Oil and Gas Test 2

Oil and Gas Test 2

Question Answer
What are the three stages of mountain building that produced the Appalachians? Ordovician, Devonian, Permian
Why and when was the Catskill Delta formed? formed in the Devonian period by numerous streams and the shoreline which was in present-day New York/Pennsylvania
How does the Marcellus shale relate to other Devonian shales? they are all part of the Arcadian collision
Explain why the Marcellus shale is the deepest sediments from the Acadian moutains fell into the valley (future PA), water covered the valley and the Marcellus formed; more sediment falls, water covers, Rhinestreet forms; sediment, water, Ohio
What is the approximate depth and thickness of the Marcellus shale in this area? 6,000-7,000 feet deep; 100 feet thick
What is the relationship between the Barnett Shale and the Marcellus Shale? part of the same basin; Barnett formed years after the Marcellus
What are the major systems involved in a modern rotary drilling rig? hoisting (derrick); rotating (table, string, bit, kelly); mud (pumps, shaker table, filter)
What are the responsibilities of the Tool Pusher on a drill rig? In charge of all operations; the boss
What are the responsibilities of the Driller on a drill rig? controls drilling processes
What are the responsibilities of the Roughneck on a drill rig? drill floor people
What are the responsibilities of the Company Man on a drill rig? represents the oil company
What are the responsibilities of the Mud Logger on a drill rig? collects drill cuttings, records mud gasses and prepares sample/mud log
What's the difference between a jack-up rig and a semi-submersible rig? A jack-up rig is movable. A semi-submersible rig is stationary. Both are located in the oceans.
What is a whipstock and what is its purpose during drilling? A wedge-shaped piece, that will alter the path of the drill bit.
What are the main stages of a vertical drilling operation? 1) site prep, 2) "spudding in" 3) drill to water table and case it. 4) drill to target/reservoir
What are the main stages of a horizontal drilling operation? 1) site prep, 2) "spudding in" 3) drill to water table and case it. 4) drill to target/reservoir 5) Horizontal drilling. 6) case horizontal sections 7) perforate pipe 8) hydrofrac the shale
What is the difference between oil-wet reservoirs and water-wet reservoirs? Which is better? Oil wet has more oil, water wet has more oil; water-wet is better
How can you calculate the total volume of hydrocarbons in a conventional reservoir? thickness x area x porosity – (1 – water saturation)

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