井眼在软沉积岩和盐岩蠕变的解析解推导  

Analytical Solutions of Borehole Creep in Soft Sedimentary Rock and Salt Rock

作　　者：杨航[1] 

机构地区：[1]长江大学(武汉校区)石油工程学院,湖北武汉430100

出　　处：《广东化工》2014年第21期23-24,共2页Guangdong Chemical Industry

摘　　要：随着勘探开发的不断深入,钻遇复杂地层的可能性越来越大。尤其是软泥岩和盐岩,这些地层的倾向蠕变可引起卡钻、高扭矩崩塌、套管损坏和套管挤毁等复杂情况,这些问题都可以显着增加钻井、固井和生产成本。文章根据Perzyna粘塑性理论,推导出井眼应力和蠕变率的关系,对实现安全钻井和经济钻井具有重要的指导意义,但其适用领域有待进一步验证。As the exploration and extraction goes deeper, the possibility of drilling complex formation is growing. Especially soft mudstone and salt rock, the tendencies creep of these formation can cause sticking, high torque collapse, casing collapse, casing damage and other complex cases, which will increased costs of drilling, cementing and production significantly. According to Perzyna viscoplastic theory, the paper derived the relations between borehole stress and creep rate. Besides, it has important guiding significance for achieving safe and economic drilling. However, the field of application need to be further verified.

关 键 词：井眼蠕变 井眼闭合 弹粘塑性 

分 类 号：TE243[石油与天然气工程—油气井工程]