Technical Meeting, Co-sponsored by LGS, Wednesday 3/21/2017

March 8th, 2018

The March SWLGS speaker is Dr. Carl Fiduk with a talk entitled “A reversal in the roles of salt and sediment in the northern Gulf of Mexico: the rare effect of allochthonous salt advancement and inflation on over-pressured sediment”. The luncheon starts on Wednesday 3/21/2018 at 11.30 am in the Petroleum Club of Lafayette. Thanks for coming out!


In almost every basin in the world that contains evaporites, it is the evaporites which get deformed by sedimentation. A typical simple scenario would be for a) evaporites to be deposited, b) clastic and/or carbonate sediments to be deposited on the evaporites, and c) the evaporites to begin deforming into diapiric and then allochthonous salt features. However, it is possible for the roles of salt and sediment to be reversed. An advancing salt body can provide the load that causes deformation to underlying strata. This unusual reversal of roles has been observed and documented in the deep northern Gulf of Mexico basin. The full abstract is here: 2018 3-22 Lafayette_SaltKeel_abs_Fiduk

Speaker bio: Dr. Carl Fiduk

Carl Fiduk is an independent consultant and owner of Fiduk Consulting, LLC. Carl was previously an explorationist at Gulf Oil, BP, and Freeport McMoran, and Chief Geologist at CGG, CGGVeritas, and WesternGeco. To his clients he provides expertise on petroleum exploration, salt tectonics, marine depositional processes, basin analysis, seismic interpretation, seismic processing, and structural geology. He earned his B.A. and M.S. in geology from the University of Florida, an M.B.A. from The University of Texas
Permian Basin, and a Ph.D. in geology and geophysics from The University of Texas at Austin. He has explored in almost all the major salt basins of the world. He has published just at 100 peer reviewed abstracts/papers and is a past AAPG Distinguished Lecturer.

October 2017 Newsletter

October 6th, 2017


Technical Meeting and Luncheon Tuesday 10/10/2017

October 6th, 2017

The October SWLGS speaker is Tim Bennett with a talk entitled “Foundered Shelf Edges; Seismic Expression of a Frio Example, Louisiana”. The luncheon starts on Tuesday 10/10/2017 at 11.30 am in the Petroleum Club of Lafayette. We hope to see everyone there!

Foundered shelf edges are a geomorphic event that can be sudden in occurrence. They are a result of a rapid shifting of the shelf edge landward. This shift of the shelf edge is a result of a mass wasting of the prior shelf and erosion of underling deposits. Various geologic features are formed with the failure of the shelf into deeper water. These include slump blocks, ramping and erosion. This new mini basin then results in an accommodation space that is filled with slope fans, proximal shore face grain stones and prograding wedges. Capping the sequence is a highstand deposit that is more regional in extent.
Download full abstract here: Abstract Foundered Shelf Edges Bennett SWLGS October 2017

Speaker bio Tim Bennett:


I am a working exploration geologist with 35+ years on the trail. My geologic curiosity began in New Jersey, receiving a BS in Earth Science from Farleigh Dickinson Univ. and then an MS in Geology/Geophysics from Wright State Univ. in Dayton, OH. My work experiences include Union Oil Company for 20+ years, then Independent when oil hit $12.50 back in ’98. I have consulted for numerous companies as an independent since then. Among them I spent six years with Fife Oil Co. and ten years with Orbit Energy, Inc.
My exploration history has focused on the Louisiana Gulf Coast, from the Glenn Rose reef trend to offshore’s deep water Paleogene. I have focused on seismic stratigraphy these last few years with a very large 3D data base I have been fortuned to have at my disposal. I have made numerous presentations of my discoveries and analyses to the geologic societies.
I have been very lucky to be able to give back to the community of future earth scientists. I have had the pleasure of 33 graduate student interns from the University of Louisiana at Lafayette come through my shop over the last eleven years. I am proud to say, most of them are gainfully employed.


Welcome to the 2017/2018 SWLGS Season!

August 10th, 2017


Dear SWGLS Members,

Hello everyone and welcome to the 2017-2018 SWLGS year! I feel very honored serving serving the fourth term as the president of SWLGS. I have had the pleasure of working with our board members Brian Brennan (Vice President and Editor), Tim Bennett (Treasurer), Samantha Leone (Secretary) and Steve Anderson (President-Elect) and many others that donate their time and vision to the well-being of the society. Needless to say we always welcome your input and invite you to participate with the planning and organization of our society.

More news on our society’s functions and activities later.

Carl Richter

President Southwest Louisiana Geophysical Society


Seismic Petrophysics Short Course Update –

October 19th, 2016

A few last minute details:

Class Schedule

We will start the class at 8:00 AM.  Please plan to arrive early to give yourself plenty of time to park, get a cup of coffee and a snack, check emails, and take care of whatever else your morning routine dictates.

We plan to go until about 4:30 PM Thursday, and about noon Friday.



Free parking is available in the Olivier Parking Tower, a short walk away from the UL Student Union, where the class will be held. Parking on campus can be a challenge, so we recommend you take advantage of this perk.  (Campus map attached)

Parking Instructions: Your guests may park in Olivier Parking Tower on the first or second floor using code 1020#, if no spots are available then they may park in the EK Long lot.  

Location of the Class

The class will be held in the Teche Room on the first floor of the UL Student Union. (Building map attached)


Dining and Refreshments

In the interest of keeping class expenses low, we have not arranged for refreshments or meals for the class.  However, there is a Starbucks coffee shop in the Union and there are snacks available there and at other places in the Union.

We will break for lunch on Thursday, but, as mentioned, lunch will not be served for the class attendees.  There are several good, inexpensive choices for lunch within the Student Union.  Campus is a busy place at lunchtime, so if you venture out of the Union for lunch you risk returning late to the class.

If you have any questions please send me an email. 

This should be a great class.  Whether you’re a student or just getting started in the business and need a primer on rock properties and seismic data, or you’ve wrestled with the concepts and realities of tying well log information to seismic data, you should get a lot out of this class.


Thanks for supporting our societies.




Brian Brennan


campusmap2016cj            ul_student_union_map


September 28th, 2016

Where: Petroleum Club of Lafayette

When: 11:30am

Lunch: $20.00 for members

** Bring your 2016-2017 Member Dues!!!**

Luncheon Talks:

Seismic-Based Porosity Prediction in the Silurian Niagaran Formation Reefs of Northern Michigan: An Integrated Case Study




Doug Paul


Doug Paul received a Hon B.Sc. in Applied Earth Science from the University of Waterloo, Waterloo, Ontario, Canada. He worked extensively in the early development of EOR processes with the Alberta Oil Sands Technology and Research Authority (AOSTRA) providing geologic insight into complex reservoir simulation models. After working in conventional geological exploration and development, Doug moved into technology side of the business with Landmark Graphics in Calgary and Houston specializing in the integration of geophysics and geology. He then cofounded Photon Systems in Houston before returning to Calgary when Photon merged with CogniSeis. In 1997 Doug started a consulting company providing interpretation and data management services to Sable Offshore Energy, Mobil, Chevron, Shell, ExxonMobil, and Norsk Hydro, primarily focusing on the Canadian east coast offshore. He consulted for SeisWare and joined them full time in 2007 and opened SeisWare’s US office in Houston providing geoscience interpretation software to the American oil and gas industry.


Doug has authored and presented papers at SEG, CSEG, CSPG and numerous regional symposiums and forums in addition to coauthoring papers with clients showcasing applied, integrated technologies. He is member of the Society of Exploration Geophysicists (SEG), HGS, and other regional geoscience societies throughout the US and Canada.



SWLGS Short Course

September 28th, 2016

Critical Aspects of Seismic Petrophysics:
Rock Properties from Seismic Data

A continuing education class offered by
the Southwest Louisiana Geophysical Society and the Lafayette Geological Society

Dates: Thursday, October 20, 8 AM – 4:30 PM

Friday, October 21, 8 AM – Noon

Place:University of Louisiana – Lafayette Student Union*

Course cost: $100

Instructor:   Dr. Wayne Pennington, Michigan Tech

  • General rock-property relationships — velocities, porosity, and moduli
  • Averaging of constituent properties — Gassmann fluid substitution
  • Sonic logging – compressional and shear
  • Inversion — acoustic and elastic
  • Interpretation of inverted data for rock properties

    Excerpted bio:

• Dr. Pennington has served as the President of the American Geosciences Institute and as the First Vice President of the Society of Exploration Geophysicists. He was a Jefferson Science Fellow at the US Department of State and the US Agency for International Development. He has published dozens of peer-reviewed papers and coauthored one book with two of his students. His degrees in Geology and Geophysics are from Princeton University, Cornell University, and the University of Wisconsin

To register for the class,

Pay Online at


contact Brian Brennan at

* Parking available on campus


LGS and SWLGS BBQ Ice Breaker

September 14th, 2016

When: Thursday September 22, 2016

Where: Vermillionville (Next to Beaver Park)

Tickets ($20) available from:

Lafayette GRC– 233-8197 201 Heymann Blvd.

Mack Energy Co – 988-9260 3861 Amb. Caffery Pkwy.

Stone Energy – 237-0410 625 E Kaliste Saloom Rd,

Acadian Log Library – 233-1430 117 Heymann Blvd.

ULL Geology Dept. – 482-6647 Hamilton Hall
For additional Locations or information call John Hollier @ 781-8615

—————————————————————— Sponsors Needed and Available

Platinum: $1000, Gold $500 – $999, Sliver: $250-$499, Bronze: $100 – $249 Bar Sponsor: $Available

*Sponsors will be recognized at the barbeque, on the LGS website and in the LGS bulletin. Your Sponsorship is greatly appreciated!!!

TECHNICAL MEETING AND LUNCHEON: Tuesday, September 13, 2016

August 30th, 2016

Where: Petroleum Club of Lafayette

When: 11:30am

Lunch: $20.00 for members

** Bring your 2016-2017 Member Dues!!!**

Luncheon Talks:

True Depth Processing

By: Thomas Charlton

TruDepth is Geotrace’s (Stein et al 2013, Hellman et al 2015) new workflow incorporating anisotropic technology that harnesses the power of Kirchhoff prestack depth migration (KPSDM) and true depthing into one single tool. This methodology derives and then uses the anisotropic parameters δ & ε using prior information including wells, tops and VSP’s to produce depth corrected seismic volumes that are not just structurally accurate but they match the geological tops coming from the wells.

Case histories with examples will be presented.

True depth achieved using anisotropic depth migration (2013), J. A. Stein, K. Hellman, S. Boyer and T. Charlton, First Break 31, 10.

Single Pass Multilayer Determination of Anisotropic Velocity Models with Well Constraints (2015), K. J. Hellman, J. A. Stein, T. H. Charlton and S.T. Boyer, 77th EAGE Conference


Speaker Bio:                                          

                                                               Thomas Charlton 
Present Position:                  General Manager Land Processing
Education/Qualifications:   University of Calgary & University of Iowa
Experience:                           Joined Geotrace in 2010 with 21 years industry experience


Tom processes both 2D and 3D datasets, specializing in structured land surveys with noise and static issues.  Since 1994 he has supervised processing groups in Nigeria, Mexico and Canada. He has been responsible for all aspects of data processing including designing AVO compliant run streams for both land and marine surveys.  He has considerable experience in dealing with data from Europe, Africa, and the Americas as well as in reflection/refraction statics computations and pre-stack/post-stack time migration processes.  Tom is a member of both the CSEG and the SEG.


May 7th, 2016

Where: The Petroleum Club of Lafayette

When: 11:30am

Lunch: $20.00 for members ** Be Sure to Bring Your 2015-2016 Membership Dues!**

Luncheon Talks:  

 Detailed Velocity Model Building with Full Waveform Inversion

An accurate earth model is key to any successful depth imaging effort. Full-waveform inversion (FWI) is an advanced velocity model building process that uses the full two-way wave equation. Traditional methods use a ray-tracing approach to distribute velocity errors within the model.

The industry has moved to using two-way wave-equation migrations commonly known as reverse time migration (RTM), especially in areas of complex geology such as the salt bodies in the Gulf of Mexico, offshore West Africa, Brazil, and the Red Sea. The velocity model, including velocity anisotropy, is key to any depth migration effort. The natural next step is to use the two-way wave equation for velocity model building too. One of the most advanced tools for velocity model building using the two-way wave equation is full-waveform inversion. Full-waveform inversion uses computer-intensive forward modeling of the seismic measurement combined with residual wavefield back propagation to iterate to a final velocity model, which can provide greater detail than tomographic ray-tracing approaches.

FWI has recently emerged as one of the most exciting new techniques in the seismic industry thanks to its potential to deliver very detailed velocity models. It is also a paradigm shift in a way we process seismic data since it allows us to start the velocity model building phase on raw shots, with little need for pre- processing steps.

Most of the examples shown in literature are based on FWI applications where the starting velocity models for the inversion are derived by several iterations of traveltime tomography and are kinematically accurate. The reason for this is that FWI relies on solving a highly non-linear inverse problem using a gradient based technique; therefore it is very sensitive to the presence of local minima. These occur when the data predicted by the starting model differ in arrival time by more than half a cycle with respect to the real data.

Comparison between migrations using FWI velocities derived in this way and migrations using the starting tomographic models often yield disappointingly small differences, even though the FWI velocities appear to contain a lot more “geological” detail. Analysis of Common Image Point (CIP) gathers shows traveltime tomography is usually doing a good job at recovering long wavelengths of the velocity model which account for the bulk of the gather flattening required for a good image. There are particular settings where tomography struggles and where FWI can instead provide an accurate solution. We include two different examples below where we see FWI as a real game changer: