Future Directions of Electromagnetic Methods for Hydrocarbon Applications

For hydrocarbon applications, seismic exploration is the workhorse of the industry. Only in the borehole, electromagnetic (EM) methods play a dominant role, as they are mostly used to determine oil reserves and to distinguish water from oil-bearing zones. Throughout the past 60 years, we had several periods with an increased interest in EM. This increased with the success of the marine EM industry and now electromagnetics in general is considered for many new applications. The classic electromagnetic methods are borehole, onshore and offshore, and airborne EM methods. Airborne is covered elsewhere (see Smith, this issue). Marine EM material is readily available from the service company Web sites, and here I will only mention some future technical directions that are visible. The marine EM success is being carried back to the onshore market, fueled by geothermal and unconventional hydrocarbon applications. Oil companies are listening to pro-EM arguments, but still are hesitant to go through the learning exercises as early adopters. In particular, the huge business drivers of shale hydrocarbons and reservoir monitoring will bring markets many times bigger than the entire marine EM market. Additional applications include support for seismic operations, sub-salt, and sub-basalt, all areas where seismic exploration is costly and inefficient. Integration with EM will allow novel seismic methods to be applied. In the borehole, anisotropy measurements, now possible, form the missing link between surface measurements and ground truth. Three-dimensional (3D) induction measurements are readily available from several logging contractors. The trend to logging-while-drilling measurements will continue with many more EM technologies, and the effort of controlling the drill bit while drilling including look-ahead-and-around the drill bit is going on. Overall, the market for electromagnetics is increasing, and a demand for EM capable professionals will continue. The emphasis will be more on application and data integration (bottom-line value increase) and less on EM technology and modeling exercises.

[1]  Kurt M. Strack,et al.  Array TEM Sounding and Application for Reservoir Monitoring , 2008 .

[2]  Kerry Key,et al.  Marine Electromagnetic Studies of Seafloor Resources and Tectonics , 2011, Surveys in Geophysics.

[3]  Brian R. Spies,et al.  Recent developments in the use of surface electrical methods for oil and gas exploration in the Soviet Union , 1983 .

[4]  M. Virgilio,et al.  Simultaneous Joint Inversion of MMT and Seismic Data for Sub-basalt Exploration on the Atlantic Margin, Norway , 2009 .

[5]  Leonard J. Srnka,et al.  Remote reservoir resistivity mapping , 2005 .

[6]  Tom Eadie.  Detection of Hydrocarbon Accumulations by Surface Electrical Methods - A Feasibility Study , 1980 .

[7]  Sushant M. Dutta,et al.  Novel Transient Electromagnetic Borehole System for Reservoir Monitoring , 2011 .

[8]  Evert Slob,et al.  A Feasibility Study of Land CSEM Reservoir Monitoring: The Effect of the Airwave , 2010 .

[9]  George V. Keller,et al.  Megasource, time-domain electromagnetic sounding methods , 1984 .

[10]  Comparison of PRBS and Square-wave Transient CSEM Data over Peon Gas Discovery, Norway , 2011 .

[11]  A. Abubakar,et al.  Inversion of Porosity And Fluid Saturations From Joint Electromagnetic And Elastic Full-waveform Data , 2011 .

[12]  S. Constable,et al.  Marine magnetotellurics for petroleum exploration Part I: A sea-floor equipment system , 1998 .

[13]  B. R. Spies,et al.  Petroleum exploration using controlled-source electromagnetic methods , 1989, Proc. IEEE.

[14]  L. MacGregor,et al.  Importance of anisotropic rock physics modelling in integrated seismic and CSEM interpretation , 2011 .

[15]  Leonard J. Srnka,et al.  Special Section — Marine Controlled-Source Electromagnetic Methods An introduction to marine controlled-source electromagnetic methods for hydrocarbon exploration , 2007 .

[16]  Daniele Colombo,et al.  Integrated seismic-electromagnetic workflow for sub-basalt exploration in northwest Saudi Arabia , 2012 .

[17]  Ed Morris,et al.  Multi‐transient electromagnetic repeatability experiment over the North Sea Harding field ‡ , 2010 .

[18]  S. Ellingsrud,et al.  Exploring frontier areas using 2D seismic and 3D CSEM data, as exemplified by multi-client data over the Skrugard and Havis discoveries in the Barents Sea , 2013 .

[19]  Alan D. Chave,et al.  Joint inversion of marine magnetotelluric and gravity data incorporating seismic constraints , 2009 .

[20]  K. Christopherson.  Applications of magnetotellurics to petroleum exploration in Papua New Guinea: A model for frontier areas , 1991 .

[21]  G. Hoversten.  Papua New Guinea MT: looking where seismic is blind , 1992 .

[22]  Mikhail Boulaenko,et al.  CSEM performance in light of well results , 2010 .

[23]  Chester J. Weiss,et al.  Mapping thin resistors and hydrocarbons with marine EM methods, Part II -Modeling and analysis in 3D , 2006 .

[24]  Stefan M. Luthi,et al.  Geological Well Logs: Their Use in Reservoir Modeling , 2001 .

[25]  Vertical source, vertical receiver, electromagnetic technique for offshore hydrocarbon exploration , 2009 .

[26]  H. Passalacqua.  Electromagnetic fields due to a thin resistive layer , 1983 .

[27]  D. S. Dasgupta K.M. Strack and G. Yu Colombo.  Results of feasibility study of surface-to-borehole time-domain CSEM for water-oil fluid substitution in Ghawar Field, Saudi Arabia. 9th Middle East Geosciences Conference, GEO 2010. , 2011 .

[28]  Paul Dibb.  The Soviet Union , 1986 .

[29]  Jeremy Lofts,et al.  Deep? How Deep And What? The Vagaries And Myths Of "Look Around" Deep-Resistivity Measurements While Drilling , 2011 .

[30]  B. M. Gottlieb,et al.  Unconventional methods in exploration for petroleum and natural gas III , 1984 .

[31]  Lucy MacGregor,et al.  Sea Bed Logging (SBL), a new method for remote and direct identification of hydrocarbon filled layers in deepwater areas , 2002 .

[32]  K. Strack,et al.  Exploration with controlled-source electromagnetics under basalt cover in India , 2007 .

[33]  T. Hanstein,et al.  Time Domain Controlled Source Electromagnetics for Hydrocarbon Applications , 2011 .

[34]  Ki Ha Lee,et al.  Electromagnetic sounding in the Columbia Basin, Yakima, Washington , 1989 .

[35]  Geophysical model response in a shale gas , 2012 .

[36]  Carlos Torres-Verdín,et al.  Electromagnetic Mapping of Electrical Conductivity Beneath the Columbia Basalts , 1996 .

[37]  R. Herrmann,et al.  Near-Surface Electromagnetic Surveying , 2009 .

[38]  Ashley William Gunter,et al.  Getting it for free: Using Google earth™ and IL WIS to map squatter settlements in Johannesburg , 2009, 2009 IEEE International Geoscience and Remote Sensing Symposium.

[39]  Evert Slob,et al.  A feasibility study of land CSEM reservoir monitoring in a complex 3-D model , 2010 .

[40]  Magnetotelluric imaging of basalt-covered sediments , 1992 .

[41]  P. Gabrielsen,et al.  3D CSEM for Hydrocarbon Exploration in the Barents Sea , 2012 .

[42]  A. Ziolkowski,et al.  Review of vibroseis data acquisition and processing for better amplitudes: adjusting the sweep and deconvolving for the time‐derivative of the true groundforce , 2010 .

[43]  Ki Ha Lee,et al.  A transient EM method with vertical transmitters and receivers for offshore hydrocarbon exploration , 2011 .

[44]  G. Michael Hoversten,et al.  Marine magnetotellurics for petroleum exploration, Part II: Numerical analysis of subsalt resolution , 1998 .

[45]  A. Zerilli,et al.  A new approach to complex structures exploration improves resolution and reduces risk , 2003 .

[46]  S. Constable.  Ten years of marine CSEM for hydrocarbon exploration , 2010 .

[47]  K. Vozoff,et al.  Case histories of LOTEM surveys in hydrocarbon prospective area , 1989 .

[48]  Michele De Stefano,et al.  Multiple-domain, simultaneous joint inversion of geophysical data with application to subsalt imaging , 2011 .

[49]  T. Ritchie,et al.  Mining, Environmental, Petroleum, and Engineering Industry Applications of Electromagnetic Techniques in Geophysics , 2005 .

[50]  G. Michael Hoversten,et al.  Marine magnetotellurics for base-of-salt mapping : Gulf of Mexico field test at the Gemini structure , 2000 .

[51]  K. Vozoff,et al.  Integrating long‐offset transient electromagnetics (LOTEM) with seismics in an exploration environment1 , 1996 .

[52]  George V. Keller,et al.  Electrical Methods in Geophysical Prospecting , 1981 .

[53]  Erik Jan Banning,et al.  Imaging of a subsurface conductivity distribution using a time‐domain electromagnetic borehole‐conveyed logging tool , 2007 .

[54]  Electromagnetic mapping of electrical conductivity beneath the Columbia basalt , 1992 .

[55]  W. Chew,et al.  Investigation on electromagnetic measurement ahead of drill-bit , 2000, IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120).

[56]  James Macnae,et al.  Electrical and EM methods, 1980–2005 , 2005 .

[57]  Kurt Strack.  Advances in Electromagnetics for Reservoir Monitoring , 2010 .

[59]  S. Luthi.  Geological Well Logs , 2001 .

[60]  Otto N. Fanini,et al.  Increased Oil-In-Place In Low-Resistivity Reservoirs From Multicomponent Induction Log Data , 2000 .

[61]  Full frequency-range transient solution for compressional waves in a fluid-saturated viscoacoustic porous medium , 1996 .