Understanding Pore Space through Log Measurements

K. Meenakshi Sundaram holds a Master’s Degree from Andhra University in nuclear physics with specialization in theoretical nuclear physics. He joined ONGC India in 1976 and held several key positions in G&G before retiring in 2012 as Executive Director (Geophysics). He has 19 years of experience in log data acquisition and 17 years of experience in reservoir characterization through logs. He has co-authored 28 technical papers on different subjects including image log interpretation NMR applications, geo-mechanics, and mineralogy, grain size and permeability prediction from logs. He has also guided eight M.Tech. dissertation projects. Soumyajit Mukherjee, PhD, is a Professor of Geology at the Indian Institute of Technology Bombay, India. He has been serving as an Associate Editor of the International Journal of Earth Sciences. His research and editorial experience span 14 years and he has authored and edited 16 books and special volumes. He has been a guest researcher at the Hans Ramberg Tectonic Lab, Uppsala University in 2005-2006. He is the Series Editor of the Elsevier book series Developments in Structural Geology and Tectonics.

• 1. Pore Space and its Classification – Different types of pores and their origin – Concept of different types of porosity – different models of pore space2. Porosity Estimation from Logs – Modelling grain properties and fluid saturation for estimating porosity from logs – Review of techniques of inversion of log data to gross attributes of the pore space3. Pore attributes for conventional reservoirs - Clastic and carbonate rock pore types - concepts of pore size - pore shape – surface to volume ratio – pore connectivity – pore compressibility 4. Pore attributes for non-conventional reservoirs – Tight Gas Reservoirs – Basin Centred Gas Reservoirs – Shale Gas Reservoirs – Coals – surface to volume ratio – pore compressibility 5. An overview of log measurements which help obtain pore attributes in respect of conventional reservoirs6. An overview of log measurements which are essential for understanding pore attributes and pore space attributes of non-conventional reservoirs7. Techniques for characterizing grains and pores from logs 8. Archie’s cementation exponent–importance of, and salient features of effective medium theory based approaches 9. Permeability of unimodal pore system– conventional reservoirs – unimodal porosity - the crucial role this porosity plays in controlling permeability–Permeability and Stoneley wave Propagation.10. Bi-Modal, Tri-Modal Pore Systems, Fractures