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[1]曹文科,邓金根,谭强,等.深水钻井热交换作用下的井壁稳定性分析[J].中国安全生产科学技术,2017,13(6):53-57.[doi:10.11731/j.issn.1673-193x.2017.06.008]
　CAO Wenke,DENG Jingen,TAN Qiang,et al.Analysis on stability of borehole under the effect of heat exchange in deepwater drilling[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(6):53-57.[doi:10.11731/j.issn.1673-193x.2017.06.008]
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深水钻井热交换作用下的井壁稳定性分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年6期
页码:
53-57
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-06-30

文章信息/Info

Title:
Analysis on stability of borehole under the effect of heat exchange in deepwater drilling
文章编号:
1673-193X(2017)-06-0053-05
作者:
曹文科1; 邓金根1; 谭强1; 刘伟1; 李扬1; 靳从升2; 任国庆2; 郭晓亮2
1.中国石油大学北京 油气资源与工程国家重点实验室，北京 102249； 2.中国石油集团海洋工程有限公司 钻井事业部，天津 300000
Author(s):
CAO Wenke1;  DENG Jingen1;  TAN Qiang1;  LIU Wei1;  LI Yang1;  JIN Congsheng2;  REN Guoqing2;  GUO Xiaoliang2
1. State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum Beijing, Beijing 102249, China; 2. Drilling Department, Offshore Engineering Company Limited of CNPC, Tianjin 300000, China
关键词:
深水; 温度; 应力; 坍塌压力; 破裂压力
Keywords:
deepwater;  temperature;  stress;  collapse pressure;  fracture pressure
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2017.06.008
文献标志码:
A
摘要:
为了研究深水钻井过程中热交换作用对井壁稳定性的影响规律，建立了钻井液、钻柱、海水和地层各介质热交换作用下温度控制方程，根据热弹性理论计算温度变化对井周应力的影响，结合地层强度准则与拉伸破坏准则确定深水井壁坍塌压力与破裂压力。结果表明，钻井液循环对地层产生的冷却作用能够降低井壁坍塌压力与破裂压力，但破裂压力降低幅度比坍塌压力的降低幅度稍大。因此，尽管钻井液的冷却效果能够抑制井壁坍塌，但应注意低温度的井壁更易形成诱导缝，甚至引发地层漏失。计算结果对深水钻井作业具有指导意义。
Abstract:
In order to study the influence of heat exchange on the stability of borehole in the process of deepwater drilling, the temperature control equations of various mediums, including the drilling fluid, drill pipe, sea water and formation, under the effect of heat exchange were set up. The influence of temperature change on the stress around wellbore was calculated according to the thermal elastic theory, and the collapse pressure and fracture pressure of deepwater borehole were determined combining with the formation strength criterion and tensile failure criterion. The results showed that the cooling effect of drilling fluid circulation on the formation can reduce the collapse pressure and fracture pressure of borehole, but the reduction extent of fracture pressure is slightly larger than that of collapse pressure. Thus, although the cooling effect of drilling fluid can inhibit the borehole collapse, it should be noticed that the induced fractures happen easily on the borehole with low temperature, even cause the formation leakage. The results have a guiding significance for the deepwater drilling operation.

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备注/Memo

备注/Memo:
973计划项目（2015CB251202）；国家自然科学基金项目(11502304)；中国石油大学（北京）人才引进项目(2462013YJRC023)；青年创新团队项目(C201601)
更新日期/Last Update: 2017-07-11