致密砂岩有水气藏氮气钻井井筒流动模型与现场应用  

Wellbore Flow Model and Field Application of Nitrogen Drilling in Tight Sandstone Gas Reservoir with Water

作　　者：肖东 刘亚川 靖润昌 李皋 何龙[3] 肖洪宇[1,2] XIAO Dong;LIU Ya-chuan;JING Run-chang;LI Gao;HE Long;XIAO Hong-yu(Petroleum Engineering School,Southwest Pertroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Sinopec Southwest Oil and Gas Company,Chengdu 610000,China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [3]中国石化西南油气分公司,成都610000

出　　处：《科学技术与工程》2024年第36期15427-15436,共10页Science Technology and Engineering

基　　金：国家重点研发计划(2023YFB3210205);四川省重点研发计划(2023YFS0358)。

摘　　要：氮气钻井因其独特优势,成为开发致密砂岩气藏有效的方式之一。钻井中地层出水风险,会限制氮气钻井技术的规模化应用,因此,如何准确预测或监测地层出水,成为氮气钻井发展的“卡脖子”技术。综合考虑地层产气与出水,耦合井筒压力场、温度场,建立全井筒相对湿度分布模型并进行数值求解,结合氮气钻井随钻监测系统,实现对井下压力、温度及湿度等重点参数快速定量评价。在川西DY105井须家河组氮气钻井施工中对地层出水工况进行判断,指导现场施工。所建相对湿度分布模型对保障致密砂岩有水气藏储层氮气钻井安全施工具有重要意义。Nitrogen drilling is one of the effective ways to develop tight sandstone gas reservoir because of its unique advantages.The risk of formation water production in drilling will limit the large-scale application of nitrogen drilling technology,so how to accurately predict or monitor formation water production has become a“choke”technology in the development of nitrogen drilling.Comprehensively considering gas production and water production,coupled with wellbore pressure field and temperature field,the model of relative humidity distribution in the whole wellbore was established and numerically solved,it realized the fast quantitative evaluation of key parameters such as downhole pressure,temperature and humidity.During nitrogen drilling in DY105 well of Xujiahe in western Sichuan,the water-out condition of formation was judged to guide on-site construction.The established relative humidity distribution mode is of great significance to ensure the safe operation of nitrogen drilling in tight sandstone water-bearing gas reservoir.

关 键 词：致密砂岩气藏 氮气钻井 地层出水量 随钻监测 相对湿度 

分 类 号：TE28[石油与天然气工程—油气井工程]