【摘要】 中国东北地区晚古生代地层具有油气资源潜力,是东北地区深部油气勘探的接替层系。基于野外观察、测井等资料,结合东北地区上二叠统构造、沉积等方面的研究成果,分析研究区上二叠统暗色泥岩发育展布特征及其生烃潜力。结果表明:东北地区上二叠统暗色泥岩分布范围广,构成以松辽盆地四站地区、内蒙古索伦地区、官地地区为沉积中心的暗色泥岩展布特征,暗色泥岩厚度整体上具有南厚北薄、西厚东薄的特点;297件暗色泥岩样品有机碳质量分数为0.03%～2.42%,其中中等—好暗色泥岩占比为68.68%;暗色泥岩有机质类型以Ⅱ型干酪根为主,发育Ⅰ型及少量Ⅲ型干酪根;镜质体反射率分布在0.86%～5.47%之间,其中属于过成熟阶段的样品占69.72%,106件暗色泥岩样品最高热解温度分布在402.00～593.00℃之间,处于高熟阶段的样品占比为51.89%,暗色泥岩有机质成熟度整体为过成熟阶段;中国东北地区上二叠统有良好的油气资源前景,可成为中国东北地区深部油气勘探的新层系。该结果为中国东北地区晚二叠世地层的勘探与开发提供参考。更多还原

【Abstract】 The Late Paleozoic strata in Northeast China have potential for oil and gas resources and are a successor to deep oil and gas exploration in the Northeast.Based on the field observation and logging data,combined with the research results of the Upper Permian structure and sediments in Northeast China,the developmental distribution characteristics and hydrocarbon generation potential of the Upper Permian dark mudstone in the study area are analyzed.The results show that the Upper Permian dark mudstones in the northeastern region are widely distributed,and they are characterized by the distribution of dark mudstones in the four stations of the Songliao Basin,the Sauron Area of Inner Mongolia,and the Guandi Area.The dark mudstone thickness is generally thick in the south.The characteristics with thin in the north,thick in the west and thin in the east;the organic carbon mass fraction of 297 dark mud samples is 0.03%～2.42%,of which the medium-good dark mudstone ratio is 68.68%;the dark mudstone organic matter type is mainly typeⅡ,development typeⅠ and a small amount of typeⅢ kerogen;the vitrinite reflectance is distributed between 0.86% and 5.47%,69.72% samples are over-mature,and the highest pyrolysis temperature of 106 dark mud samples is 402.00～593.00 ℃.Among them,the samples in the high maturity stage accounted for 50.94%,and the maturity of the dark mudstone organic matter was over mature.The Upper Permian in Northeast China has good oil and gas resources prospects and can become a new layer of deep oil and gas exploration in Northeast China.The results provide a reference for the exploration and development of the Late Permian strata in Northeast China.更多还原