Estimating Effective Moveout Parameters and Traveltime Model in an Orthorhombic Media
عنوان دوره: هجدهمین کنفرانس ژئوفیزیک ایران
کد مقاله : 1080-NIGS
نویسندگان
چکیده
The equation of hyperbolic normal moveout (NMO) as a function of the exact NMO velocity loses accuracy where the media is anisotropic or heterogeneous. Elliptical anisotropy is the only media where the reflection moveout is hyperbolic. The accuracy of velocity analysis is highly dependent on NMO equation which have to be rewrite for anisotropic medium. This study aims to estimate effective moveout parameters for each receiver depth in an orthorhombic media with one set of fractures, by fitting the best nonhyperbolic moveout surface on the first breaks multiplied by two. Traveltime was also modeled using the calculated effective moveout parameters and the modified reflection moveout equation for the orthorhombic media. The results indicated that the values of moveout parameters were larger in one direction and there were no dipping reflector in the studied area.
کلیدواژه ها
Title
Estimating Effective Moveout Parameters and Traveltime Model in an Orthorhombic Media
Authors
Abstract
The equation of hyperbolic normal moveout (NMO) as a function of the exact NMO velocity loses accuracy where the media is anisotropic or heterogeneous. Elliptical anisotropy is the only media where the reflection moveout is hyperbolic. The accuracy of velocity analysis is highly dependent on NMO equation which have to be rewrite for anisotropic medium. This study aims to estimate effective moveout parameters for each receiver depth in an orthorhombic media with one set of fractures, by fitting the best nonhyperbolic moveout surface on the first breaks multiplied by two. Traveltime was also modeled using the calculated effective moveout parameters and the modified reflection moveout equation for the orthorhombic media. The results indicated that the values of moveout parameters were larger in one direction and there were no dipping reflector in the studied area.
Keywords
nonhyperbolic reflection moveout, moveout parameters, residual moveout, orthorhombic media