An analytical study on early kick detection and well control considerations for casing while drilling technology |
| |
Authors: | Said K Elsayed Hany M Azab Adel M Salem |
| |
Institution: | Faculty of Petroleum and Mining Engineering, Suez University, Suez 43528, Egypt |
| |
Abstract: | Casing while drilling (CwD) technology is designed to reduce drilling time and expenses by improving the wellbore stability, fracture gradient, and formation damage while reducing the exposure time. However, for the purpose well control, the wellbore geometry and volumes differ from those obtained via a conventional drilling technique, thereby requiring a different approach. This study discusses well control principles for CwD operations. It presents a simplified method for evaluating the maximum kick tolerance and allowable well shut-in time for both conventional and CwD techniques using a mathematical model. Preliminary results revealed that the use of CwD leads to an annulus pressure loss three times higher than that observed in the conventional drilling. In addition, the kick tolerance is reduced by 50% and the maximum allowable well shut-in time is reduced by 65%, making an early kick detection system necessary. |
| |
Keywords: | casing while drilling conventional drilling kick tolerance early kick detection well control |
|
| 点击此处可从《中国科学技术大学学报》浏览原始摘要信息 |
| 点击此处可从《中国科学技术大学学报》下载免费的PDF全文 |