黔东南典型古油气藏的精细解剖对黔中隆起周缘乃至南方海相油气勘探研究具有重要意义.研究表明,在早寒武世初期、晚泥盆世早期和二叠纪,本地区均发育优质烃源岩,其中以下寒武统盆地相、斜坡相的黑色页岩发育最好,有机质丰度高(TOC普遍大于2,),类型好(偏腐殖型),厚度大,是麻江古油藏及凯里残余油气藏的主力烃源岩;早二叠世盆地相和澙湖相中发育的优质烃源岩与本层位中的沥青具亲缘关系,显示自生自储的特点.二叠纪烃源岩对黔中隆起及其周缘地区油气成藏具有重要作用.本地区缺乏扬子地区广泛发育的上奥陶统五峰组-下志留统龙马溪组底部那套优质烃源岩.

The total oil carbon of Wuluqiao oil seepage in Awati Sag has a comparatively heavy isotope of -29.4‰, which fells at the area of high maturity oil in the F1-F2 plate. The oil of the seepage shows a high MPR of 2.03, which means a higher maturity than those of other high mature condensate oil and crude oil having found in Tarim Basin. The distributions of terpane and gonane are characteristic of low abundance of C29Ts and rearranged hopane, higher abundance of gammacerane，medium-high abundance of C28-gonane, and low abundance of diasteranes, which are similar with those of the oil from Cambrian source rock but obviously different from those of oil from the Carboniferous-Permian, Triassic and Middle-Upper Ordovician source rocks in this sag and its periphery. According to multidisciplinary analysis, it concludes that the oil of Wuluqiao oil seepage is original from Cambrian source rock during the late period of hydrocarbon generation.