|本期目录/Table of Contents|

[1]孟英峰,罗成波,李皋,等.气体钻井突发性井壁失稳动力演化机理及试验研究[J].中国安全生产科学技术,2015,11(5):64-69.[doi:10.11731/j.issn.1673-193x.2015.05.010]
　MENG Ying-feng,LUO Cheng-bo,LI Gao,et al.Dynamical evolution mechanism of sudden wellbore instability in nitrogen gas drilling and experimental research[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(5):64-69.[doi:10.11731/j.issn.1673-193x.2015.05.010]
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气体钻井突发性井壁失稳动力演化机理及试验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年5期
页码:
64-69
栏目:
学术论著
出版日期:
2015-05-30

文章信息/Info

Title:
Dynamical evolution mechanism of sudden wellbore instability in nitrogen gas drilling and experimental research
作者:
孟英峰;  罗成波;  李皋;  刘厚彬;  辜思曼
（西南石油大学油气藏地质及开发工程国家重点实验室, 四川 成都610500）
Author(s):
MENG Ying-feng; LUO Cheng-bo;  LI Gao;  LIU Hou-bin; GU Si-man
（State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation，Southwest Petroleum University， Chengdu Sichuan 610500，China）
关键词:
突发性井壁失稳; 地应力; 裂缝圈闭高压; 模拟试验
Keywords:
sudden wellbore instability;  ground stress;  fracture trap high pressure;  simulation experiment
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2015.05.010
文献标志码:
A
摘要:
从致密砂岩损伤破坏的角度出发，综合考虑致密砂岩的物理力学性质、地应力、裂缝圈闭高压等因素，在分析孔隙压力、地应力、裂缝圈闭高压在突发性井壁失稳过程中所起的作用基础上，将气体钻井突发性井壁失稳具有强烈时间效应的动态力学过程分为孕育、突变、井筒运移和终止4个阶段。对裂缝圈闭高压、地应力作用下致密砂岩的加速损伤演化引起的突发性井壁失稳机理进行了阐述，裂缝圈闭高压是突发性井壁失稳的主要动力源，地应力对突发性井壁失稳起辅助作用。通过模拟实验表明，受地应力破坏后的致密砂岩岩体在有裂缝情况下，卸压初始时刻释放的能量是无裂缝时的5~10倍，且该能量与动力学失稳密切相关。
Abstract:
Considering the damage and the physical mechanical properties of tight sandstone，ground stress，fracture trap high pressure，based on the analysis of the effective of pore pressure，ground stress and fracture trap high pressure in the sudden wellbore instability process， sudden wellbore instability is dynamic process with a strong time effect which is divided into four stages：preparation，catastrophe，wellbore movement and termination.The article describes the occurrence mechanism of sudden wellbore instability that caused by the accelerate damage evolution of tight sandstone because of the fracture trap high pressure and ground stress.the fracture trap high pressure is the main power source，the ground stress only plays a supporting role in the sudden wellbore instability. The experiments show that release energy at the initial moment is 5~10 times when no crack in the core after the destruction of the tight sandstone，and the energy are closely related to dynamic instability.

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备注/Memo

备注/Memo:
国家自然科学基金重点项目（51134004）；国家科技重大专项课题项目（2011ZX05022-005）
更新日期/Last Update: 2015-05-30