泥浆帽理想井底压力模型研究初探

泥浆帽钻井技术是一项对付恶性漏失的实用技术,因其理论研究尚不完善且运用中还有较多的制约条件,而未能得到广泛的使用。文中重点对泥浆帽钻井过程中井底压力进行分析,以漏层处为节点,运用节点分析方法,提出井底压力平衡方程,从而提出泥浆帽高度及密度的方法,为泥浆帽钻井技术提供初步的理论参考。

Research on Floating Mud Cap Bottomhole Pressure Model

Floating mud cap drilling technique is a practical technology for pernicious leakage situation,it can't be widely applied because of imperfect theory and many condition restrictions.This paper emphatically analyzed the circulating pressure in floating mud cap drilling process.It took leakage zone as the nodal point,and gave the pressure balance equation with nodal analysis method.At last,the determination method of floating mud cap highness and mud density were put forward.It provided the preliminary theory reference for floating mud cap drilling technique.