北羌塘盆地上二叠统热觉茶卡组烃源岩评价

Evalution of source rock from Raggyorcaka formation in upper Permian in the northern Qiangtang basin

前人对青藏高原北羌塘盆地地区古生代烃源岩研究极少,通过对北羌塘盆地鲤鱼山-长梁山地区上二叠统热觉茶卡组实测剖面的研究,并对剖面上19件烃源岩样品进行地球化学特征分析。其分析结果表明,上二叠统热觉茶卡组烃源岩总体属于中等-好烃源岩,有机质类型以腐殖-腐泥型为主,有机质成熟度处于高成熟度阶段,总体达到生气阶段。总体表明上二叠统热觉茶卡组烃源岩有良好的生烃潜力,并推测部分北羌塘盆地古生界地层烃源岩有较好的生烃前景。

Abstraet：Paleozoic source rock in the northern Qiangtang basin in the Tibetan Plateau was researched rarely by predecessors. With studying on the section of Raggyorcaka formation in upper Permian in the northern Qiangtang basin, 19 samples of source rock in the section are analyzed by geochemistry. The analysis result indicates that the potential of source rock is fair-good, the Kerogen type of source rock is 112, and the level of thermal maturation is late mature. In conclusion, source rocks from good hydrocarbon-generation potential. Raggyorcaka formation in Upper Permian have a