Data
Evaluation in AVO
Analysis
Yang Zhili; Fan Guozhang; Lv Fuliang; Wang Bin; Yang Taotao
AVO analysis
is used more and more in exploration activities,but for interpretation problems or seismic
data
problems,usually the AVO
analysis
result is not correct.
Evaluating seismic data
before doing AVO
analysis
can reduce the risk sharply. Base on the seismic
data
evaluation,we can decide whether the
data
is meet the AVO
analysis
requirement or not, or which
data
is better.
Data
evaluation Before doing AVO
analysis
mainly including four parts:(1)amplitude energy compensation,(2) the angle rang of CRP gathers,(3)
velocity
and(4) normal move out correction. The amplitude energy compensation should properly, offshore
data
we can evaluate it by evaluating the seafloor reflection ;The angle rang of CRP gather would as big as better , different angle rang CRP gathers may show different characters ;The
velocity
should be correct and smoothly;And normal move out correction should be correctly. Each of the four parts can influence the AVO
analysis
result,so all of them are very important.
The failed probability of AVO analysis
result can be cut down by
data
evaluation.
AAPG Search and Discovery Article #90163©2013AAPG 2013 Annual Convention and Exhibition, Pittsburgh, Pennsylvania, May 19-22, 2013