封隔器在射孔管柱中的安全距离评估

Assessment Packer in Perforating String in Safety Distance

在射孔作业时,为了避免射孔管柱中封隔器解封或损坏,保障作业安全,需要确定封隔器与射孔枪串的安全距离。分析了井液中压力波的形成、衰减和反射过程,根据封隔器的承压技术指标,通过压力波的衰减和反射规律,理论计算了封隔器在不同套管条件下的安全设置距离。针对7in*枪、9 5/8in套管和1 300m液柱的高度,安全距离设计为31.3m并进行了安全评估。该研究为指导封隔器的安全距离设计提供理论依据。

Using packer in the perforating string,in order to avoid unblocking packer or damage,protect job security,we need to determine the safe distance between packer and perforating gun string.This article analyzed the process of pressure wave generation,attenuation and reflection in the drilling fluid.According to the packer pressure specifications,through pressure wave attenuation and reflection law,theoretically calculated packer security settings distance under different conditions of the casing;and for the 7 in gun,9 5/8in casing,the height of the liquid column of 1 300 m,a safe distance of 31.3 m were designed to evaluate safety.This study provides a theoretical basis for the safe distance design of packer.