第38参第6期 2016年11月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2016)060887-06
DOI: 10.13639/j.odpt.2016.06.033
Vol. 38 No. 6 Nov.2016
砂泥岩夹层套管损坏的有限元分析及防控措施
练章华罗泽利于浩，步宏光？李才雄”李长平3
1.西南石油大学油气藏地质及开发工程国家重点实验宝；2大潘沟田公司采沟工艺研究院；3大港油田公司采油三厂
弓用格式：殊章华，罗泽利，予浩，步宏光，季才雄，李长平，砂泥岩失层套管损坏的有限无分新及防控错施J」.石油钻采工艺,2016,38(6):887-892
摘要：据大港油田不完全统计，在沙泥岩类层的套管损坏占63%。针对在砂泥岩失层套管损环严重的问题，基于弹塑性力学和断裂力学理论，建立了沙岩一泥岩一沙岩三券层剖面的轴对称有眼元模型，并借助有限元软件进行求解，分析不同钢材和壁厚条件下三岩层剖面上套管内应力分布情况。结果显示，管内的VonMises应力在砂泥岩界面和泥岩段应力最大，且在砂泥界面应力发生突变出现尖角，因此在砂泥岩界面和混常投奏管容易损坏。针对砂泥岩类层研究了泥岩段套管损坏的防控措施，研究发现，相同钢级下，增加套管壁厚不能有效防控泥券段套管损环，提高套管的钢级才是有效方法。通过以上分析研究对砂泥岩界面防控套管损坏的研究提供技术借鉴。
关键词：砂泥岩夹层；套管损坏；有限元方法；防控措施
中图分类号：TE931.2
文献标识码：A
Finite element analysis and control measures on casing failure in sand shale interbeds
LIAN Zhanghua',LUO Zeli',YU Hao,BU Hongguang,LI Caixiong,LI Changping
1. Stale Key Laboralory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleam University, Chengdar 610500, Sicharan, China
2. Oi/ Production Technology Research Jnsfitarte, PefroChina Dagang Oilfield Company, Tianjin 300280, China
3. No.3 Oil Prodarction Plant, PetroChina Dagang Oilfield Compay, Cangzhou 061035, Hebei, Chind
Citation: LIAN Zhanghua, LUO Zeli, YU Hao, BU Hongguang, LI Caixiong, LI Changping. Finite element analysis and control(see
Abstract: According to the incomplete statistics of Dagang Oilfield, the casing failure in sand shale interbeds accounts for 63%. To solve this problem, an axisymmetric finite element model was established for sandstone-shale-sandstone three-layer section according to the theories of plasto elasticity and fracturing mechanics. Then, it was solved by means of the finite element software to analyze the stress distribution inside the casing on the three-layer section by varying steel grade and wall thickness. It is indicated that the Von Mises stress inside the casing is the highest at sandstone-shale interface and shale interval, and the stress changes abruptly at sandstone-shale inter-face, resulting in sharp edges, so the casing at sandstone-shale interface and shale interval gets failed easily. Based on the characteristics of sand shale interbeds, the control measures on casing failure in shale interval were analyzed. And it is shown that the casing failure in shale interval can't be controlled effectively by thickening the casing wall if the steel grade is kept the same. And the effective way is to increase the steel grade. This paper provides the beneficial reference for the study on casing failure control at sandstone-shale interface
Key words: sand shale interbed; casing failure; finite element method; control measures
基金项目：国家白然科学基金“械端条件下气并油套管端力学杆为及其螺线密封机理研究"（编号：51574198)；国家教育部博士点基金
项月“基于XFEM和知现力季的超深并钻工具或势破坏机理研究”（编号：20135121110005）
第一作者：练章华（1964-)，1994年毕业于西南石油季院机械工程专业，获博士学位，现从事CAD/CAE/CFD、套管损坏机理、管柱力季及
射孔完并等教学与科研工作，教投、博士，博士生乎师，通试地址：（610500)四川省成都事新都区。电话；028-83032210。E-mail: cwetlzh@swpu.edu.cn
通讯作者：多泽利（1988-),2015年毕业于重庆科技学统石沟与天然气工程系，西南石油大学硕士在读研究生，主要研究油气并固并与究
并技术。E-mail: 793609127@qq.com
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