断层模型约束反演在煤层横向预测中的应用研究

在精细断层解释的基础上,以地震层位为趋势面,通过对趋势面局部微调,使各层面的变化趋势和空间关系更加合理。通过网格精度和地层厚度有控制构建包含断层在内的精细构造框架模型,并根据波阻抗的差异特征,利用断层模型约束波阻抗反演实现煤层的横向预测。实例表明,基于断层模型约束反演技术的煤层横向预测方法,可精细描述煤层尖灭、变薄、分叉合并、厚度变化等赋煤形态,经实际钻井资料验证吻合较好。

Application of Fault Model Constrained Inversion in Coal Seam Transversal Prediction

Based on fine fault interpretation, using seismic horizon as trend surface, through trend surface local fine tuning, make sure that each layer surface variation trend and spatial relationship more reasonable. Through grid accuracy and layer thickness controlled establishment of fine structure framework model including faults, according to different characteristics of the wave impedance, using fault model constrained wave impedance inversion can realize coal seam transversal prediction. Examples show that coal seam transversal prediction based on fault model constrained inversion can finely describe coaX hosting configurations of thinning and pinchout, splitting, merging and thickness variation etc., good agreement has been demonstrated by drilling verification.