18 sessions set for Denver

EMD Program Looks to Future

AAPG’S Energy Minerals Division (EMD) will respond to heightened awareness of global energy issues by offering an extensive and diverse selection of sessions, short courses, field trips and forums at the upcoming 2009 AAPG Annual Convention and Exhibition, set for June 7-10 in Denver.

The core of this year’s technical program, “Image the Present, Imagine the Future” coincides with EMD’s focus on current and future energy mineral sources and technologies including coal, coalbed methane, COsequestration, gas hydrates, gas shales, energy economics, geospatial technology, geothermal resources, oil (tar) sands, oil shales, uranium minerals and astrogeology topics.

Eighteen oral and poster sessions, included under eight separate themes, are highlighted below with short course, field trip and forum opportunities.

EMD Oral and Poster Sessions

Theme II: Hydrocarbon Systems and Basin Analysis

  • Exploration Application of High Resolution Magnetic, Gravity and Remote Sensing Data in Frontier and Mature Basins.
  • Petroleum Systems – Source Rocks.

Theme V: Structural Geology

  • Tectonics and Diagenesis in Shale Basins.

Theme VIII: Tight Gas

  • Pore Network and Fluid Flow in Mudrocks.
  • Petrophysics of Shales and Tight Gas Sands: Converting Resources to Reserves.

Theme IX: Unconventional Reservoirs

  • Gas Shales Reservoirs – Updates and New Insights.
  • Coalbed Hydrocarbons.
  • Hydrates – Sedimentology and Resources.
  • Oil Shales – Reservoir Characterization and Testing.
  • Oil/Tar Sands – New Techniques and Resource Assessments.
  • Core Poster Session: Fractured Shale Reservoirs.

Theme X: Astrogeology

  • Energy Minerals in the Solar System: Resources for the 21st Century.
  • The Impacts of Impacts.
  • Lunar Field Exploration Equipment and Sample Documentation.

Theme XI: Alternative and Renewable Energy

  • Uranium Minerals and Exploration.
  • Geothermal Energy Systems – Their Structure, Stratigraphy and Rock Mechanics.

Theme XIII: Responsible Development, Sustainability, Climate Science

  • Carbon Dioxide Capture and Geologic Sequestration.

Theme XV: New Technologies

  • GIS/Geospatial Map Gallery.
EMD Short Courses

Keeping You at the Top of Your Game

  • Shale Gas I and II: Geochemical and engineering predictions of shale reservoirs; key parameters and data relationships that define productive gas shale’s.
  • Uranium Geology and Logging Techniques for Uranium Exploration.
  • Integrated Structural/Tectonic Studies of HRAM Data for Resource Play Analyses.
  • National Petroleum Reserve Core Workshop – Lower Cretaceous clinoforms with basin floor source rocks through thick, gaseous coalbeds with reservoirs in-between.
EMD Field Trips
  • Gas Shales, Oil Shales, Coalbed Methane and Tight Gas Reservoirs in the Piceance Basin.
  • Coal Bed Methane, Raton Basin, Colorado and New Mexico.
  • Remote Sensing, Climate Change and Planetary Science Facilities.
Forum (EMD, DPA, DEG)
  • Carbon Dioxide Sequestration and Future Energy Sources (Wind, Solar and Nuclear).
EMD Luncheon

Jeffrey S. Kargel, adjunct professor and senior research scientist in the Department of Hydrology and Water Resources at the University of Arizona, will be the speaker for this year’s EMD Luncheon, set for Wednesday, June 10.

Kargel will astonish us and feed our imaginations with a talk titled “Unconventional Far-Out Petroleum and Gas: Hydrocarbons from Mars to Titan and Beyond.”

Kargel will pose the question of whether we are too terracentric in thinking that Earth is the only abode of biogenic petroleum and gas. Today, methane rain pours over Titan’s surface, erodes river valleys and fills lake basins while carbonaceous aerosols drift down from the upper atmosphere. Speculatively, acetylene glaciers may scour Titan’s poles and benzene sand dunes blanket the dry equatorial basins. Volatile hydrocarbons cause comets to jet and split, and help power geysers on Saturn’s tiny moon, Enceladus.

A prolific author of two books and multiple peer-reviewed papers, chapters, articles and abstracts, Kargel believes that hydrocarbons certainly are treasure-troves of scientific information on the history of the solar system.

Please join us for what will be a stimulating and titillating presentation!

This entire EMD program was organized by numerous volunteers: EMD Executive Committee members and past members, EMD commodity chairs and counselors, and all the oral and poster session co-chairs. Thanks to all of you for your diligence and assistance in putting together a program that features the essence of the Energy Minerals Division.

We hope that you will be able to join us in Denver!

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Division Column-EMD

Laura L. Wray is the EMD Annual Meeting Vice Chair.

Division Column-EMD

The Energy Minerals Division (EMD), a division of AAPG, is dedicated to addressing the special concerns of energy resource geologists working with energy resources other than conventional oil and gas, providing a vehicle to keep abreast of the latest developments in the geosciences and associated technology. EMD works in concert with the Division of Environmental Geosciences to serve energy resource and environmental geologists.

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See Also: Book

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See Also: Bulletin Article

The geometries of clay smears produced in a series of direct shear experiments on composite blocks containing a clay-rich seal layer sandwiched between sandstone reservoir layers have been analyzed in detail. The geometries of the evolving shear zones and volume clay distributions are related back to the monitored hydraulic response, the deformation conditions, and the clay content and strength of the seal rock. The laboratory experiments were conducted under 4 to 24 MPa (580–3481 psi) fault normal effective stress, equivalent to burial depths spanning from less than approximately 0.8 to 4.2 km (0.5 to 2.6 mi) in a sedimentary basin. The sheared blocks were imaged using medical-type x-ray computed tomography (CT) imaging validated with optical photography of sawn blocks. The interpretation of CT scans was used to construct digital geomodels of clay smears and surrounding volumes from which quantitative information was obtained. The distribution patterns and thickness variations of the clay smears were found to vary considerably according to the level of stress applied during shear and to the brittleness of the seal layer. The stiffest seal layers with the lowest clay percentage formed the most segmented clay smears. Segmentation does not necessarily indicate that the fault seal was breached because wear products may maintain the seal between the individual smear segments as they form. In experiments with the seal layer formed of softer clays, a more uniform smear thickness is observed, but the average thickness of the clay smear tends to be lower than in stiffer clays. Fault drag and tapering of the seal layer are limited to a region close to the fault cutoffs. Therefore, the comparative decrease of sealing potential away from the cutoff zones differs from predictions of clay smear potential type models. Instead of showing a power-law decrease away from the cutoffs toward the midpoint of the shear zone, the clay smear thickness is either uniform, segmented, or undulating, reflecting the accumulated effects of kinematic processes other than drag. Increased normal stress improved fault sealing in the experiments mainly by increasing fault zone thickness, which led to more clay involvement in the fault zone per unit of source layer thickness. The average clay fraction of the fault zone conforms to the prediction of the shale gouge ratio (SGR) model because clay volume is essentially preserved during the deformation process. However, the hydraulic seal performance does not correlate to the clay fraction or SGR but does increase as the net clay volume in the fault zone increases. We introduce a scaled form of SGR called SSGR to account for increased clay involvement in the fault zone caused by higher stress and variable obliquity of the seal layer to the fault zone. The scaled SGR gives an improved correlation to seal performance in our samples compared to the other algorithms.
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See Also: CD DVD

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See Also: Map

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