirs and characterizing them more vividly, when compared with traditional methods. The revealed carbonate reservoirs after processing also show a closer correlation with areal faults, which is regarded to be important for karstification to form those dissolved caves.


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