论文部分内容阅读
AVO效应反映了地震反射振幅随炮检距变化的特征。在一定条件下，利用AVO效应可以预测出储层参数并识别油气异常。然而，引起AVO效应的原因是多方面的，很难唯一地确定储层参数或判断油气的存在。多波AVO效应的研究有利于解决这种检测结果的多解性问题，尤其对薄储层，这项研究更有意义。本文选择含气和不含气的薄储层模型，利用完全形式的Zoeppritz方程，进行多波AVO效应的研究。认为对P－P波而言，不论薄层含水与含气，AVO效应均遵循调谐原理；对P－SV波和S－S波而言，不论薄层是否含气，都有明显的AVO特征。
The AVO effect reflects the characteristics of seismic reflection amplitude with offset. Under certain conditions, the AVO effect can be used to predict reservoir parameters and identify hydrocarbon anomalies. However, the cause of the AVO effect is manifold, and it is difficult to uniquely determine reservoir parameters or determine the presence of hydrocarbons. The research of multi-wave AVO effect is helpful to solve the multi-solution problem of this test result, especially for thin reservoirs. In this paper, the gas-bearing and non-gas-bearing thin reservoir models are selected, and the full-wave Zoeppritz equation is used to study the multi-wave AVO effect. For the P-P wave, the AVO effect follows the tuning principle regardless of the water-bearing and the gas-bearing. For the P-SV and S-S waves, there are obvious AVO features regardless of the gas content .