The Southeastern Geophysical Society

SGS Monthly Technical Luncheon

Please join SGS for our November 2016 SGS luncheon on Thursday, November 10th at 11:30am at Bayou Ballroom on the 8th floor in Holiday Inn, 330 Loyola Ave. This month’s talk will be given by Alistair R. Brown, Consulting Reservoir Geophysicist, and is titled "From Bright Sports to Dim Spots”. If you’d like to attend, kindly RSVP via email to Mike Schneider( by noon on Tuesday, November 8th.

November 2016 SGS Luncheon


From Bright Sports To Dim Spots


Alistair R. Brown, Consulting Reservoir Geophysicist


Changing water in the pores of a rock for hydrocarbon always decreases acoustic impedance. If the reservoir rock is encased in another rock of higher impedance, then the change in fluid increases the contrast and thus the observed seismic amplitude. This we call a bright spot, and we all know that bright spots have been used to discover much hydrocarbon. If the reservoir rock is encased in another rock of lower impedance, then the change in fluid decreases the contrast and thus the amplitude. This produces a hydrocarbon dim spot.

The impedance of sands tends to be less than that of shales for younger rocks, but, as the impedance of both increase with depth and age, the compaction curves have different gradients and tend to cross. This means that in older rocks sands have higher impedance than shales, and thus dim spots should be the observable seismic phenomenon. Also the magnitude of the impedance change caused by the fluid is less for deeper rocks. ‘Deeper’ also means that the signal-to noise is poorer and the resolution is poorer. So hydrocarbon dim spots are difficult to recognize and to study. However, in the geology of the world there are more high impedance sands than there are low impedance sands, so there should be plenty of dim spots indicating hydrocarbon reservoirs. The reason why we have not exploited more of them is just because they are difficult.

A bright spot is easy to recognize on the basis of its high amplitude, although we must conduct much validation before concluding that the prospect should be drilled. A dim spot on the other hand does not attract attention because of its amplitude, but may do so because of the unconformability of its fluid contact reflection. This is the best hope we have of recognizing hydrocarbon dim spots in the future. The author believes there are significant reserves of hydrocarbon indicated by dim spots waiting to be found, probably deeper in existing petroleum provinces.


Alistair R. Brown is a Consulting Reservoir Geophysicist working out of Dallas, Texas. His specialties are interpretation of three-dimensional seismic data, stratigraphic interpretation, optimum use of interactive workstations, seismic reservoir identification and evaluation, and the meaning of seismic amplitude. He spends much of his time teaching interpretation methods and advising on interpretation problems worldwide. Alistair graduated from Oxford University in England, having attended The Queen's College, and now has 50 years of geophysical industry experience. He has been using 3D seismic data since 1975 and interactive workstations since 1980. He has developed many new interpretation methods and is a widely-published author in his field. The making of the first horizon slice in 1979 was a particular accomplishment. The Seventh Edition of his book Interpretation of Three-Dimensional Seismic Data (AAPG Memoir 42 / SEG Investigations no. 9) was published in 2011 following previous editions in 2004, 1999, 1997, 1992, 1989, and 1986. He won the SEG Best Presentation Award in 1975, was AAPG Distinguished Lecturer in 1988, SEG Distinguished Lecturer in 1991, Petroleum Exploration Society of Australia Distinguished Lecturer in 1994, and inaugural Joint AAPG/SEG Distinguished Lecturer in 2000. In 1998 Alistair was awarded SEG's Special Commendation Award for his work in developing and teaching 3-D methods. In 2002 he was awarded Honorary Membership in the Geophysical Society of Houston, and in 2016 was the honoree at their Spring Symposium. Dallas Geophysical Society has awarded him both Honorary Membership and the Distinguished Service Award. In 2006 he received his highest honor, namely Honorary Membership of the Society of Exploration Geophysicists. In 2009 AAPG awarded Alistair their Distinguished Service Award. He has been Chairman of THE LEADING EDGE Editorial Board, editor of the Geophysical Corner in AAPG EXPLORER, and on the Editorial Board of INTERPRETATION.



SGS & NOGS are looking for enthusiastic women geology role models for the Girl Scouts Louisiana East B.I.G. - Believe In Girls event at Southeastern University in Hammond Saturday September 24th.

Volunteers are needed for 3 hour shifts. This is a fun filled learning experience where the girls will learn about the properties of oil, its presence in rocks and how oil fields are created. We will be joined by The Southeastern Geophysical Society and The Society of Petroleum Engineers Delta Chapter. The event is STEM (Science Technology Engineering and Math) focused with over 30 science industry careers and 1,400 inquisitive girl scouts.

Please join this fun filled event!

If you would like to volunteer, please contact Lisa Kennedy to be placed on the schedule. 504-782-7100 call or text . Volunteers are needed in 2 shifts:
9:30am - 12:30pm
12:30pm - 3:30pm

You are also welcome to join me all day if you would like!



August 18th, 19th & 20th 2015

Hilton Riverside New Orleans

Geoscience Opening Seminar, August 18

“The Temporal and Spatial Evolution of Reservoirs and Traps, Northern Deep Water Gulf of Mexico” with Paul Weimer, University of Colorado

This course will summarize the temporal and spatial evolution of the reservoirs for the 220 fields in the northern Deepwater Gulf of Mexico. Lectures and exercises will address the key components of each of the major reservoirs by age. The trap types for all of the fields are reviewed and placed within their regional context and exploration province type.

Tickets for the Geoscience Seminar are $225.00 and can be purchased along with your DWTS registration at


Download an SGS Scholarship Application form to apply. Scholarships are made possible by corporate donations and member sponsorship of our Golf Tournament Fundraiser held in the Spring.

Don't forget scholarship applications are due April 30th! As a reminder, children and grandchildren of all current SGS members that are entering college or currently attending college or graduate school can apply for an SGS scholarship - regardless of their child/grandchild's major!

Applications are reviewed and awarded by the SGS Scholarship Committee based on academic achievement, community service and/or employment history, extracurricular activities, and financial need. Applications will not be considered unless the required transcripts and letters of recommendation are received by the Committee by the deadline. The form and supporting documents must be received by the Scholarship Committee by April 30th. Note - It is also the responsibility of the SGS sponsor to keep their membership current. If you are an SGS member sponsoring a scholarship applicant, but are unsure if your membership is current, please contact Pamela Bucher ( to determine your membership status.

Scholarship Application Process:
1. Ensure your SGS membership is current and that your child/grandchild meets the eligibility requirements (see below)
2. Complete the scholarship application form
3. Gather the required supporting documents (a list of the required documents for each educational level is provided in Section Two on the attached scholarship application form).
4. Deliver the application form and supporting documents to a member of the Scholarship Committee via hand delivery, email or mail-in. The 2015-2016 SGS Scholarship Committee Members are:
Robin Broussard, Current SGS President (
Toby Roesler, Past SGS President (
Julius Doruelo, Prior Past SGS President (
5. Mail-in forms and documents can be sent to the following mailing address and must be post-marked April 30th for consideration: SGS Scholarship Committee, P.O. Box 57141, New Orleans, LA 70157

Eligibility Requirements:
Applicant is enrolled or planning to enroll in college for the next academic year.
Applicant is one of the following:
High school senior planning to attend college next fall
Undergraduate or graduate college student
Applicant has not been a previous recipient of an SGS Scholarship award.
Applicant is a daughter/granddaughter or son/grandson of a current SGS member.

If you are unable to participate in the SGS Fundraising Golf Tournament, but would like to donate personally to the Scholarship Fund, you can do so by check, cash or online payment via credit card. To donate funds to the SGS Scholarship Fund online, click the donate button below:

The SGS thanks you all for supporting local university students and the children of SGS Members. Due to the success of our annual golf tournament/scholarship fundraiser, this year we were able to fund four scholarships.

Congratulations to the Bill Blair Scholarship Award 2015 Recipients:

Congratulations to the University Earth Science Award 2015 Recipients:

In addition to and independent of the SGS Scholarship, our parent society SEG also runs a Scholarship Program. If you have any questions in regard to the SEG Scholarship please e-mail


The Southeastern Geophysical Society proudly announce that the 2016 ANNUAL SCHOLARSHIP FUNDRAISING GOLF TOURNAMENT & CRAWFISH BOIL will be held on March 24th (Thursday) at Tchefuncta Country Club, 2 Country Club Park, Covington, LA with an 8:30 AM Shotgun Start.

Each year, SGS awards scholarships to high school seniors and college students majoring in the earth sciences, and our spring golf tournament is the primary source of scholarship funding. These scholarships are an important contribution to the promotion of scholastic excellence, and your participation in the golf tournament will support this worthy cause. This year, we are providing donation options for both organizations and individual members.

If you are unable to participate in the SGS Fundraising Golf Tournament, but would like to donate personally to the Scholarship Fund, you can do so by check, cash or online payment via credit card. To donate funds to the SGS Scholarship Fund online, click the donate button below:


Registration and Sponsorship Options are in the table below:

Register Sponsor
2016 SGS golf tournament and membership
Foursome names if known
2016 SGS Golf Tournament Sponsorship Options and Rates
Company Name

Not ready to sign up on line: download the 2016 SGS Golf Tournament and Scholarship Fundraiser announcement flyer with entry form here.

Companies are also encouraged to provide "Ditty Bag Fillers" such as golf balls, golf towels, t-shirts with logos, tees, ball markers, convention exhibit booth give away items with logos, snacks, and "in kind" donations such as gift certificates.

Check out the photographs in October 2016's Reflections for information on the Fall 2016 SGS social.

A big thank you as always to all our sponsors.


Our membership runs from June 1st one year to May 31st the next. The current membership form can be downloaded here: 2016-17 SGS Membership Application Form. If you played in the Golf Tournament this year you become a member through May 2016. If you didn't then you will need to send in or bring your $25 with next year's application form filled out to one of our events.

SGS membership renewal requests will soon be emailed by the 2016-2017 SGS Secretary to individuals with expired memberships in August. If you do not receive one, then your membership is probably up-to-date.

2016 - 2017 SGS Membership options


Download and checkout the new October 2016 Reflections newsletter here. Archive editions of Reflections can be found here.

Contact our editor, Arslan Tashmukhambetov, with submissions for the newsletter and/or to place an advertisement.

  • Support the geophysical community and geophysics in South East Louisiana
  • Exposure to major oil companies and independents working onshore as well at the Gulf of Mexico
  • Advertisements are published monthly (September-June) in the society newsletter
  • Advertisements to be published in the membership directory
  • Logos for full page advertisers are displayed on the SGS website along with a link to the advertisers' own websites
SGS Reflections Ads Sizes and Rates
Company Name


  • A calendar of our activities or events to be aware of.

OCS Bulletin Board

  • Since 1995 the first Internet Website providing critical information on the Gulf of Mexico - OCS BBS.

SGS 2016-2017 Goals & Objectives:

  • To be the most successful local Geophysical society in America
  • To provide a service to the membership, local companies, and the region
  • Focus on Education, Technology, Social and Community
  • General Meetings Monthly
  • Executive Committee Meetings Quarterly face-to-face
  • Be a force for good in the local community
  • Provide multiple opportunities for the professional and social development of the membership

  • Finances:
  • Not-for-profit
  • Aim to reduce volatility on savings

Local Jobs

Local job announcements can be posted in the Reflections newsletter. Contact 2015-2016 SGS Editor, Arslan Tashmukhambetov [Arslan Tashmukhambetov] to post in the Reflections newsletter, starting with the next edition coming up in September.