2008 RMAG Rockbuster's Ball and Annual Professional Awards Banquet
November 22, 2008
Synopsis: The Rocky Mountain Association of Geologists cordially invites to attend our Annual Professional Awards Presentation and Dinner Dance to be held at the Columbine Country Club on Saturday, November 22, 2008.
Click on the title for links to more information and Online Registration
Luncheon cost is $30.00. Cash or Checks payable to RMAG only are taken at the door, or you may pay ahead of time with a credit card by calling the office (MC or Visa only) or clicking on the Online Registration Title above. (All Credit Cards Accepted Online)
No reservations are required for the talk only. Walk-ins cost is $5.00.
Meetings are held at the Marriott City Center on California St, between 17th & 18th Streets. Please check the Events listing in the lobby for the room.
People gather at 11:30AM. Lunch is served at 12:00 noon and the speaker presentation begins about 12:20PM.
Reservations are taken on a recording line (303-623-5396) until 10:30 AM on Wednesday before the lunch.
Note: Cancellations are taken by calling (303) 573-8621, but are not guaranteed after 10:30AM on the Wednesday before the luncheon. If you make a reservation and you do not attend the luncheon you will be billed for the luncheon. You may send someone in your place. If you do not claim your reservation by 12:00 we will attempt to sell your reservation.
NOTE: Speakers and topics are subject to change.
Speaker: David R. Pyles
Topic: Integrating outcrop and subsurface data to define regional and reservoir-scale patterns in prograding systems, Lewis Shale and Fox Hills Sandstone, Wyoming
Synopsis: This is luncheon is the RMAG Annual Luncheon!
The Cretaceous Lewis Shale and Fox Hills Sandstone of the Great Divide and Washakie basins, Wyoming is a significant gas resource in the Rocky Mountains. These Formations contain clinoforms greater than 400 meters in relief that record the progradation of a linked shelf-slope-basin system. Outcrops of this system are used to quantitatively describe reservoir architecture in five physiographically distinct areas: (1) shelf edge, (2) slope, (3) proximal base-of-slope, (4) medial base-of-slope, and (5) basin.
Shelf-edge strata are >80% sandstone and are composed of channels, river-mouth bars, mudstone sheets, and large sandstone slumps. Slumps appear to be related to seafloor instability at the shelf edge. These deposits are interpreted to record a mechanism for generating sediment gravity flows that transmitted sandstone to the slope and base of slope positions. Slope strata are only ~30% sandstone and are composed of mudstone and thin-bedded sandstone that is locally truncated by submarine channels that display architectural and facies asymmetry. This asymmetry is interpreted to reflect channel sinuosity. A large proportion of the mudstone in slope strata is interpreted to be levee strata. Proximal base-of-slope strata are ~50% sandstone and are composed of sandy submarine-fan strata consisting of slumps, amalgamated submarine channels, and turbidite lobes. Medial base-of-slope strata are >90% sandstone and are composed entirely of turbidite lobes. This area is the sandiest part of the depositional system. Basin floor strata are 20% sandstone and are composed of distal turbidite lobes.
A quantitative comparison of the data reveals that ~75% of the sandstone in the entire depositional system are partitioned between two physiographically distinct areas: shelf edge and medial base of slope. These data further reveal that the diversity of reservoir elements and facies decreases from the shelf edge to the basin floor.
The patterns and data described can be directly applied to reservoir models for Lewis Shale reservoirs in the Greater Green River Basin. These data and concepts can also be applied to other prograding shelf-slope-basin reservoirs such as those in Barrow Island, West Siberia Basin, North Slope of Alaska, and Porcupine.
On-the-Rocks field trips are planned for the summer. The details of each trip and registration information will be printed in the Outcrop issue before the trip. For information or to register for a trip e-mail, your name and phone number to Dan Plazak at plazak@
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Dec 5 RMAG Luncheon Speaker: David R. Pyles Topic: Integrating outcrop and subsurface data to define regional and reservoir-scale patterns in prograding systems, Lewis Shale and Fox Hills Sandstone, Wyoming
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