AVO叠前反演技术研究Study on AVO pre-stack inversion technology
李艳玲
LI Yan-ling(Exploration and Development Research Institute of Daqing Oilfield Company Ltd.
摘要(Abstract)：
AVO叠前反演技术是油气勘探领域正在兴起的一项新技术。AVO叠前反演所依据的是岩石物理学理论和振幅随偏移距变化理论,通过借助于Zoeppritz方程或近似式,对CDP道集反射振幅的变化作最小平方拟合,直至理论与观测值很好的拟合为止,最终导出泊松比、拉梅常数、体积模量、切变模量和杨氏模量等弹性参数,进而进行岩性识别。介绍了AVO叠前反演的理论,并结合实际对AVO叠前反演理论进行了分析。
AVO pre-stack inversion technology is a new rising technology in hydrocarbon exploration. The foundations of AVO pre-stack inversion are petrophysical theories and the theory that vibration amplitude varies with the variance of migration distance. Through Zeoppritz equation or approximate expression, least square fitting is conducted to CDP trace assemblage reflection amplitude variance, till a very good fitting between theory and measured value. Finally elasticity constants such Poisson ratio, Lame constant, bulk modulus, shear modulus, and Young's modulus are induced out for further lithology identification. AVO pre-stack inversion theories are introduced and the theories are analyzed combining reality.
关键词(KeyWords)：
AVO;叠前反演;射线追踪;入射;反射;透射
AVO; pre-stack inversion; ray tracing; incidence; reflectance;transmission
基金项目(Foundation):
作者(Author):
李艳玲
LI Yan-ling(Exploration and Development Research Institute of Daqing Oilfield Company Ltd.
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