不渗透岩性边界对苏里格气田开发效果的影响  

Influence of impermeable lithologic boundary on development effect of Sulig gas reservoir

作　　者：陈姣妮[1] 李天太[2] 李文鹏[3] 刘军令 叶小闯[3] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]西安石油大学石油工程学院,陕西西安710065 [3]长庆油田公司第三采气厂,内蒙古乌审旗017300 [4]中原油田普光分公司,四川达州635002

出　　处：《西安石油大学学报（自然科学版）》2015年第6期62-66,9-10,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金"基于采动影响条件下煤层气数值模拟方法研究"(编号:51404196)

摘　　要：为了探明不渗透岩性边界是否为苏里格气田开发早期气井产量下降快且稳产期短的原因,应用数值模拟方法研究直井存在不渗透岩性边界时的开发效果;利用非结构网格加密技术建立水平井压裂模型,研究存在不渗透岩性边界时水平气井的开发效果。结果表明,不论直井还是水平井,模拟的开发效果均与实际情况相符,证明储层存在不渗透岩性边界是开发早期气井产量迅速下降、稳产期短的原因;间歇开井的工作制度能有效减缓气井产量递减速度。To verify whether the impermeable lithological boundary is the cause resulting in the quick production decline and the short stable production period of gas wells in the early development of Sulige gas field,the development effect of the vertical well with impermeable lithologic boundary is studied through numerical simulation method. The fracturing horizontal well model is established by means of PEBI unstructured grid encryption technology,and the development effect of the fracturing horizontal well with impermeable lithologic boundary is studied. The results show that regardless of vertical well or horizontal well,the simulation development results are in line with their actual situation,which verifies the existence of impermeable lithologic boundary is indeed the cause resulting in the quick production decline and the short stable production period of gas wells in the early development of Sulige gas field. Therefore,the intermittent working system of the gas wells in Sulige gas field can effectively slow down the production decline rate of the gas wells.

关 键 词：不渗透岩性边界 压裂水平井 开发效果 数值模拟 非结构网格 苏里格气田 

分 类 号：TE332[石油与天然气工程—油气田开发工程]