Velocity-Porosity and Velocity-Density Relationship for Shallow Sediments in the Kerala-Konkan Basin of Western Indian Margin

Authors

  • Maheswar Ojha
     CSIR - National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007
  • Kalachand Sain
     CSIR - National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007

Keywords:

Empirical Relations, </I>V<SUB>P</SUB>, V<SUB>S</SUB></I>, Porosity, Density, Kerala-Konkan.

Abstract

During the expedition 01 of the National Gas Hydrate Program (NGHP), drilling and coring were carried out at one site in the Kerala-Konkan basin on the west cost of India to validate gas hydrate. Drilling/coring results show a homogenous sequence of oozes and explains that the reflector, which was identified as a bottom-simulating reflector (BSR) on seismic section, is mainly due to changes in formation density because of less clay content in carbonate-rich sediment. Downhole logs collected at this site are of good quality and have been used to establish empirical relationship between the P-wave velocity (VP), S-wave velocity (VS), density (Ï) and porosity (Φ). The established relations show very good fit with high R2 value (>0.73), and can be used for further studies in this region. Well known existing empirical formulas between VP, VS, Ï and Φ deviate significantly from our established relations.

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Issue

Volume 84, Issue 2, August 2014

Section

Research Articles

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Published

2014-08-01

How to Cite

Ojha, M., & Sain, K. (2014). Velocity-Porosity and Velocity-Density Relationship for Shallow Sediments in the Kerala-Konkan Basin of Western Indian Margin. Journal of Geological Society of India, 84(2), 187–191. Retrieved from http://www.geosocindia.com/index.php/jgsi/article/view/57005

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