Oil Sands Gathering Conditions and Models in Compressional Basin

摘要

Most of oil sands resources locate in compressional basin. The oil sands gathering conditions in typical basins like western Canada basin, Eastern Venezuela basin and Zhunger basin was analyzed. The rich organic source rock is the basic condition to giant oil sands reservoir. Favorable migration and driving force for hydrocarbon affected the oil sands scale and geographic location. Water washing by meteoric water and bacterial degradation make hydrocarbon heavier and heavier. The paleo-delta facies, fluvial facies sands in compressional basin provide favorable space for oil to deposit. A widespread regional shale cap restrains hydrocarbon escape and the hydrocarbon fill up the sands. At last, according to the position of oil sands in compressional basin, oil sands gathering model in light pitch monocline and oil sands gathering model in compressional basin edge.