摘要：In this paper, the mechanical characteristics of a multilayer cemented casing system in directional well under anisotropic formation have been presented to investigate the collapse resistance of casing under non-uniform in-situ stress. The model has considered the deviation angle, azimuth angle and the formation transverse anisotropy simultaneously. During analysis, the original in-situ stress tensor has been transformed into three stress tensors through the conversion of coordinate and stress decomposition based on the elastic mechanics. The formation mechanical parameters (Young's modulus and Poisson's ratio) have been taken as a function of wellbore circumferential angle during analysis procedure. In addition, a simplified model has been analyzed to verify the correctness of the method proposed in this paper. Subsequently, the stress distributions of the system have been obtained through solving the governing equations. On this basis, the influences of geometric parameters and mechanical parameters on the casing collapse resistance have been discussed to acquire a comprehensive understanding of this problem. Finally, some significant conclusions have been drawn based on the discussion mentioned above. (C) 2015 Elsevier B.V. All rights reserved.

关键字：Multilayer cemented casing Collapse resistance Directional well Anisotropic formation

ISSN号：1875-5100

卷、期、页：卷: 26 页: 409-418

发表日期：2015-09-01

影响因子：2.718000

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）

发表期刊名称：JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING

第一作者：房军,王宴滨,高德利

论文类型：期刊论文

论文概要：房军,王宴滨,高德利，On the collapse resistance of multilayer cemented casing in directional well under anisotropic formation，JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING，2015，卷: 26 页: 409-418

论文题目：On the collapse resistance of multilayer cemented casing in directional well under anisotropic formation