春光区块薄储层地震响应特征的模型正演分析  

Forward modeling analysis of seismic response of thin reservoir bed in Chunguang block

作　　者：王鹏飞[1] 刘桂林[1] 李嵩阳[2] 郭欢欢[3] 戴世灯[3] 曹鹏[3] 

机构地区：[1]中国石化河南油田分公司石油物探技术研究院,河南南阳473132 [2]北京邮电大学 [3]中国石化河南石油勘探局地球物理测井公司

出　　处：《石油地质与工程》2012年第6期64-67,147,共4页Petroleum Geology and Engineering

摘　　要：使用春光区块砂泥岩的速度、密度参数,建立了调谐楔形储层模型并进行了正演分析,明确了春光区块沙湾组储层的地震响应特征。理论计算与模型正演证明,沙湾组薄储层的调谐厚度约为8.7m,当储层厚度大于8.7m时,储层的顶界、底界基本可以标定在最大波谷、最大波峰,视厚度与真厚度基本相当或相等;当储层厚度小于8.7m时,薄储层的顶界、底界的标定位置向零相位发生漂移,视厚度显著大于真厚度,振幅强度与真厚度为正相关的关系。这些结论对储层精细标定、储层追踪、储层厚度预测、振幅属性解释等具有参考价值。In the Chunguang block, by using the velocity and density of the sand and shale to construct the tuning wedge model, then perform the forward simulation, indicate the character of seismic response of the thin reservoir bed. Theoretic calculation and forward modeling prove that the tuning thickness of the thin reservoir bed in Shawan formation is about 8.7 m. When the thickness of reservoir bed is greater than 8.7 m, the top and base of the reservoir bed are generally calibrated at max trough and max peak, apparent thickness and true thickness are roughly or exactly equal. When the thickness of reservoir bed is less than 8.7 m, the calibrating location of the top and base of the reservoir bed will drift towards the Zero Phase, apparent thickness is markedly greater than the true thickness. There is a positive correlation between apparent thickness and true thickness. The conclusions are valuable for horizon calibration, tracing reservoir bed, predicting thickness of reservoir bed, and interpreting the amplitude attributes.

关 键 词：春光区块 模型正演 楔形模型 调谐效应 

分 类 号：P631.445[天文地球—地质矿产勘探]