摘要
井涌余量是正确判断能否安全关井和压井的重要参数,文章以深水钻井为研究对象,采用理论推导和实例验证的方法开展了密度井涌余量的计算分析。以节流阀、防喷器、套管鞋地层和套管抗内压四个对象的承压能力为最大关井套压约束条件,在考虑深水井筒温度剖面、环空和节流管汇循环压耗的基础上,建立了关井、司钻法和工程师法压井井涌余量的计算模型,并以南海深水实例井的数据验证了模型的可靠性。在此基础上分析了泥浆池增量和溢流发生深度对井涌余量的影响,并提出了相应的技术应对措施。文章的研究结果可以为深水钻井井控工作的安全进行提供一定的理论指导。
Kick tolerance is a key parameter to diagnose whether shut- in operation and killing well operation. Taking deepwater drilling as the research object,the density kick tolerance was calculated and analyzed by adopting the methods of theoretical derivation and example verification. Using the bearing capacity of throttle valve,BOP,formation at casing shoe,resistance to internal pressure of casing as the constraint conditions of the maximum CPSI,and considering the borehole temperature profile and pressure loss of annulus and choke manifold,the calculation model of density kick tolerance of shut- in and killing well using driller's method and engineer's method was established,and the reliability of the model was verified by using the data of deepwater wells in the South China Sea. At the same time,the effects of pit gain and the depth where overflow occurs on density kick tolerance were analyzed,and the corresponding technical measures were put forward to improve the density kick tolerance. The results of this study could provide certain theoretical guidance for safe operation of deepwater drilling well control.
出处
《钻采工艺》
CAS
北大核心
2016年第2期23-26,2,共4页
Drilling & Production Technology
关键词
深水钻井密度井涌余量
最大关井套压
压耗
井控
deepwater drilling
density kick tolerance
maximum CPSI
pressure loss
well control
