2D Seismic Reflection Data Interpretation(Part-II)
Types Of Rocks
Types Of Rocks & Physical Processes Can Be Interpreted By The Crossplots Of Poisson’s Ratio And Vp / Vs Ratio
Lower Goru Scenario
The Lower Goru Position Has Been Determined By The Same Properties, It Lies In The Intermediate Rock Type As The Poisson’s Ratio And Vp / Vs Ratio Values Lies In That Range
P-S Reflectivities
The P-S Reflectivity Contrast With Varying Angle Of Reflectivity Is Strongest For Soft Rocks And Weakest For Hard Rocks. This is Due To Increasing Softness Of Soft Rocks
Differentiated Seismic Section
Seismic Section Was Differentiated Into Soft, Intermediate And Hard Rock Type By Plotting The Results Of Each CDP Against Time
Part-IV
Stratigraphic Description Of Lower Goru Formation By Rock Physics
The Rock Physics Parameters
The Contouring Of Rock Physics Parameters i.e P-Wave Velocity, S-Wave Velocity, Shear Modulus, Bulk Modulus, Poisson’s Ratio And Vp / Vs Ratio has been performed. The Central portion of the figures have closures. These closures suggest the anomalous zone. By combining all the Rock Physics parameters we can assign the lithology to the anomalous zone and may suggest the presence of gas.
Contours Of P-Wave Velocity
Contours Of Poisson’s Ratio
We Can Suggest The Type Of Lithology From The Values Of Poisson’s Ratio, The Closures Of Values Ranging Between 0.23-0.27 Suggest The Presence Of Sand Bodies, Many Gas Wells Are Located Inside These Closed Contours, Indicating The Presence Of Gas Sand Bodies In This Area
Contours Of Shear Modulus
Contours Of Vp / Vs Ratio
Vp / Vs Is Another Lithology Indicator. We Can Detect The Presence Of Gas Sands In The Subsurface
Lithology Map
Lithology Map Has Been Prepared By The Combined Interpretation Of Rock Physics Parameters. The Lithologies Are Identified By The Values Of Poisson's Ratio. These Separate Lithologic Zones Are Given Names On The Basis Of Values Of Vp / Vs
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