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新疆北部塔城盆地南缘下二叠统卡拉岗组发育一套陆相沉积的暗色泥岩,在伯依布谢水库北侧厚达131.77m,通过采集11组样品进行有机碳含量、岩石热解、氯仿沥青“A”、族组成、镜质体反射率和干酪根镜检等有机地化测试分析,探讨其生烃潜力。结果表明,卡拉岗组暗色泥岩有机质丰度较高(TOC平均0.97%),有机质类型以Ⅲ型(腐植型)为主,热演化程度较高(Ro平均1.19%,T_(max)平均511.8℃),具有一定的生烃潜力;但其分布局限、厚度不稳定,且构造保存条件较差,综合分析认为其勘探潜力较为有限。
In the northern margin of Tacheng Basin, southern Xinjiang, a set of continental dark mudstones developed in the Lower Permian Caragan Formation are 131.77 m thick in the northern Beilubui Reservoir. Eleven samples were collected for organic carbon content, rock pyrolysis , Chloroform bitumen “A”, ethnic composition, vitrinite reflectance and kerogen microscopy and other organic geochemical testing and analysis to explore its potential for hydrocarbon generation. The results show that the dark mudstone of the Kararagang Formation is characterized by high organic matter abundance (TOC average of 0.97%) and type Ⅲ (humic) of organic matter, with high thermal evolution (Ro average 1.19% and T max average 511.8 ℃) ), Which has some potential for hydrocarbon generation. However, due to its limited distribution, unstable thickness and poor tectonic preservation conditions, the comprehensive analysis shows that its exploration potential is rather limited.