波阻抗反演在奥陶系隔水层预测中的应用

Application of wave impedance inversion in forecast of Ordovician water-resisting layer

华北型煤田奥灰常规地震解释受分辨率制约对隔水层解释具有局限性。采用基于模型的波阻抗反演方法,提高了原有地震剖面的分辨率,有效解释了奥陶系含隔水层的顶、底界面。研究表明,波阻抗反演技术可以确定奥陶系顶部隔水层的分布特征,为保水采煤和区域注浆改造提供重要依据,为煤矿防治水害工作提供了可靠保障。

Ordovician regular seismic interpretation of north china type coalfield had limitation on interpretation of water-resisting layer restricted by resolution ratio. Wave impedance inversion method based on model was adopted, which enhanced resolution ratio of original seismic section and explained top and bottom interface of Ordovician water-resisting layer effectively. The study showed that distribution characteristics of Ordovician top water-resisting layer could be determined, which provided important basis for water resources preservation during mining and regional grouting reconstruction, as well as provided reliable safeguard to prevention and control of water disasters work in coal mine.