致密气藏水平井速度管下入时间确定方法  

Method to determine time of installing velocity string for horizontal well in tight gas reservoirs

作　　者：吴武超[1] 李治平[1] 赖枫鹏[1] 任广磊[2] 赵钊[1] 

机构地区：[1]中国地质大学(北京)非常规天然气能源地质评价与开发工程北京市重点实验室,能源学院,北京100083 [2]中国石化华北分公司勘探开发研究院,河南郑州450006

出　　处：《断块油气田》2015年第4期522-525,共4页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项课题“中西部地区碎屑岩储层预测、保护与改造技术”(2011ZX05002-005)

摘　　要：致密气藏水平井具有低产、低压、井底容易积液等特点,从而易造成气井水淹。为了解决积液问题,目前一般采取在水平井中安装速度管的措施。根据致密气藏水平井的特点,从水平井积液的角度研究了速度管下入时间的确定方法。结合现场实践认为,水平井的造斜段最易积液,提出了根据生产动态数据和造斜段井筒携液模型耦合计算速度管下入时间的方法;并以华北DND致密气藏为例,进行了33口井的计算和实施。生产效果评价结果表明,33口井中有21口井生产效果好。根据21口井实例分析,19口井的计算结果能够保证更好的生产效果。Horizontal well in tight gas reservoirs has low yield, low pressure, easily water accumulation, which can causes flooding and other issues. In order to solve water accumulation, velocity string in horizontal well is installed. According to the characteristics of horizontal well in tight gas reservoirs, time of installing velocity string in horizontal well has been studied. Water accumulation mostly happens in the curve section, this method is built on the dynamic production data and the liquid carrying model for curve section. In application, 33 wells in North DND tight gas reservoirs were calculated and implemented, the evaluation results show that the 21 wells are effective in the studied 33 wells. Analyzing the 21 wells, the calculations of 19 wells ensure better production.

关 键 词：水平井 致密气藏 速度管 天然气流速 临界携液流量 

分 类 号：TE375[石油与天然气工程—油气田开发工程]