Research on Prediction Method of Drilling and Falling Recovery Law in Productivity Area

With the expansion of production scale in recent years, the drilling drop in Sazhong Development Zone has a greater impact on output. From the statistics of recent years, the annual output of drilling drop affects an average of 106,000 tons, which is 2 to 3 times the output of new wells that year. Judging from the characteristics of the dynamic changes in the whole process of drilling and dropping, there are great differences in the dynamic changes in different blocks, different oil layers and different well spacing conditions. The dynamic response time of the Sapu oil reservoir is earlier than that of the Gaotaizi oil layer; the smaller the well spacing, the earlier the dynamic response time; However, there are few conclusive literatures on the effects of drill-down, and there is little discussion on the degree of drill-down effects. In order to further study the drill-down rule under different well patterns, different pressure levels, and different oil layer properties, and to further quantitatively study the degree of the drill-down effect, this paper takes the North East Block Duandong block as the research object, and analyzes different wells during the drilling recovery process. The in-depth study of the factors affecting the drill-down under different conditions of the network, pressure level, and different oil layers is carried out, and the law of drill-down recovery is summarized; combined with the theory of percolation, mathematical statistics is used to predict the influence of the drill-down to arrange the production operation for the next year As well as the preparation of the drill-down recovery plan to provide theoretical guidance.