NASC 130 Essentials3_ch12

in 1859 eased petroleum recovery initiated an oil

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Unformatted text preview: ntials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Oil Exploration The Modern Search for Oil: The Early exploration involved searching for rare oil seeps Investors realized systematic exploration was needed Petroleum exploration became a sub-discipline of geology Petroleum Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Oil Exploration Complex, dangerous, and exciting (many steps) Geologists map sedimentary rocks Guide searches for source rocks, reservoirs, and traps Rock sequences compiled from outcrops and drill cores Cross-sections show rock geometry, aid search Cross-sections Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Oil Exploration Seismic reflection profiles subsurface layers Sound is “bounced” off of subsurface layers Permits geologists to look for traps without drilling Seismic imaging is conducted on land and at sea Seismic Seismic studies are sophisticated and expensive Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Oil Exploration Expensive drilling required to tap a potential trap Expensive A diamond rotary bit pulverizes rock High-density drilling – mud cools the bit and lifts cuttings High-density The heavy mud reduces blowouts Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12:...
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This document was uploaded on 11/25/2013.

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