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二连盆地高力罕凹陷勘探程度较低,烃源岩研究相对薄弱。本文通过对烃源岩的岩性及分布、有机质丰度、有机质类型以及有机质热演化程度等方面的分析,对高力罕凹陷下白垩统巴彦花群阿尔善组的烃源岩特征进行了深入研究。结果表明,烃源岩主要分布于高力罕凹陷查干诺尔洼槽内,其中洼槽东北部G2井区阿尔善组暗色泥岩发育、有机质丰度较高、有机质类型好、热演化程度均已进入成熟阶段,是研究区内烃源岩发育的主力区域;而西南部G2井区暗色泥岩的有机质丰度较低、有机质类型较差、有机质热演化程度低,烃源岩发育相对较弱。
The exploration of Gaolijian sag in Erlian basin is relatively low, and the study of source rocks is relatively weak. Based on the analysis of lithology and distribution of source rocks, abundance of organic matter, types of organic matter and extent of thermal evolution of organic matter, the characteristics of source rocks of Lower Reaches of Cretaceous Aiyashan Formation in Lower Cretaceous In-depth study. The results show that the source rocks are mainly distributed in the Chaganuoer depression of the Gaolihan Sag. The dark mudstone of the Aershan Formation in the northeast G2 depression of the depression is characterized by high organic matter abundance, good organic matter type and thermal evolution degree The maturity stage is the main area for the development of source rocks in the study area. The dark mudstone in the G2 well in the southwestern part is characterized by low organic matter abundance, poor organic matter types, low thermal evolution of organic matter and relatively weak source rock development.