【摘要】 煤储层实质上是煤及其赋存流体的沉积层,本文设计了赋存不同流体的薄煤层模型,通过地震AVO技术来进行正演模拟,分析含不同类别流体储层的反射系数曲线随入射角度变化特征及叠前道集的振幅特性。认为赋存不同流体的薄煤层AVO特征存在明显差异,赋存气体的薄煤层模型反射系数最大,叠前振幅最强,且主要受储层顶板岩性影响。更多还原

【Abstract】 Coal reservoir is a deposited layer of coal and fluid occurrence.This paper designs different thin coal models with different occurrence-fluids.The seismic AVO-technique is used for forward simulation,which analyzes the amplitude characteristics of reflection coefficient curve with the alteration of offset angle.The obvious differences in thin coal AVO characteristics with different occurrence-fluids are discovered,and reflection coefficient in gas model is the biggest with the strongest pre-amplitude,which is mainly affected by roof lithology.更多还原