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青藏高原羌塘地区自晚二叠世至早白垩世沉积了累计厚度约10000m 的海相地层,发育了五个具备生油气条件的层段,其中以三叠系及中侏罗统为最有利的生油气层段。中下三叠统发育面积不大,但有机质丰度高,以腐泥型为主,已达高成熟阶段。上三叠统赋含丰富的有机质,其类型仅发现腐殖型,成熟度已达凝析油湿气阶段。中侏罗统碳酸盐岩段富含有机质,以Ⅱ型为主,已进入生油阶段。上三叠统及中侏罗统生油气岩分布面积近15×10~4km~2, 累计厚度约2000m。因此,从生油岩角度来讲,羌塘地区是有找油前景的。
In the Qiangtang area of the Qinghai-Tibet Plateau, marine accumulations with a cumulative thickness of about 10000m have been deposited from Late Permian to Early Cretaceous, and five intervals with hydrocarbon generation conditions have been developed, of which Triassic and Middle Jurassic are the most favorable Of the oil and gas intervals. The middle and lower Triassic development area is not large, but high abundance of organic matter to sapropelic-based, has reached a high stage of maturity. The Triassic is rich in organic matter, its type found only humus, maturity reached condensate oil moisture stage. The Middle Jurassic carbonate rocks are rich in organic matter, mainly Type II, and have entered the stage of oil production. The Upper Triassic and Middle Jurassic hydrocarbon generation rocks distribute nearly 15 × 10 ~ 4km ~ 2 with a total thickness of about 2000m. Therefore, from the point of source rock, the Qiangtang area is looking for oil prospects.