Abstract:In the middle and late stages of the production of strong bottom water sandstone reservoirs, entering the medium and high water content period, the bottom water cone inlet phenomenon is prominent, the output is seriously decreasing, and it is necessary to take drainage control cone and other flow control field measures to maintain normal production, and clarify the main control influencing factors of the water content rise law of the reservoir and the water content rise mode can effectively guide the implementation of the process measures of the flow control field. Based on the production status of the nine areas of Tahe Oilfield, the water production of horizontal wells in the well area is statistically calculated, and the pattern of water rise of horizontal wells in the well area at this stage is summarized, and according to the geological and engineering characteristics of the well area, combined with the law mode of water content rise under different production stages, it is qualitatively analyzed in time and space The main control factors of the rising law of reservoir water content are calculated in combination with the grey correlation method and machine learning method, and the correlation degree of each influencing factor in different production stages in different regions is calculated, and the main control factor of the rising law of oil reservoir water content is analyzed in time and space. The results show that at present, the patterns of water content rise of horizontal wells in the ninth area of Tahe Oilfield are four types: climbing type, ladder type, rapid flooding type and open well flooding type. Combined with qualitative and quantitative analysis, the main controlling factors of the rising law of water content in the early stage of production: the structural position, the angle between the horizontal well section of the well and the direction of the ancient river channel in the water avoidance height, and the law of the rise of water content in the middle of the mining period is mainly spread by the interlayer within the layer. Reservoir heterogeneity is supplemented by late flow field regulation is mainly affected by reservoir heterogeneity and interlayer spread. It provides certain theoretical guidance for the implementation of process measures such as liquid extraction control and flow field regulation under different production stage conditions.