CHARACTERISTICS OF THE NEOGENE SEDIMENTARY FACIES AND THEIR SIGNIFICANCE FOR OIL-GAS PROSPECTING IN YAHA AREA, XINJIANG

Taking the advantage of high horizontal resolution, the seismic data are used, with logging data, to describe the distribution of river channels by researches of seismic facies, amplitude attributes, coherence cube and visualization techniques. The distribution of river channel, flood land, flood plains, crevasse fan, point bar deposit and other sedimentary facies are analyzed. There developed 7 periods of large river channels in Neogene, with total area of 619 square kilometers. Of those river channels, 75 square kilometers are favorable prospecting area.