2011-3-21-Lecture-traps&drilling

2011-3-21-Lecture-traps&drilling - 92 th S Rift...

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Artist? a. The Kinks b. The Animals he Zombies c. The Zombies d. The Who e. The Troggs 87
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Unconformities •r e present non-deposition or erosion • often indicate tectonic events or global sea level ange laterally very continuous change, laterally very continuous • types – disconformity (parallel sed layers above and below, missing some time) onconformity (sed rocks on top of – nonconformity (sed rocks on top of igneous/metamorphic basement) gular unconformity (rocks above and below have angular unconformity (rocks above and below have different orientation)
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Angular Unconformity
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Disconformity
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Nonconformity Cambrian Flathead ss on top of recambrian granite Precambrian granite
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Potential Trap in Strike-slip Environment – Flower Structure Map
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Unformatted text preview: 92 th S Rift North Sea Rifts 93 Western US Thrusted Structures 94 Barnett Shale at ~7,500 ft depth, uake source at Quake source at ~16,400 ft Drilling The Process A hole is drilled into the earth y rotating a bit to grind and by rotating a bit to grind and chip the rock. The bit is rotated by spinning the drill string or by use of a own hole motor or both. down hole motor or both. The rock pieces, called cuttings, are removed from the well by circulating drilling fluid. rinciple Drilling Rig Functions Principle Drilling Rig Functions A drilling rig has four key functions. (1) Hoisting operations. (2) Circulation of drilling fluid. (3) Pipe (Bit) rotation. (4) Pressure control....
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This note was uploaded on 04/18/2011 for the course PGE 301 taught by Professor Olson during the Spring '11 term at University of Texas at Austin.

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2011-3-21-Lecture-traps&drilling - 92 th S Rift...

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