石油钻采工艺2017，Vol.39Issue(6)：688-691,4.DOI:10.13639/j.odpt.2017.06.005
溢流环空压力峰值确定套管下深方法
Determination of casing setting depth based on peak overflow annulus pressure
霍宏博 1许杰 2谢涛 1李金蔓 2幸雪松 1林海2
作者信息
- 1. 中海石油(中国)有限公司天津分公司
- 2. 海洋石油高效开发国家重点实验室
- 折叠
摘要
Abstract
At present, shut-in pressure is the main factor that is taken into consideration when the casing setting depth is designed. In the actual process of well killing, however, the peak annulus pressure during the circulating out of the gas is higher than the annulus pressure during well shut-in. To prevent circulation loss in the whole process of overflow well control and reduce the effect of formation pressure uncertainty on well control risk, the peak annulus pressure was calculated by calculating the change of annulus pressure during the circulating of the overflow materials out of the borehole by means of circulative well killing, and the chart for the variation of peak annulus pressure with the overflow strength was established. Besides, it was proposed to determine the casing setting depth according to the peak overflow annulus pressure, combined with the formation fracture pressure. It is proved from the case calculation of an oilfield that this method can define the kick strength corresponding to the casing setting depth, and thus the uncertainty of formation pressure is the controllable and the casing setting depth is designed precisely.关键词
套管下深设计/井控安全/循环排气/井涌强度/环空压力/溢流Key words
design of casing setting depth/well control safety/circulating out of gas/kick strength/annulus pressure/well shut-in分类
能源科技引用本文复制引用
霍宏博,许杰,谢涛,李金蔓,幸雪松,林海..溢流环空压力峰值确定套管下深方法[J].石油钻采工艺,2017,39(6):688-691,4.
