Abstract: Abstract:The concept,types and distributions of subtle reservoirs developed in Taibei sag are analyzed and discussed. The basic technical strategy for exploration of subtle reservoirs in this sag is proposed as following. Based on existing understanding,high-accurate sequences stratigraphic study should be conducted,including selecting play or block, defining sequences and determining targets; fully applying geophysical tools(e.g. seismic attribute, trace integration, phase interference body) to preliminarily determine the scope and the shape of sand body distribution; optimal selection of targets followed by decisive performing drilling. Once the preliminary prospecting is successful,a composite evaluation will be made by means of reservoir description technique.

Key words: 'Turpan basin, Hami basin, Taibei sag, subtle reservoir, non-structural trap, oil and gas exploration