Abstract:

Normal logs cannot solve special geological problems for the influence of different geological factors.In view of reservoir quality in block 3 of Kalashayi Formation of Tahe oilfield, normal logs is transferred to spectrum analysis curves using spectrum analysis technique, and stratigraphic correlations are made using spectrum analysis curves to ensure the accuracy of  correlations.Log constrained inversion is employed in predicting sand reservoirs  in Kalashayi Formation based on the results of stratigraphic correlations and reconstructive logs，the application result shows it is of great value to reservoir prediction.

Key words: spectrum analysis, reconstructive logs, stratigraphic cyclicity, stratigraphic correlation, log constrained inversion