石油勘探与开发2011，Vol.38Issue(5)：589-593,5.
砂岩储集层酸化后试油井壁稳定性模型
Stability model of borehole wall during the well test after acidizing treatment of sandstone reservoirs
摘要
Abstract
In the DB Block, Tarim, wellbores collapsed during well test after sandstone matrix acidizing. Aimed at this issue, the parameter variation rule of rock mechanics are studied through experiments. The models of mechanics parameters during acidizing are established. The stress distribution around wellbore with acid treatment is described taking plastic zone into consideration. The evaluation method of wellbore stability with acid treatment is established. The research indicates that, the acidizing treatment would bring into changes in Young's modulus, Poisson's ratio, cohesion and internal friction angle. During the acidizing, the change of Young's modulus and Poisson's ratio can be worked out through variation of porosity. Decrease of cohesion and internal friction angle can be fitted through experimental data. The acidizing treatment could lead to stress decrease, which is determined by acidizing time and effective acidizing radius. The wellbore stability is determined by the decreased stress and rock strength. In general, the effect of acidizing treatment at an earlier period on wellbore stability is greater than that at a later period.关键词
试油/基质酸化/砂岩/井壁稳定性/岩石力学参数Key words
oil test/ matrix acidization/ sandstone/ borehole wall stability/ rock mechanics parameter分类
能源科技引用本文复制引用
邱康,陈勉,金衍,张福祥..砂岩储集层酸化后试油井壁稳定性模型[J].石油勘探与开发,2011,38(5):589-593,5.基金项目
国家重点基础研究发展规划(973)项目(2010CB226701) （973）
教育部新世纪优秀人才支持计划(NCET-08-0840) （NCET-08-0840）
