【摘要】 建立缝洞型储层空间几何形态及岩石物理参数与地震响应之间的关系是碳酸盐岩缝洞型储层定量描述及油气预测的关键,而地震响应特征分析是以精确成像为前提。本文基于非均匀介质条件下波动方程正演模拟技术,研究了不同采集参数及成像方法对缝洞型储层产生的"串珠"状反射特征影响。正演模拟结果表明,减小道间距和近道叠加有利于缝洞体在地震剖面上反射能量的提高,叠前偏移成像是研究缝洞型储层必要处理手段。文中定量分析了缝洞型储层纵横向发育尺度、充填物类型及背景围岩因素对反射特征的影响,得到的结论对认识实际缝洞型储层反射特征提供了依据。更多还原

【Abstract】 Establishing the relationship among seismic response with space geometry and petrophysical parameters of fracture-cavern reservoir is the key to quantitative description and prediction of carbonate fracture-cavern reservoirs,and seismic response characteristics analysis is a premise of accurate imaging.Based on the numerical simulation of heterogeneous media,we discuss impacts of different acquisition parameters and imaging approaches on bead-like reflection characteristics of fracturecavern reservoirs.Forward modeling results show that reflection energy in fracture-cavern body on seismic sections become stronger when smaller group interval and near offset stack are adopted,and that prestack migration imaging is a must for fracture-cavern reservoir analysis.In this paper,we analyze quantitatively influences of vertical scale,lateral scale,infilling types,and background factors on reflection characteristics of fracture-cavern reservoirs,and get some meaningful conclusions,which provide a scientific basis to understand reflection characteristics of actual fracture-cavern reservoirs.更多还原