Changes

  | part    = Predicting the occurrence of oil and gas traps

  | part    = Predicting the occurrence of oil and gas traps

  | chapter = Exploring for stratigraphic traps

  | chapter = Exploring for stratigraphic traps

  | frompg  = 21-1

  | frompg  = 21-62

  | topg    = 21-68

  | topg    = 21-63

  | author  = John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks

  | author  = John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch21/ch21.htm

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch21/ch21.htm

Weyburn field, Alberta, is an example of a giant diagenetic trap (1 billion BOE). Primary trap geometries appear to be along the [[Dip|updip]] termination of the Midale [[dolomite]] above the potential bottom seal of the Frobisher [[anhydrite]] and beneath the top seal of the Mesozoic section. If only these trapping geometries were used to locate the trap, [[Sequence stratigraphy|sequence stratigraphic]] mapping initially would not have located the trap. However, [[Wikipedia:Microporous material|microporous]] dolomites are present near the Mesozoic [[Definitions_of_depositional_system_elements#Sequence_boundaries|sequence boundary]] in the updip portion of the Midale dolomite. These [[Wikipedia:Mesoporous material|mesoporous]] dolomites downdip form the reservoir facies.

Weyburn field, Alberta, is an example of a giant diagenetic trap (1 billion BOE). Primary trap geometries appear to be along the [[Dip|updip]] termination of the Midale [[dolomite]] above the potential bottom seal of the Frobisher [[anhydrite]] and beneath the top seal of the Mesozoic section. If only these trapping geometries were used to locate the trap, [[Sequence stratigraphy|sequence stratigraphic]] mapping initially would not have located the trap. However, [[Wikipedia:Microporous material|microporous]] dolomites are present near the Mesozoic [[Definitions_of_depositional_system_elements#Sequence_boundaries|sequence boundary]] in the updip portion of the Midale dolomite. These [[Wikipedia:Mesoporous material|mesoporous]] dolomites downdip form the reservoir facies.

The microporous strata form the lateral seal. The sinuous updip edge is a large waste zone that contains live oil shows in microporous strata, indicating the [[accumulation]] is downdip.

The microporous strata form the [[lateral]] seal. The sinuous updip edge is a large waste zone that contains live oil shows in microporous strata, indicating the [[accumulation]] is downdip.

[[:file:exploring-for-stratigraphic-traps_fig21-41.png|Figure 1]] contains a [[cross section]], map, and summary of the field.

[[:file:exploring-for-stratigraphic-traps_fig21-41.png|Figure 1]] contains a [[cross section]], map, and summary of the field.

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Exploring for stratigraphic traps]]

[[Category:Exploring for stratigraphic traps]]