复杂高压气井地层出水判别及评价新方法

基于气井见水和出水量增大时气井水样氯根含量增大和气井产量稳定油压突降的特征,气井见水初期,可根据氯根浓度变化及油压突降来判别见水和评价产水量; 气井高含水期,可根据气井生产动态数据利用垂直管流估算法评价气井产水状况,即在气井垂直管流模型的基础上,利用气井产量、油压、油压下降速度等生产参数求解气井产水量。目前已形成了"由站到井"的复杂高压气井见水判别方法,并在判别特征参数( 氯根含量、日产气量、油压等) 上发展出了新的出水评价方法。该套方法简明实用,能有效判别及评价气井生产全时期的产水状况,为气田治水措施采纳、开发方案综合调整提供了参考依据。

NEW METHOD TO DISTINGUISH AND EVALUATE WATER BREAKTHROUGH OF COMPLICATED AND HIGH PRESSURED GAS WELL

Through continuous practice and explore,Tarim oilfield has formed a new method,which can distinguish and estimate formation water breakthrough.That is in the early breakthrough period,the water breakthrough and water production were distinguished and estimated based on the change of chloride concentration and sharp reduce of oil pressure,in the high water-cut stage,based on gas well production dynamic date,using vertical conduit flow model estimated formation water production rate.This method was so simple and utility that could effectively distinguish and evaluate the gas well’s water producing status in the whole producing process,which was valuable for guiding the production of the gas field.