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Mineral Temperatures of the Sedimentary Basins for Petroleum Resources Exploration, Korea
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 Title & Authors
Mineral Temperatures of the Sedimentary Basins for Petroleum Resources Exploration, Korea
Son, Byeong-Kook;
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The potential of petroleum generation was investigated by clay mineralogical changes of illite-smectite on the sedimentary basins: Tertiary Pohang basin and Cretaceouls Gyeongsang basin on land, and offshore basins east and west of Korea. Only disordered illite-smectite mixed layer minerals occur in the Pohang sediment, where petroleum generation cannot be expected due to low temperatures below . By contrast, the Gyeongsang basin is characterized by the occurrence of illite and high temperatures above which are obtained by illite crystallinity. The high temperatures indicate that the Gyeongsang sediment ha, already passed through the oil generation stage. The change of disordered illite-smectite to R-l ordered illite-smectite is shown in the sediment of the East Sea continental shelf area at a depth of 2,500 m. Therefore, the oil generation can be expected in the sediments below the depth of 2,500 m. The sequential change of disordered illite-smectie to R=3 ordered illite-smectite through R=l ordered illite-smectite occurs in the sediments of West Sea continental shelf area with burial depth which shows the favorable condition for oil and gas generation. The temperatures of sediments measured by illite-smectite indicate that hydrocarbon potential is very low in the onland basins but high in the continental shelf areas.
Pohang basin;Gyeongsang basin;illite-smectite;clay mineral;petroleum generation;
 Cited by
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