江汉白垩系断陷盆地冲积扇沉积储层预测方法优选

对江汉白垩系冲积扇沉积储层进行模式识别及定性预测，从振幅、波阻抗、速度三种方法预测结果比较分析看，速度反演结果更可信、更可靠，速度反演为该区白垩系储层预测的主要敏感参数，对江汉白垩系下步勘探有重要指导作用。结合钻后效果分析，认为速度反演更能有效区分砂、砾岩，是白垩系冲积扇储层预测最有效手段之一。

On Method Optimization for Forecasting Reservoir with Alluvial Fan Deposit in Jianghan Cretaceous Graben Basin

This paper has conducted pattern cognition in and qualitative forecasting for reservoir with alluvial fan de- posit in Jianghan Cretaceous Graben Basin. Comparative analysis of forecasting outcomes by means of amplitude, wave impedance as well as velocity shows that the outcomes are more dependable by using velocity inversion, which is a main sensitive parameter in forecasting Cretaceous Reservoir in Jianghan and plays an important role of guide in the next exploration. Effect analysis of well completion proves that velocity inversion can distinguish between sand- stone and conglomerate more effectively and is one of the most efficient methods in forecasting Cretaceous Reservoir with alluvial fan deposit.