基于Petrel的煤顶板三维地质模型及地应力模型构建
Construction of 3D geological and in-situ stress model of coal roof based on Petrel
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摘要: 对煤岩初始应力场的模拟，通常是将煤层、顶底板及上覆岩层概化为各向同性的板状体，而整个井田尺度范围的应力场模拟，若采用这种方法其精度有一定的局限性。为精确构建复杂地质条件下煤系地层物性参数模型，采用基于Petrel软件平台，井点数据插值，地震数据联络控制；通过测井数据计算，实验室测试数据矫正，构建了符合煤层起伏变化的三维结构模型及初始地应力模型；计算了研究区井田的煤层顶板弯曲能量指数，初步评估了顶板的冲击倾向性，并依据评判标准进行了分区。Abstract: The simulation of the initial stress field of coal rock generally generalizes the coal seam, roof and floor and overlying rock layer into isotropic plates, and the stress field simulation of the entire wellfield scale has certain limitations if this method is adopted. In order to accurately construct the coal and rock physical property parameters model under complex geological conditions, the 3D model that conforms to the fluctuation of coal seam was constructed by using Petrel software platform, well point data interpolation, seismic data liaison control, well logging data calculation and laboratory test data correction. The bending energy index of the coal seam roof in the study area is calculated, the bursting liability of the roof is preliminarily evaluated, and the roof is divided according to the evaluation criteria.
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