After integra ted interpretation of the hole core, well-logging and 3D data, it is found out why the variation of coal thickness in Hole T4 and the trend of coal thickness in this region.

• 后期的地面钻探补充勘探结果表明:通过对三维地震信息的综合地质解释,认为该区煤层厚度变化主要是沉积原因的结论是正确的;