Abstract: The member?1 dolomitic rocks of the Permian Fengcheng formation in west slope of Mahu sag in Junggar basin belong to a fractured reservoir, from which high?yielding oil?gas flow has been obtained in some wells. This paper comprehensively studies the high?quality dolomitic reservoir and its geological features, by which describes such a high?quality and fractured reservoir in this area using seismic multi?attributes technique, and predicts that there are three high?quality and fractured reservoir zones in this member?1 dolomitic rocks, with an area of 471 km2, providing basis for further detailed prospecting in this area