Evolution of gas kick and overflow in wellbore during deepwater drilling and advantage analysis of early gas kick detection in riser

被引：2

作者：

Xu Y. ^{[1
,2
]}

Jin Y. ^{[2
]}

Guan Z. ^{[1
]}

Liu Y. ^{[1
]}

Wang X. ^{[1
]}

Zhang B. ^{[1
]}

Sheng Y. ^{[1
]}

机构：

[1] School of Petroleum Engineering in China University of Petroleum(East China), Qingdao

[2] College of Petroleum Engineering in China University of Petroleum(Beijing), Beijing

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2019年 / 43卷 / 01期

关键词：

Deepwater drilling; Early gas kick detection; Gas kick and overflow; Mud pit gain; Riser;

D O I：

10.3969/j.issn.1673-5005.2019.01.007

中图分类号：

学科分类号：

摘要：

For oil and gas well-drilling in deepwater and ultra deepwater, the idea of making use of the advantage of the long length of the riser to monitor gas kicks at the bottom of the riser has become one of the hot spots for research. In this study, the flow and migration gas in wellbore were analyzed, considering the effects of water depth, drilling depth below the mud line, bottom hole pressure difference, formation permeability, and a two-phase flow model of gas-liquid in wellbore was established. The simulation results indicate that monitoring of the gas kicks at the bottom of the riser is more effective than that using the conventional mud level method in deepwater drilling under the conditions of water depth greater than 800 m, the drilling depth less than 2 800 m below the mud line, and the formation permeability less than 50×10-3 μm2. Moreover, the deeper the water depth, the less of the drilling depth below the mud line and the smaller of the formation-bottom hole pressure difference, the more effective of the riser monitoring technique. © 2019, Periodical Office of China University of Petroleum. All right reserved.

引用

页码：60 / 67

页数：7

共 16 条

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