A new approach to analyzing wellbore pressure dynamically in well-killing

Casing pressure during well-killing is both an unknown variable that must be addressed and a time-dependent function. Therefore, the calculation of dynamic reaction wellbore indeterminate boundary problem. Due to intricacy analytical solution technique, finding for issue uncertain boundaries nearly impossible. Current numerical simulation software only capable resolving problems with defined bounds (such as flow or pressure) incapable continuously calculating pressure, which varies dynamically time. Developing computation method can solve this issue. Based on mathematical model definite conditions response under conditions, paper applies finite difference principle constructs choke kill through reasonable mesh division gradual iteration process. The resultsdemonstrate maximum wellhead casing value time node peak are highly congruent measured data, indicating method’s high reliability highlighting its significance progress oil gas well control safety.