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Classic Amplitude versus Offset (AVO) theory has developed a sound framework for understanding seismic rock physics in a noise-free context. (Foster et al., 2010) However, it has long been understood that noise in the offset domain becomes correlated in the various attribute domains, and can lead to “noise-forming”—the apparent rotation of attribute crossplots. (Cambois, 1998; Hendrickson, 1999; Saleh and de Bruin, 2000) In some domains such as Lambda-rho:Mu-rho reflectivity (LR:MR), noise-forming can actually lead to noisy attributes that are anti-correlated with the expected values (See Figure 1.) |
