Four out of top five revenue generating companies in the world in 2013 are from oil and gas sector, and they together play measure role in shaping the world economy. The primary goal of oilfield exploration is to identify and quantify hydrocarbon reservoirs and to estimate their producibility. Although this talk considers examples from oilfield industry, the methodologies may have wide range of applications in areas related to measurement, evaluation, imaging, and monitoring of remote objects. In a typical exploration, a wellbore (about 15 to 30 cms in diameter) is drilled through earth formation to a depth that may extend to a few kilometers. Estimation of earth formation properties (conductivity, porosity, saturation, permeability, pressure, etc.) and the placement of the wellbore in a desired earth layer are challenging problems – both in terms of designing the associated sensors, and transmitting, processing and interpreting the acquired data. These challenges are described and illustrated through several examples. The talk will begin with an overview of oilfield industry and operation. Modeling and simulation techniques as applied to sensor design will be presented. Once a sensor is designed, it is yet another challenge to interpret the acquired data. Inverse problems associated with such measurements are often ill-posed, nonunique, and multimodal. Issues pertaining to inverse problems will be briefly discussed.
Jaideva C. Goswami received his Ph.D. in Electrical Engineering in 1995 from Texas A&M University. After spending one year at the University of Illinois at Urbana-Champaign as a Visiting Research Fellow, he joined Schlumberger in 1996 where he is currently an Engineering Advisor and Global Métier Manger for Modeling and Simulation. He also manages the multi-center innovation and university relation programs. He is a former Professor of Electronics and Communication Engineering at IIT, Kharagpur and has held research and teaching positions at IIT, Kanpur and NIT, Surat. Besides publishing over fifty papers in Journals and Conference proceedings, he has contributed three book chapters and is a co-author of the book “Fundamentals of wavelets: Theory, Algorithms and Applications,” New York: John Wiley, 2^nd Edition, 2011. He holds 12 U.S. Patents. He is currently an Associate Editor of IEEE Transactions on Antennas and Propagation. His research interests include multiphysics modeling, inverse problems, signal processing, wireless telemetry, subsurface sensor design and data analysis, and nuclear magnetic resonance. Dr. Goswami is a Fellow of IEEE and a member of Society of Petrophysicist and Well Log Analysts.