Spring Quickens Pace for Activities

Viva San Antonio!

It’s not too late to complete your plans to attend the AAPG Annual Convention and Exhibition in San Antonio, April 20-23. In early March pre-registration was running well ahead of that for the previous two annual meetings comparing the same point in time.

An outstanding technical program is in store for us.

A feature added this year is a Climate Change Forum organized by the AAPG Global Climate Change Committee. Priscilla Grew is chair of the 12-member committee and Jeff Levine and John Armentrout will co-chair the forum.

The forum, to be held 8-11:40 a.m. on Wednesday, April 20, will feature five prominent speakers who will discuss basic data that has affected climate change in the past and may be factors in the future. Time for questions is scheduled after each speaker and at the end of the program. [RELATED STORY]

AAPG will video record the session and make the information available to interested groups.

San Antonio, my hometown, is always fun. Hope to see you there!

Concept Release

AAPG has responded to the Security and Exchange Commission’s “Concept Release on Possible Revisions to the Disclosure Requirements Relative to Oil and Gas Reserves."

The SEC posed a number of questions regarding disclosure requirements and asked for public comment. AAPG responded timely with a document prepared by an ad hoc committee chaired by Pete Rose and including six other AAPG members who also are expert in the specialty of reserve estimation.

More Service for Members

AAPG soon will have a new résumé and job posting service available for members on our Web site – the Executive Committee, acting on a recommendation from the Membership Career Services Committee, authorized staff to contract with Boxwood Career Services to proceed with the improved job board.

Members seeking employment or consulting work may post their résumés without cost. Employers, including those seeking consulting services, will pay a modest fee to post on the site.

Watch for an announcement when this service is operational.

Congressional Visits Day

Ten AAPG members attended the 12th annual Congressional Visits Day in Washington, D.C., March 5-6.

The first day included morning briefings for earth and space scientists at the American Geophysical Union and afternoon sessions at the American Association for the Advancement of Science. David Curtiss, director of our Washington office (GEO-DC), arranged visits to Congressmen and their staffs on the second day.

Legislative issues discussed were:

  • Future Work Force Needs of the Oil and Gas Industry.
  • Preservation of Geological and Geophysical Data.
  • Research and Development Needs of the Domestic Petroleum Industry in the 21st Century.

The trip was fun as well as informative and we shared our views on the “Hill.”

Southwest Section Celebrates 50 Years

AAPG’s Southwest Section celebrated its Golden Anniversary at its annual Section meeting Feb. 24-27 in Abilene, Texas.

The “section” began as the Southwestern Federation of Geological Societies in 1958. The Federation evolved into the Southwest Section of AAPG in late 1967 or early 1968.

Bob Gunn was the first AAPG president to hail from the Southwest Section (1978-79) followed by six others, including the current president.

Section members also have been recipients of more than 50 AAPG awards, with Bob Gunn as the sole Sidney Powers Memorial medalist.

I congratulate General Chair Darrell Mauldin and his entire committee for a memorable convention.

Hasta la Vista!

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See Also: Book

Alternative Resources, Structure, Geochemistry and Basin Modeling, Sedimentology and Stratigraphy, Geophysics, Business and Economics, Engineering, Petrophysics and Well Logs, Environmental, Geomechanics and Fracture Analysis, Compressional Systems, Salt Tectonics, Tectonics (General), Extensional Systems, Fold and Thrust Belts, Structural Analysis (Other), Basin Modeling, Source Rock, Migration, Petroleum Systems, Thermal History, Oil Seeps, Oil and Gas Analysis, Maturation, Sequence Stratigraphy, Clastics, Carbonates, Evaporites, Seismic, Gravity, Magnetic, Direct Hydrocarbon Indicators, Resource Estimates, Reserve Estimation, Risk Analysis, Economics, Reservoir Characterization, Development and Operations, Production, Structural Traps, Oil Sands, Oil Shale, Shale Gas, Coalbed Methane, Deep Basin Gas, Diagenetic Traps, Fractured Carbonate Reservoirs, Stratigraphic Traps, Subsalt Traps, Tight Gas Sands, Gas Hydrates, Coal, Uranium (Nuclear), Geothermal, Renewable Energy, Eolian Sandstones, Sheet Sand Deposits, Estuarine Deposits, Fluvial Deltaic Systems, Deep Sea / Deepwater, Lacustrine Deposits, Marine, Regressive Deposits, Transgressive Deposits, Shelf Sand Deposits, Slope, High Stand Deposits, Incised Valley Deposits, Low Stand Deposits, Conventional Sandstones, Deepwater Turbidites, Dolostones, Carbonate Reefs, (Carbonate) Shelf Sand Deposits, Carbonate Platforms, Sebkha, Lacustrine Deposits, Salt, Conventional Drilling, Directional Drilling, Infill Drilling, Coring, Hydraulic Fracturing, Primary Recovery, Secondary Recovery, Water Flooding, Gas Injection, Tertiary Recovery, Chemical Flooding Processes, Thermal Recovery Processes, Miscible Recovery, Microbial Recovery, Drive Mechanisms, Depletion Drive, Water Drive, Ground Water, Hydrology, Reclamation, Remediation, Remote Sensing, Water Resources, Monitoring, Pollution, Natural Resources, Wind Energy, Solar Energy, Hydroelectric Energy, Bioenergy, Hydrogen Energy
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See Also: Bulletin Article

Analog outcrops are commonly used to develop predictive reservoir models and provide quantitative parameters that describe the architecture and facies distribution of sedimentary deposits at a subseismic scale, all of which aids exploration and production strategies. The focus of this study is to create a detailed geological model that contains realistic reservoir parameters and to apply nonlinear acoustic full-waveform prestack seismic inversion to this model to investigate whether this information can be recovered and to examine which geological features can be resolved by this process.

Outcrop data from the fluviodeltaic sequence of the Book Cliffs (Utah) are used for the geological and petrophysical two-dimensional model. Eight depositional environments are populated with average petrophysical reservoir properties adopted from a North Sea field. These units are termed lithotypes here. Synthetic acoustic prestack seismic data are then generated with the help of an algorithm that includes all internal multiples and transmission effects. A nonlinear acoustic full-waveform inversion is then applied to the synthetic data, and two media parameters, compressibility (inversely related to the square of the compressional wave velocity vP) and bulk density, ρ, are recovered at a resolution higher than the shortest wavelength in the data. This is possible because the inversion exploits the nonlinear nature of the relationship between the recorded data and the medium contrast properties. In conventional linear inversion, these details remain masked by the noise caused by the nonlinear effects in the data. Random noise added to the data is rejected by the nonlinear inversion, contributing to improved spatial resolution. The results show that the eight lithotypes can be successfully recovered at a subseismic scale and with a low degree of processing artifacts. This technique can provide a useful basis for more accurate reservoir modeling and field development planning, allowing targeting of smaller reservoir units such as distributary channels and lower shoreface sands.

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See Also: CD DVD

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See Also: DL Abstract

Offshore Angola has to date delivered recoverable reserves in excess of 20 billion barrels of oil equivalent. This has been encountered in two distinct play systems: the Upper Cretaceous Pinda carbonates sourced by Lower Creatceous lacustrine mudstones and Tertiary deepwater slope turbidite sands sourced by underlying Upper Cretaceous marine mudstones. An extension of the Girassol play into Block 18 to the south will be used to describe how high quality 3D seismic data coupled with a detailed analysis of rock properties led to an unprecedented 6 successes out of 6 wells in the block, including the giant Plutonio discovery. Industry is turning once more to the carbonate play potential - this time in deepwater. It would seem that the Angola offshore success story is set to continue for some time to come.

Desktop /Portals/0/images/_site/AAPG-newlogo-vertical-morepadding.jpg?width=50&h=50&mode=crop&anchor=middlecenter&quality=90amp;encoder=freeimage&progressive=true 839 DL Abstract

See Also: Field Seminar

This four-day field trip will begin with a drive from Denver to Glenwood Springs and a road log describing the general geology along Interstate 70 (I-70), as well as an overview stop in Rifle to introduce the Wasatch and Green River systems. It will focus on two themes: observing the characteristics of a wide variety of sedimentary environments and comparing these with subsurface data.

Desktop /Portals/0/PackFlashItemImages/WebReady/ace2015-ft-08-hero.jpg?width=50&h=50&mode=crop&anchor=middlecenter&quality=90amp;encoder=freeimage&progressive=true 14687 Field Seminar