In consideration of the problem of big heat loses,influencing development effect and poor consolidation in formation as bare tubing is used for steam injection,cement annulus is damaged easily in steam injection and channeling is caused outside the tubing during the steam soak in Xinzhuang and Yanglou Oilfields,a technique for heat insulation and injection and production inφ139.

Gas Injection-production Mechanism of Gas Storage in Depleted Oil Reservoirs

This article researches the injection-production system in one segment of Huabei Oilfield,analyzes the injection-production system of whole segment and decides the reasonable injection-production system,from well pattern adaptation,ratio of injection-production and well numbers,pressure adaptation,reasonable pressure level.

Considering the pore pressure of injection/production around the refracturing well under coupling liquid/solid, mathematical models are established to describe the maximum principal stress and orientation angle of maximum principal stress induced by pore pressure around refracturing wells.