15-20 August 2010
Snowbird, Utah

This five-day meeting in Utah will include proposed topics such as:

• Sourcing low frequencies both actively and passively
• Capturing low frequencies in acquisition
• Preserving signal and suppressing noise in processing
• Enhancing low frequency content with other geophysical measurements
• Utilizing low frequencies in imaging and inversion
• Applying low frequencies and making a difference

SEG eBooks beta launched in early February 2010 with approximately 35 books, and SEG plans to add 15 more titles within two months. SEG will add new books online as they are published in print and plans to add legacy titles in the years ahead.

SEG eBooks content is searchable via its own search engine or with those covering the SEG Digital Library and Scitation. Browsing is available by title, year, series, and topic. Introductory material and back matter (mostly indexes and references) are free.

Joint SEG/SPE/AAPG Workshop

Submit your abstract by 5 March to participate in the upcoming “Joint SEG/SPE/AAPG Workshop on Shales: Seal, Reservoir, Source,” 6-9 June in Austin, Texas. The 5 March deadline is fast approaching, apply now.

Now accepting applications for the 2010 D&P Forum
Submit your application before 31 March for the 2010 D&P Forum: CO₂ EOR & Sequestration, taking place 18-22 August in Boston, USA.

2010 Summer Research Workshop
Submit an abstract for the upcoming workshop “Subsalt Exploration and Development: Four years later, what’s new in acquisition, imaging, and interpretation?” scheduled 26-29 July at the Squaw Valley Resort in Lake Tahoe, California, USA. The deadline to submit is 20 April.

Denver 2010 Annual Meeting call for papers
The Technical Program Committee invites you to submit your papers for consideration beginning in March. Start preparing your papers for submission by reading the 2010 Abstract Kit.

Mapping reservoirs based on resistivity and induced polarization derived from continuous 3D magnetotelluric profiling: Case study from Qaidam basin, China

Zhanxiang He,¹ Zuzhi Hu,¹ Weifeng Luo,¹ and Caifu Wang^1
1China National Petroleum Corporation, GME department BGP, Zhuozhou, China.

In Sanfu, Qaidam basin, China, traditional geophysical methods have failed to find subtle hydrocarbon reservoirs. In an attempt to predict anddelineate gas reservoirs, we used a type of magnetotelluric (MT) profiling called 3D continuous electromagnetic profiling (CEMP). Electric logs indicate that gas-bearing formations have high resistivity relative to nongas-bearing formations.

Modeling and analysis of the response of a triaxial, frequency-domain electromagnetic induction sensor to a buried linear conductor

Sean P. McKenna¹ and Jason R. McKenna^2
1Northrop Grumman Information Systems, Andover, Massachusetts, U.S.A.
²U. S. Army Engineer Research and Development Center, Vicksburg, Mississippi, U.S.A.l

This paper presents analytical modeling results for a triaxial frequency-domain electromagnetic-induction (EMI) sensor over a homogeneous earth containing a long linear conductor. Although the conductor studied is intended to represent an underground wire or pipe, it can represent any subsurface, linear geologic structure that can channel current.

Comprehensive approaches to 3D inversion of magnetic data affected by remanent magnetization

Yaoguo Li,¹ Sarah E. Shearer,²

¹Colorado School of Mines, Center for Gravity, Electrical, and Magnetic Studies (CGEM), Department of Geophysics, Golden, Colorado, U.S.A.
²Formerly Colorado School of Mines, Center for Gravity, Electrical, and Magnetic Studies (CGEM), Department of Geophysics, Golden, Colorado, U.S.A. Presently Ultra Petroleum Corp., Denver, Colorado, U.S.A. E-mail:

Three-dimensional (3D) inversion of magnetic data to recover a distribution of magnetic susceptibility has been successfully used for mineral exploration during the last decade. However, the unknown direction of magnetization has limited the use of this technique when significant remanence is present. We have developed a comprehensive methodology for solving this problem by examining two classes of approaches and have formulated a suite of methods of practical utility.

Leveling HEM and aeromagnetic data using differential polynomial fitting

Majid Beiki,¹ Mehrdad Bastani,¹ and Laust B. Pedersen^1
1Uppsala University, Department of Earth Sciences, Geophysics, Uppsala, Sweden.

We introduce a new technique to level aerogeophysical data. Our approach is applicable to flight-line data without any need for tie-linemeasurements. The technique is based on polynomial fitting of datapoints in 1D and 2D sliding windows. A polynomial is fitted to data points in a 2D circular window that contains at least three flight lines.

Extraction of structure-based geoelectric models by hybrid genetic algorithms

Irfan Akça¹ and Ahmet Tuğrul Basokur^1
1Ankara University, Faculty of Engineering, Department of Geophysical Engineering, Tandogan Kampusu, Ankara, Turkey.

A major difficulty in electrical resistivity imaging is the identification ofthe lithologic units, especially in the sedimentary environments. The geologic interpretation generally is realized by visual inspection of the final resistivity section. Although sharp boundary inversion techniques based on a local linearization could allow the delineation of interfaces between geologic units, these techniques will succeed only if an initial model already close to the best solution is available.

The Misadventures of Interpreter Sam (SEG Geophysical Monograph Series No. 15) is a collection of the first six years of “Interpreter Sam” columns from THE LEADING EDGE. It contains commentary on both the humorous and serious sides of an interpreter’s day from the point of view of the fictitious Interpreter Sam, our Everyman of interpretation. Sam introduces each chapter with a caricature of himself (an interpretation of his own “reflection,” if you will, created by the talented artist David Carman), and in the epilogue, he offers a special gift to his friends in data processing. This book can be read and enjoyed by anyone who has ever interpreted even a single seismic line, by eager students who aspire to be interpreters, and by nongeoscientists who presume that they know how interpreters think.

The Society of Petroleum Engineers (SPE) and the Society of Exploration Geophysicists (SEG) have formalized an agreement for intersociety cooperation to benefit their global membership through joint events, programs and services. “This is an exciting opportunity for both societies to build on an already strong relationship to enhance technical knowledge exchange globally that will benefit our members and serve the upstream oil and gas industry,” said Behrooz Fattahi, 2010 SPE president.