摘要：Accurately predicting the wellbore annulus ECD is a prerequisite for safe and efficient drilling. To enhance its calculation accuracy, a calculation model of drilling fluid density is obtained by using multiple linear regression method based on the rheological test data of water-based drilling fluid under high temperature and high pressure, and a calculation model of ECD in the annulus of small borehole at high temperature and high pressure is further established. The results show that the higher the ground temperature gradient increases, the higher the annulus temperature grows and the smaller the annulus ECD decreases; the smaller the annulus size reduces, the larger the annulus ECD increases; the presence of cement line leads to the lower temperature and the larger the annulus pressure consumption, which in turn leads to the larger annulus ECD. ? The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

ISSN号：2211-0984

卷、期、页：卷176：905-913

发表日期：2025-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）,CPCI-S（科技会议录索引）

发表期刊名称：Mechanisms and Machine Science

参与作者：陈超

通讯作者：张伟,王全得,沐华艳,杜明亮

第一作者：蒋官澄,贺垠博,董腾飞

论文类型：会议论文

论文概要：张伟,蒋官澄,陈超,贺垠博,董腾飞,王全得,沐华艳,杜明亮，Calculation Model of ECD for Slim-Hole Annulus at High Temperature and High Pressure at Sea，Mechanisms and Machine Science，2025，卷176：905-913

论文题目：Calculation Model of ECD for Slim-Hole Annulus at High Temperature and High Pressure at Sea