Research on Wellbore Pressure Distribution Model for Injection Wells During Foam Flooding

Foam flooding technology is an effective measure of EOR in oilfield development. In order to properly design the injection project, it is necessary to study the pressure distribution state of foam along the wellbore in injection wells. Based on the existing flow law research of foam fluids in the wellbore, this paper introduced temperature field calculation of heat transfer between the wellbore and foam in the theoretical study. Considering both rheological properties and PVT characteristics of foam fluids, the wellbore pressure distribution model was established. The iterative calculation method was used to calculate the whole wellbore pressure distribution of foam injection wells. Based on the new model, the effects of parameters such as foam flow rate of liquid and gas, injection pressure, injection temperature and tubing diameter on the wellbore pressure distribution of foam were analyzed. Meanwhile, the wellbore temperature and pressure distribution profiles of one case well were calculated, which meet the requirements of engineering application. In this paper, the whole wellbore pressure distribution model which introduced foam characteristics and temperature field calculation of heat transfer was established, and relevant influencing factors were analyzed. It has the important guiding significance for establishment of a reasonable production system for foam flooding oilfield development.