深水司钻压井法安全压力余量及循环流量计算  

Calculation of safety pressure margins and circulation rate of well killing by deep water driller' s method

作　　者：王志远[1] 孙宝江[1] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2008年第3期71-74,83,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'863'计划重大项目(2006AA09A106);教育部博士点基金(20060425502);山东省自然科学基金(Z2007A01)

摘　　要：深水司钻法是一种适应于深水井控的压井方法。针对深水钻井和井控的特点,给出了动态安全压力余量的求解方法以及静态安全压力余量的推荐值,并在此基础上给出了井控安全循环流量的求解方法。结果表明:在井深和钻井液密度窗口一定条件下,动态安全压力余量随着水深的增加而增大,随着泥浆池增量的增大而减小;节流管线尺寸一定时,两循环周的最大流量随水深的增加而增加;水深一定时,两循环周的最大循环流量随着节流管线内径的减小而减小;随泥浆池增量的增加,第一循环周的最大流量减小,而第二循环周最大流量不变;由于海水的低温会使节流管线摩阻增大,随着海水温度的降低,第一及第二循环周最大流量降低。Deep water driller＇s method is a suitable well killing method for deep water well control. In response to the charac-teristics of deep water drilling and well control, the solution method of dynamic safety pressure margin was deduced and the recommended value of static safety pressure margin was given. And the solution method of circulation rate was developed. The results show that the dynamic safety pressure margin increases with well depth increasing and decreases with pit gain rising when the well depth and drilling fluid density window are constant. When the size of choke line is constant, the first and second maximum circulation rates increase with the well depth increasing. When the well depth is constant, the first and second maximum circulation rates decline with the size of choke line decreasing. With the pit gain decreasing, the first maximum circulation rate declines, but the second maximum circulation rate does not change. The choke line friction loss increases duo to low temperature in deep water. And with the temperature decreasing, the first and second maximum circulation rates decrease.

关 键 词：压井 深水司钻法 安全压力余量 循环流量 

分 类 号：TE21[石油与天然气工程—油气井工程]