沁水盆地煤层气地震储层预测技术方法研究

摘要

With the implementation of 3D seismic exploration technique in Zhengzhuang CBM demonstration district in Qinshui basin, research on CBM seismic reservoir forecast technology was carried out. Forecast of distribution range of coal seams, variation of thickness was made by using rock geophysical analysis, extension frequency, frequency division, wave impedance model inversion, etc. Prediction of CBM enrichment zone was made by using forward simulation, seismic frequency fading and calculation of arc length methods. The results of 3D seismic reservoir forecast are remarkable in Zhengzhuang CBM demonstration district, which provided reliable data for well location arrangement, computation of reservoir, development proposal design and adjustment of production well pattern%随着三维地震勘探技术在沁水盆地郑庄煤层气示范区的实施，煤层气地震储层预测技术方法研究得以更好的开展。采用岩石地球物理分析、拓频、分频及波阻抗模型反演等方法，开展了煤层分布范围、厚度变化的预测，采用正演模拟、地震频率衰减及弧长属性计算等方法，开展煤层气富集区预测。郑庄煤层气示范区三维地震储层预测效果明显，为井位部署、储量计算、开发方案设计及生产井网调整提供了可靠依据。