套损后注水井浅层高压区预测  

Prediction of shallow high-pressure region for injection well after casing damage

作　　者：李士斌[1] 任伟[1] 张立刚[1] 才庆[2] 王运涛[2] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石油大庆油田有限责任公司采油工程研究院,黑龙江大庆163000

出　　处：《断块油气田》2013年第4期492-494,共3页Fault-Block Oil & Gas Field

摘　　要：注入水沿套损部位进入地层,在井壁附近易形成一个异常高压区。异常高压区一旦形成,对后续钻井会造成极大危害。文中在分析浅层高压区形成机理及危害的基础上,利用有限元模拟技术进行计算模拟,预测独立砂体、断层遮挡2种类型高压区的范围和压力大小随时间变化情况,并分析钻关井泄压方法的效果,在南二区高173-152井区、西二断块高429-27井区、杏12区3个区进行实际应用发现,预测结果与实际应用符合率达85%以上,泄压后固井优质率达78.4%,经济效益较好。Injected water into formation along the position damaged by casing will form an abnormal high-pressure region,which is harmful for the subsequent drilling.Based on fully analysis of the formation mechanism and harm about abnormal high-pressure region and using finite element simulation techniques,this paper predicts the pressure change of abnormal high-pressure region with time for individual sand body and fault screened,and analyzes the effect of pressure relief.Applications in South 2 Gao 173-152,West 2 Fault Block Gao 429-27 and Xing 12 well areas show that the coincidence rate is more than 85% and the cementing perfection rate is 78.4%,getting significant economic benefits.

关 键 词：注水井 套管损坏 独立砂体 断层 泄压 

分 类 号：TE38[石油与天然气工程—油气田开发工程]