Investigation on the propagation characteristics of pressure wave during managed pressure drilling

被引:0
|
作者
Hou, Yanan [1 ]
Li, Zhong [1 ]
Yin, Zhiming [1 ]
Fan, Baitao [2 ]
Ma, Yingwen [1 ]
Yang, Xiangqian [1 ]
Tian, Deqiang [1 ]
Cai, Wenjun [1 ]
Ren, Meipeng [1 ]
Zhang, Xingquan [1 ]
机构
[1] CNOOC Res Inst Ltd, Beijing, Peoples R China
[2] CNOOC China Ltd, Beijing, Peoples R China
来源
基金
中国博士后科学基金;
关键词
managed pressure drilling; wellbore flow; gas liquid flow; pressure wave; propagation characteristic; LIQUID; ATTENUATION; SIMULATION; BEHAVIOR;
D O I
10.3389/fenrg.2024.1364791
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The small difference between formation pressure and fracture pressure in offshore oil and gas reservoirs poses a huge challenge to drilling. Managed pressure drilling (MPD) technology, as a drilling technique that can accurately control bottomhole pressure, is an effective technique to solve this challenge. In MPD technology, the pressure wave propagation behavior and mechanism in the wellbore induced by wellhead backpressure are crucial for parameter design and efficient application. In this paper, pressure wave propagation characteristics and mechanism in gas-liquid flow were investigated with a new proposed pressure wave velocity model that considers inter-phase mass transfer effect. This new model and its solution algorithm were verified with experimental data in literature. The influence of gas invasion stage, drilling fluid type, drilling fluid density and backpressure on pressure wave propagation characteristics were investigated. Results show that the time for pressure wave induced by wellhead backpressure in the wellbore cannot be ignored in the design of the backpressure value during MPD. This propagation time increases with occurrence of gas invasion. Moreover, the propagation time in water-based drilling fluid is longer than that in oil-based drilling fluid, which is because the interphase mass transfer between invaded gas and oil-based drilling fluid. The influence mechanism of high drilling fluid density and wellhead backpressure on pressure wave propagation characteristics is due to the suppression of gas invasion process. These findings could be used as guides in parameters design and optimization in MPD.
引用
收藏
页数:15
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