Full-cycle prediction of gas production variations in gas wells using different production methods

¹ First Gas Production Plant of PetroChina Changqing Oilfield Company, 718500 Yulin City, China
² Xi’an Key Laboratory of Wellbore Integrity Evaluation University, Xi’an Shiyou University, 710065 Xi’an City, China

^* Corresponding author’s email: cjr88112@163.com

Abstract

Gas production from gas wells is affected by formation pressure and wellbore outflow during gas production. To increase the daily gas production and obtain smooth and efficient gas production gas wells, methods such as wellbore shut-in pressure recovery and foam injection and drainage for gas production are usually adopted. In this paper, the gas-carrying liquid model, capacity prediction model, and pressure recovery model are utilized to establish a full-cycle production prediction method for newly developed gas wells. Combining the initial development pressure, gas production, and water production parameters of the gas well, the gas production prediction is obtained for the next few years. Meanwhile, the implementation time of the forced drainage method is calculated and obtained.