Abstract: After the well YM9 acquired commercial oil flow, the later exploration in Yingmai 9 structure suffers series of setbacks. In order to recognize correctly the structure shape and predict oil and gas distribution, a study of trap description and reservoir prediction was developed in the area. Based on the old seismic layer mark,a new reasonable one is obtained; and the fine structure map of the goal layer and some dominants of each trap are obtained through a fine structure interpretation; and the reservoir thick property and oil saturation are predicted through some kinds of methods based on inversion of acoustic impedance. On the basis of these, the reasonable advice is provided for the next exploration and exploitation in the area. A new knowledge is obtained which is obviously different from the former researcher's, and which the reason of the exploration failure can be perfectly explained.

Key words: Tarim basin, Yingmaili, structural trap, reservoir, prediction, stratigraphic correlation, acoustic impedance, inversion