摘要
在油管传输射孔(TCP)作业中,点火头压力主要根据套管中井液的静水压来计算,从而忽略了大直径管柱与套管之间明显存在的动压,这便存在提前射孔的风险。基于牛顿层流下的环状库特流理论,推导了动压与管柱几何尺寸及下放速度的解析关系式,并通过编程实现了多级管柱的动压叠加效应,指出了导致"憋压"效应的因素。
In tubing conveyed perforating （TCP） operation, the pressure of firing head is mainly cal- culated by static pressure of liquid in the well tube. The dynamic pressure is generally ignored, even when the tubing diameter is not obviously smaller to well tube. Thus there exists the danger of wrong perforation. Based on annular Couette flow theory in the framework of Newton laminar flow, theoretical formula to calculate dynamic pressure with geometrical dimensions and downward velocity of tubing is reduced. The cumulative effect of dynamic pressure of each tubing is accounted in the program, so the factors to result in shutoff pressure can be underlined.
出处
《重庆理工大学学报（自然科学）》
CAS
2014年第4期50-53,88,共5页
Journal of Chongqing University of Technology：Natural Science
基金
教育部高等学校博士学科点专项科研基金资助项目(20110184110017)
