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Application of Seismic Attributes for Delineation of Channel Geometries and Analysis of Various Aspects in Terms of Lithological and Structural Perspectives of Lower Goru Formation, Pakistan

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International Journal of Geosciences 2014年第12期5卷 1490-1502页

作者： Tayyab Muhammad Naseer Shazia Asim Mirza Naseer Ahmad Farrukh Hussain Shahid Nadeem Qureshi Department of Earth Sciences Quaid-I-Azam University Islamabad Pakistan China University of Geosciences Wuhan China School of Sciences Nusrat Jahan College Rabwah Pakistan Deewan Petroleum Limited Islamabad Pakistan COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan

miano area is one of the distinct major hydrocarbon producing fields of the Lower Indus basin. Lower Goru is the reservoir strait in this area. The aim of the present study is to exploit the channels reservoirs and other stratigraphic features in such a terrain where there is always a challenge for the geoscientist to search and exploit the channeled reservoirs. To resolve this issue we have utilized attribute analysis on high resolution 3D-seismic data for the detailed comparative studies for the channels. There are many astonishing features that are identified in the current study, which could not otherwise be easily enhanced with the help of 2D Seismic Data. Seismic attributes such as coherency, frequency (are also appropriate for lithological discrimination), which are sensitive to the channel edges are applied for the channel delineation and their geometrical analysis. Spectral decomposition techniques are also applied for the delineation of channels and to appropriately select the best band for channels identification. Three types of channel geometries are recognized: 1) highly sinuous channel;2) narrow-broad meandering belts;3) moderate to high sinuous channel. NW-SE, N-W trending faults can be helpful to compartmentalize the reservoir. Instantaneous and dominant frequency are more beneficial for further field development based on Gamma Ray logs from nearby drilled wells and dimensional perspectives analysis of the channel reservoir.

关键词： Seismic Attributes Spectral Decomposition Lower Goru Strait miano Lower Indus Basin Channels

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