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1. Seismic contribution to components of hydrocarbon accumulation

1. Seismic contribution to components of hydrocarbon accumulation

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Seismic contribution to mapping components of hydrocarbon accululation Kurt J. Marfurt CPSGG The University of Oklahoma 1-1 Intro to Petroleum Geology and Geophysics
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Learner Objectives After this section, you will be able to: Identify the seven components required for hydrocarbon accumulation Evaluate the value of seismic data in quantifying each of these components 1-2
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Two major objectives in mapping hydrocarbons 1. Exploration: Location of previously untapped hydrocarbons 2. Development (Production, Exploitation): efficient delineation, completion, and extraction of those hydrocarbons 1-3
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Seven components of hydrocarbon accumulation 1. Source rock 2. Migration pathway 3. Reservoir 4. Trap 5. Seal 6. Timing 7. Product 1-4
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1. Source Rock What is it? An organic rich rock, usually shale but sometimes limestone, which contains enough of that material to generate economic hydrocarbons and has been subjected to the proper temperature and pressure conditions to expulse those hydrocarbons. How does seismic help? Conventional – Seismically-determined depths are input to basin maturation studies: is a known source rock deep enough to generate hydrocarbons? Unconventional – seismic inversion attempts to differentiate between organic rich and more quartz/carbonate-rich ‘fracable’ ‘rock types’. 1-5 (courtesy Chuck Blumentritt)
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Hydrocarbon generation window. 1-6 (www.earthsci.org;Lines and Newrich, 2004)
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Mapping shale- vs. sand-prone lithologies: Woodford Shale, OK Hunton top/ base of Woodford N Lower Woodford Middle Woodford Upper part of middle Woodford Upper Woodford TOC - 7.7% Qtz. TOC – 2.4 % Qtz. (Gupta et al., 2011; Seismic data courtesy of CGG-Veritas)
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2. Migration Pathway What is it?
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