摘要
岩石可钻性一般需要通过钻井取心,然后进行室内微钻头实验测定得到,室内实验费时费力,需耗费一定的成本。利用通用钻速方程中岩石可钻性与机械钻速的关系,反推求取岩石可钻性级值,给出了推导过程,得到了岩石可钻性求取方程。运用该方程对大牛地大88井和PG5井实钻录井数据进行计算,得到了岩石可钻性剖面,可以进一步指导钻头选型。
Generally, rock drillability may be gained from some experimental measurements of drill bit. But, these experiments are not only time-consuming but also costly. In this study, the grade value of drillability is at first deduced by analyzing the relationship between drillability and penetration rate（ROP）in drilling-rate equation; and then, a deduction process is obtained; at last, an equation to acquire drillability is also obtained. This equation was applied to Da 88 and PG 5 wells in Daniudi gasfield. After its application, a rock-drillability profile was gained, which can further guide bit typeselection.
出处
《天然气技术与经济》
2014年第3期41-43,47,共4页
Natural Gas Technology and Economy
基金
国家科技重大专项"大牛地低渗透气田特殊结构井钻完井及改造技术"(编号:2011ZX05045)部分成果
关键词
大牛地
下古生界
岩石可钻性
钻速方程
Daniudi gasfield
lower Paleozoic
rock drillability
drilling-rateequation
