Geman范数约束的频率域反射系数反演  

Reflectivity inversion in frequency domain based on Geman norm constraint

作　　者：王本锋[1,2] 陈小宏[1,2] 刘国昌[1,2] 陈增保[1,2] 王显南 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)CNPC物探重点实验室,北京102249 [3]中海石油(中国)有限公司深圳分公司,广东深圳510240

出　　处：《石油地球物理勘探》2014年第4期667-671,2-3,共5页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目(U1262207;41074098);国家科技重大专项课题(2011ZX05023-005-005)联合资助

摘　　要：以Geman范数为约束,利用加权重迭代法在有效频带内进行频率域反射系数反演,不仅减弱了高频噪声影响,而且可获得高分辨反射系数序列。反演结果既可分辨小于调谐厚度的薄层,又具有一定的抗噪性。考虑到地下介质的非均匀性和黏滞性,在反射系数反演中兼顾了衰减信息的处理,较好地消除了子波及其衰减的影响,获取了更可靠的反射系数序列,有利于后续的数据处理及资料解释。模型数据测试结果验证了方法的有效性。Reflectivity inversion in the effective frequency band with re-weighted iterative method based on Geman norm constraint can not only weaken high frequency noise,but also obtain high resolution reflectivity series.Inversion results can distinguish thin layers with thickness smaller than tuning thickness,and it is also robust with some noise immunity.Because of subsurface heterogeneity andviscosity,attenuation information in reflectivity inversion is used to eliminate wavelet influence and its attenuation,and to obtain more reliable reflectivity series which are useful for subsequent data processing and interpretation.Tests on synthetic seismic data demonstrate the validity of the proposed method.

关 键 词：反射系数反演 Geman范数 加权重迭代 调谐厚度 地层吸收衰减 

分 类 号：P631[天文地球—地质矿产勘探]