linda sumrall - neprisstore.blob.core.windows.net
TRANSCRIPT
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Linda Sumrall
• Louisiana State University 1976
• Bachelors of Science in Geology
• Worked for 39 years as a Geophysicist• Gulf Oil
• Union Texas Petroleum
• Energy Development Corporation
• Louisiana Land and Exploration
• Burlington Resources
• Noble Energy
• Explored for oil and gas
• Developed oil and gas fields
With my Twin Daughters
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Show and Tell
• Drill Bit
• Core
Data used to Study Earth Layers
• Seismic
• Well Log
• Surface Geology
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Seismic Reflection Data Source
• Loud sound made by
• Air gun
• Dynamite
• Vibrating Truck (Vibroseis)
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Seismic Reflection Data
• Sound Bounces off the Layers in the Earth Like an Echo
• Recorded by a Receiver
Layer in the Earth
Source Receiver
Voice EarsWall
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Seismic Datasource
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Seismic Line Example
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Well Logs
• When a well is drilled, a long skinny tool is lowered down the hole. This tool takes measurements along the wellbore. We call the measurements – Well Logs.
• From the well logs we get thedepth of interesting rocks and the ages of these rocks.
Top of Oil Sand
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Surface GeologyRoad Cut in Maryland
fold
Sideling Hill Road Cut
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Surface Geology• Faults
• Location??
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Surface Geology
Cliff Face in Ireland
Sandstone
Eroded away when the sandstone was deposited
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Bored Cows in Ireland
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Ross Sandstone
Sandmud
Erosional surface
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Kilbaha Bay, IrelandRoss Sandstone
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Put all the Data Together into a Map!!!
1 mile
-1000
-1200
-1200
-1400
-1400
-1400
-1000
-1200
-1400
Ground
A
B
fault
A B
These lines with numbers are call contour lines. These lines show everywhere the top of the oil sand is at a certain depth below the ground.
Top of Oil Sand Map
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Drilling Discovery
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Drilling Discovery
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Drilling a Dry Hole
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Drilling a Dry Hole
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Earth ChangesPlate Tectonics
The Theory we use to explain the movement of continents
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3 feet a year
As fast as your fingernails grow or 1 inch per year
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Africa and South America
NOW About 200 million years ago
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The End
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Surface Geology
• Tight Folds
• Limestone