【摘要】 塔中地区石炭系泥岩是该区下奥陶统古潜山和石炭系内部油层的区域性盖层，它具有物性封闭、压力封闭、烃浓度封闭三种封闭机理，对该区油气的聚集与保存起着重要的作用。在对其宏观和微观封闭特征进行全面分析的基础上，用主要评价参数划分盖层封闭能力的等级并赋予不同的权值，再利用加权平均法计算盖层综合评价权值的方法，对塔中地区石炭系泥岩盖层进行了综合评价，认为该区石炭系泥岩盖层具有好—中等的综合封闭能力。更多还原

【Abstract】 The shale of Carboniferous in central Tarim basin, the regional caprock overlying the oil/gas reservoir in buried hill of Lower Ordovician and Carboniferous, possesses three kinds of sealing mechanisms(physical sealing, pressure sealing and hydrocarbon concentration sealing) and plays an important role in oil/gas accumulation and preservation in the area of interest. Its comprehensive evaluation in this paper is based on the synthetic weight calculation from weighted averaging of different values which are set to different ranks of its seal capacity classified with major evaluation parameters following systematic analysis of its macroscopic and microscopic seal characteristics. Results showed that it has good-medium sealing capacity .更多还原