A variety of measurements may illuminate the reservoir with varying coverage and resolution such as: electromagnetic (EM); controlled-source EM (CSEM); magnetotelluric (MT), surface-to-borehole EM (STB-EM); crosswell EM; seismic (surface seismic, crosswell seismic, and VSP); gravity (surface and borehole); and production history/well testing data. The interpretation of each measurement on its own will provide incomplete information due to nonuniqueness and limited spatial resolution. However, when integrated and combined with other measurements such as near-wellbore data, they may provide considerable value such as, for example, to enable estimation of reservoir properties, to obtain an improved reservoir model, and to provide a physics-based reservoir upscaling. At the end, it will help us in making appropriate field management decisions with reduced uncertainty.
This presentation will review joint inversion algorithms and workflows for integrating EM, seismic, and production data. It will analyze challenges, advantages, and disadvantages of these approaches. In particular, for reservoir characterization applications, joint structural and petrophysical algorithms for integrating EM and seismic data (CSEM and surface seismic, and crosswell EM and crosswell seismic) will be presented. For reservoir monitoring applications, the talk will describe EM data (for single-well, crosswell and STB) inversion algorithms constrained by the fluid- flow simulator. In the inversion for both EM and seismic, a full nonlinear approach (the so-called full-waveform inversion) will be employed so that all the information in the data can be utilized. Some test cases will be discussed.
About the Author(s)
Aria Abubakar was born in Bandung, Indonesia, in 1974. He received a master’s degree (cum laude) in electrical engineering and a PhD (cum laude) in technical sciences from Delft University of Technology in 1997 and 2000, respectively. From September 2000 until February 2003 he was a researcher with the Laboratory of Electromagnetic Research and Section of Applied Geophysics of Delft University of Technology.
He joined Schlumberger-Doll Research in 2003 and his last position there was as a scientific advisor and the Research Program Manager of Multi-Physics Modeling and Inversion Program. While at Schlumberger-Doll Research, he worked on advanced modeling and inversion of electromagnetic and seismic waves. In addition, he has been developing algorithms and workflows for joint inversion of multiphysics data for both reservoir and wellbore-scale measurements. Since early 2013, he has been Interpretation Engineering Manager and Scientific Advisor at Schlumberger Houston Formation Evaluation in Sugar Land, Texas. He currently is leading Schlumberger Wireline and Logging-While-Drilling product development for electromagnetic, nuclear, and resistivity measurements and their joint inversion and interpretation.
He is Associate Editor of Radio Science and Geophysics. He has published one book, four book chapters, over 75 scientific articles in refereed journals, 150 conference proceedings papers, and 50 conference abstracts. He holds four US patents and has five US patent applications under review. He has presented over 200 invited and contributed talks in international conferences, institutes, and universities.