Abstract
Density information is very difficult to obtain using conventional PP reflection data. This is because the AVO effects are not sensitive to density changes in PP reflection equation (Lines, 1999). Moreover, Aki-Richards or Zoeppritz equations of reflected and refracted energy partitioning are not stable when the incident angles reach the critical angles where most of the density information is found in PP and PS reflections. This makes it even more difficult to get reliable density information from PP inversion, even including long-offset data.
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