伊宁凹陷中二叠统铁木里克组沉积特征及暗色泥岩分布

Sedimentary characteristics of mid-permian Tiemulike formation and the distribution of the dark mudstone of Yining depression

利用钻井、测井以及二维地震资料探讨了铁木里克组的分布、厚度和沉积相变化等，识别出了该组半深湖一深湖相、浊积扇、浊积水道等沉积相类型．通过测井约束地震反演揭示了铁木里克组暗色泥岩主要分布于凹陷北东部伊宁县-回民庄-坎北-伊2井所围的区域，其次为宁3井-伊参1井连线以北，以及宁4井附近．利用Ro-生烃率模型计算铁木里克组生烃量上限为4．89×10^8t，80％概率下的生烃量为1．19×10^8t．

Using drilling, logging and 2-dimension seismic data, the distribution, thickness and sedimentary variation of Tiemulike formation were analyzed and semi-deep lake facies, turbidite fan facies and tnrbidite channel facies were identified. Logging-constrained inversion showed that the dark mudstone is mainly distributed in the area close to Huimingzhuang, Kanbei and Yi-2 well in the north part of Yining depression, and then in the north part of the line from Ning-3 well to Yican-1 well, along with the area around Ning-4 well. Using hydrocarbon-generating model, the upper limit of the hydrocarbon generation of Tiemulike formation was calculated to be 4.89×10^11kg and the hydrocarbon generation to be 1.19×10^11 kg of 80% probability.