1. College of Geo-resource and Information, China University of Petroleum, Beijing City, 102249, China;
2. State Key Lab of Oil&Gas Resources and Prospecting, China University of Petroleum, Beijing City, 102249, China;
3. Dagang Oil-field Company, Tianjin City, 300280, China;
4. Gu-2 Business Project, Shengli Oilfield Company, Gudao Production Plant, Shandong Province, 257000, China
Abstract：Due to different acquisition time and different types of logging instrument used in well logging data acquisition,some problems,such as inconsistent calibrations,measured values not reflecting the real conditions for the strata,failing to resolve sand and shale,the difference between acoustic logging method and seismic method and so on exist in the acoustic logging curves for the shallow layers in old oil-fields,the problems above then cause poor results for prediction of thin layer sand bodies by using seismic impedance inversion method.In order to solve the problems a set of pre-processing technique including acoustic caliper correction,standardization processing,and velocity correction was summarized to reconstruct the acoustic logging curves by taking deep lateral resistivity as reference curve.The application results for the reconstructed curves in a block of Gang East area demonstrated that the correlationship between the borehole-side seismic traces and the synthetic records which were made by using reconstructed acoustic logging curves were obviously increased,the ability for the inversion results to resolve sand and shale was greatly raised,which matched the drilling results very well.
