注水地层的变形对套管损坏的影响  

Formation of Water Damage Deformation on the Impact of Casing

作　　者：杜永军[1] 杜良[2] 

机构地区：[1]大庆石油学院机械科学与工程学院,大庆163318 [2]大庆油田有限责任公司第一采油厂,大庆163000

出　　处：《科学技术与工程》2008年第23期6212-6217,共6页Science Technology and Engineering

摘　　要：油田在注水驱油过程中,高压注水改变了原有的地层压力的平衡,导致地层(或储层)应力场的改变和重新分布。本文首先建立了高压注水时地层渗流的流固耦合模型,然后针对某一特定注水地层进行变形分析。计算的结果表明,在高压注水时,地层在水平方向产生挤压变形,在竖向方向出现明显的张拉,整个地层会发生向上隆起的变形。而地层的这种变形恰恰是导致置于其中的油水井套管出现剪切和拉伸损坏的直接原因。Oilfield in the process of injection-production, high-pressure water injection has changed the original formation pressure balance, led to the stratum （or reservoir bed） stress change and redistribution. First mathematical model is established of fluid-structure interaction of stratum seepage flow in high-pressure water injection, and then water injection for a particular formation of a deformed. The results show that formation squeeze in a horizontal direction deformation, in the vertical direction of a clear tension and the formation will be happened upward uplift the deformation in high-pressure water placed casing different nature of casing injection. The formation of this deformation is precisely the result which the direct cause of damage.

关 键 词：建立 流固耦合模型 注水地层 变形分析 套管损坏 

分 类 号：TE313.1[石油与天然气工程—油气田开发工程]