Abstract. The hilly gas-oil field is complex by its geological structure. The results of the trace researches on this field, the observation well testing and the application of conformance control methods are presented in the article. According to the results of these researches the channels of low filtration resistance are revealed. The creation of the artificial barrier preventing a water filtration in these channels is necessary. The carried-out injections of the sedimentation systems into the layer have allowed reducing the water cut of wells and rates of oil production decrease. The complex analysis of development condition of an operational object, the research of filtration streams and the application of methods of oil recover increase have allowed to improve the current state of development and to increase the efficiency of oil reserves' development.