Abstract: With continuous increase of exploratory efforts, the targets for exploration in Tahe oilfield are more and more complex, which are dominated by non-structural reservoirs with buried depth of more than 4 000 meters. Such reservoirs are characterized by low amplitude structure, small sand thickness and large lateral variation, being difficult to identify and evaluate. For these problems, a series of technologies for identification and evaluation of deep clastic non-structural trap in Tahe oilfield is developed, including forward modeling, fine coherent fault interpretation, seismic waveform analysis, seismic attribute acquisition and optimization, seismic-logging inversion, 3D visual geologic object detection, etc., which provide powerful supports for further exploration in Taha oilfield and incremental reserves and production of northwest oilfield company.

Key words: Tahe oilfield, seismic exploration technique, non-structural trap, identification, evaluation, deep clastic rock