TITLE:
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
AUTHORS:
Tayyab Muhammad Naseer, Shazia Asim, Mirza Naseer Ahmad, Farrukh Hussain, Shahid Nadeem Qureshi
KEYWORDS:
Seismic, Attributes, Spectral Decomposition, Lower Goru Strait, Miano, Lower Indus Basin, Channels
JOURNAL NAME:
International Journal of Geosciences,
Vol.5 No.12,
November
25,
2014
ABSTRACT: 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.