大牛地低产气井产气剖面测井资料解释方法探讨

当气井产量较低时,由于气相速度不足以将地层产水带出井筒,随着开发的时间推移,井筒内积液将不断增多,最终造成气井水淹,影响气井产能.文中建立了气携水状态下的力学模型,用于计算气携水流动状态下的气相流量,并根据井筒中上、中、下三段流型特征,提出了三段式气相流量计算方法.将该解释方法用于大牛地低产气井产气剖面测并资料的解释,结果表明新方法的解释结果和实际生产状况更吻合,提高了解释精度.

A discussion on the interpretation method of gas production profile logging data in the Daniudi low yield gas well

When the gas yield is low,the gas velocity is not enough to take formation water out of the wellbore.As development time goes on,wellbore fluid will continue to increase,resulting in watering of gas well,which influences gas well productivity.In this paper,the mechanical model of the gas carrying water is established,which is used to calculate the gas flow in the gas carrying water dynamic state.According to the flow pattern characteristics of the upper,middle and lower sections of the wellbore,the three-section calculation method of gas phase flow is presented.The interpretation method is used to explain the log data of gas production profile in the low yield gas well.The interpretation result of the new method is more consistent with the actual production condition,which improves the accuracy of interpretation.