< span class="text-format-content ">STARR Ordovician Ellenburger Core Worksh op
\;
Geologic Concepts to Understand Reservoir Quality
and Heterogeneity
Relevant for O&\;G Exploration and Production, CO2 Injection, and Waste Water Disposal
Where: Bureau of Economic Geology Core Research Center - Austin, TX (10611 Exploration Way)
When: \; Monday November 18th, 2024 - 8:30 am to 4:30 p
m
The Ellenburger Group is a target for hydrocarbon explor ation and production, CO2 injection, and waste water disposal. For each of these undertakings to be economically successful, reservoir quality and h eterogeneity are important risk factors. Within the Ellenburger, these two factors are complex as diagenetic processes of dolomitization and karstif ication have strongly affected the original limestone.
The Elle nburger strata in Texas was deposited on a very broad, shallow-water platf orm where depositional systems ranged from tidal-flat setting in the inter ior platform, through low-energy restricted intertidal to subtidal in the middle platform, to high-energy restricted subtidal on the outer platform. Following deposition and some burial, an intensive period of karstificati on occurred at the Middle Ordovician Sauk-Tippecanoe megasequence boundary , which strongly affected the upper 300-600 ft of the Ellenburger section. Dolomitization both preceded and occurred after this karst event. Karstin g has produced most of the upper Ellenburger reservoirs by creating a pore network of cave collapse associated breccias and fractures. These pore ne tworks evolve with depth and form highly heterogenous reservoirs at the in terwell scale. Dolomitization has created some dolomitized matrix intercry stalline pores, but in general, matrix porosity is less than 5%, except wh ere microbial thrombolite complexes developed. Also, in some areas, deep h ydrothermal processes have created vuggy pores.
This STARR one- day workshop for Texas operators will include:
The Morning sess ion will cover:
The afternoo n session will take place in our state of the art core viewing facility wh ere we will look at a collection of core showcasing the different facies a ssociated with the Ellenburger. This discussion will be led by Dr. Bob Lou cks from STARR/RCRL. \;
Relevant for O&\;G Exploration and Production, CO2 Injection, and Waste Water Disposal
Where: Bureau of Economic Geology Core Research Center - Austin, TX (10611 Exploration Way)
The Ellenburger Group is a target for hydrocarbon explor ation and production, CO2 injection, and waste water disposal. For each of these undertakings to be economically successful, reservoir quality and h eterogeneity are important risk factors. Within the Ellenburger, these two factors are complex as diagenetic processes of dolomitization and karstif ication have strongly affected the original limestone.
The Elle nburger strata in Texas was deposited on a very broad, shallow-water platf orm where depositional systems ranged from tidal-flat setting in the inter ior platform, through low-energy restricted intertidal to subtidal in the middle platform, to high-energy restricted subtidal on the outer platform. Following deposition and some burial, an intensive period of karstificati on occurred at the Middle Ordovician Sauk-Tippecanoe megasequence boundary , which strongly affected the upper 300-600 ft of the Ellenburger section. Dolomitization both preceded and occurred after this karst event. Karstin g has produced most of the upper Ellenburger reservoirs by creating a pore network of cave collapse associated breccias and fractures. These pore ne tworks evolve with depth and form highly heterogenous reservoirs at the in terwell scale. Dolomitization has created some dolomitized matrix intercry stalline pores, but in general, matrix porosity is less than 5%, except wh ere microbial thrombolite complexes developed. Also, in some areas, deep h ydrothermal processes have created vuggy pores.
This STARR one- day workshop for Texas operators will include:
The Morning sess ion will cover:
- A seminar of lectures and core prese ntations that reviews Ellenburger depositional setting, lithofacies, diage nesis, and reservoir quality and heterogeneity.
- A review of seism ic characterization analysis that shows the three-dimensional architecture of karst systems within the Ellenburger. Seismic data displays large scal e sags (suprastratal deformation) where cave systems have collapsed.
- Data on several injection projects in the Ellenburger section will be examined.
The afternoo n session will take place in our state of the art core viewing facility wh ere we will look at a collection of core showcasing the different facies a ssociated with the Ellenburger. This discussion will be led by Dr. Bob Lou cks from STARR/RCRL. \;
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Click HERE for Registration
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Questions: Dr. Lorena Moscardelli - \;lorena.moscardelli@beg.utexas.edu
Questions: Dr. Lorena Moscardelli - \;lorena.moscardelli@beg.utexas.edu