论文详情
岩性储层识别和评价是东部探区的重要勘探任务，高质量的成像道集是做好岩性储层识别和评价的基础数据。地层倾角成像道集是不同于张角成像道集的一种对成像结果的高维表征方法，与张角成像道集结合可以更好地表征有效反射能量在反射点处的传播方向、分布范围及其随方位角的变化等。从张角和地层倾角成像道集中反射波和绕射波的特征入手，分析了反射波和绕射波在两种道集中的区别与联系。指出了利用倾角成像道集的角度分布特征进行滤波器设计，可以滤除该成像道集中与反射界面倾角不相符的成分，达到提高成像质量，保真反射特征的目的。最后，通过理论模型数值试验证明这一成像质量改善方法的正确性及实用性。
The identification and evaluation of lithologic reservoir is very important for the exploration in Eastern China,which is mainly based on fidelity angle gathers.The quality of angle gathers and stack section is the foundation of the identification and evaluation of the lithologic reservoirs.As we know,the characteristics of reflection and diffraction from common opening angle and dip angle gathers are totally difficult.In this paper,we analyze the difference and relation between the reflection and diffraction wave in the opening angle and dip angle domain respectively.Then,we construct a filter by using the angle distribution in dip angle domain to improve the quality of imaging gathers.Because of the dip angle is consistent with the subsurface interface,this method can improve imaging quality and get the purpose of fidelity reflection characteristics.The numerical examples demonstrate the effectiveness of the proposed method.
中国石油化工股份有限公司科技部“非一致性时移地震深化研究及应用”项目(P13076)资助。