复合式置换法压井参数计算研究

Calculation of Compound Displacement Well Killing Method

基于目前静/动态置换法压井研究中考虑最佳排气速度、排气流量、压井液最大泵入量、压井液下降时间等参数研究不完善,导致现场置换法压井作业缺乏一定理论指导,从而压井失败等事故发生。通过结合静/动态置换法压井特点并基于泛流理论分析,优化了静/动态置换压井法基础计算模型,提出了复合式置换法并建立了相应计算模型,以压井时间为窗口,确定了气体排放流量以及最佳排气速度、压井液下降时间以及最大泵入量、压井套管压力等计算参数。结果表明:复合式置换法压井能明显提高压井效率,减少压井事故发生,在一定程度上可用于指导现场置换法压井作业。

Based on the current static/dynamic replacement method in the well killing study,considering the optimal exhaust velocity,exhaust flow rate,maximum killing fluid pumping volume,and killing fluid fall time,the research is not perfect,resulting in a lack of certainty in the field replacement method killing operation.Theoretical guidance has led to accidents such as well killing failures.By combining the characteristics of the static/dynamic replacement method kill and based on the analysis of flooding theory,the static/dynamic replacement method kill basic calculation model was optimized,the compound displacement kill method was proposed,and the compound displacement method kill calculation model was established.Using the kill time as the window,the calculation parameters such as the gas discharge flow rate and the optimal exhaust speed,the dropping time,the maximum pumping volume,and the kill casing pressure were determined.The results show that the compound replacement method can obviously improve the efficiency of well killing efficiency and reduce the occurrence of well killing accidents.To a certain extent,it can be used to guide the on-site replacement method to kill operations.