h dashtian - sharif university of technology
g.r jafari - shahid beheshti university
h nekouie
m.r kamali - national iranian oil company

this study presents a novel method in detection and identificatio of geological layers and sun layers using a combination of wavelet transform and conventional well log data . Well log data of one of the oil wells in south west of iran were analyzed and its geological formation interfaces were determined using conventional packages , then we use CGR and ILD logs and a combination of wavelet transform spectrum analysis in identifying strtigraphic formation interfaces. the results from wavelet transform coefficient analysis and conventional well log analysis were similar . we conclude that a pseudo-log , detailed wavelet coefficients of raw well log data, can be used as lithology identification and boundary layer detection in combination with conventional well log data and this method can be used were due to lack of some well logs the proper identification of geological formation is not possible.

wavelet transform, geological interfaces , well log data