Analysis of Annular Pressure Generation Mechanism and Research on Safety Evaluation

With the rapid increase of seasonal heating gas consumption in winter in the Beijing-Tianjin-Hebei region, the existing gas storage scale and injection and production well network in the central Hebei region can hardly meet the demand of storage capacity utilization and gas recovery. Therefore, the effective utilization of old Wells has become the goal of gas storage construction. However, the old Wells that have been put back into production are mostly converted from depleted reservoirs, which have different degrees of annular pressure problems. Through investigation and investigation, it is found that there are many factors causing annular zoning pressure. By analyzing the properties of Wells with high sulfur content and high temperature and pressure, this paper studies the mechanism of causing annular zoning pressure, and puts forward the safety management method, so as to make the safety evaluation of annular zoning pressure more comprehensive.