摘要
地层可钻性是钻井设计与施工的重要参考依据,准确获取地层可钻性对于正确选用破岩工具、减少井下复杂情况、优质高效安全钻井具有十分重要的意义;但由于砾岩地层具有严重的各向异性,往往很难准确确定其可钻性级值。文中通过室内实验的方法,研究砾岩层可钻性与砾石粒度中值、体积分数等因素之间的关系,并拟合出经验公式。
Formation drillability is one of the important parameters during the process of drilling design and operation.In order to get exactly the formation drillability is of very great significance for correct selection of drilling tools,less occurrence of complex down-hole situations,high quality and safe drilling operation.However,because the conglomerate formation has serious anisotropy,it is difficult to determine accurately its drillability.In this paper,through the laboratory experiment,the relationship among the drillability of conglomerate formation,the median size of gravel and the volume fraction of gravel is studied and an empirical expression is derived.
出处
《断块油气田》
CAS
2013年第4期502-504,共3页
Fault-Block Oil & Gas Field
基金
国家大学生创新创业训练计划项目(111042513)
关键词
砾岩层
砾石尺寸
砾石体积分数
可钻性
conglomerate formation
gravel size
volume fraction of gravel
drillability
