摘要
为了解决出砂气藏水平井存在的筛管冲蚀问题,针对常用的多层滤网复合精密筛管,利用创新研制的水平井筒封闭空间筛管冲蚀模拟系统,开展了筛管冲蚀损坏机理及规律实验。实验结果表明,气体携砂条件下的多层金属滤网复合筛管冲蚀破坏分为保护罩正面啃噬以及侧向滤网冲蚀损坏2种机理。交错冲缝式的外保护罩正面抗冲蚀能力较强,但侧向抗冲蚀能力极弱。筛管金属滤网介质的冲蚀损坏速度约是外保护罩的2~3倍。另外,基于冲蚀机理提出了新型双层弧形交错互补冲缝的结构,研究构建了非均质气藏水平井高冲蚀风险位置识别方法,以及分级、分段提高全井段管柱抗冲蚀能力的优化设计。新型高抗冲蚀能力外保护罩在兼顾经济性的同时,为出砂气藏水平井的防砂管柱冲蚀问题提供了可靠易行的解决方案,一定程度上提升了天然气藏防砂管柱的服务期限和开发效果。
To solve the screen erosion problem of horizontal wells in sand producing gas reservoirs,this paper took the commonly used composite precision screen with multi-layer mesh filter as the research object to carry out experimental study on screen erosion damage mechanism and law through gas carrying sand by using the innovatively developed simulation experimental system of screen erosion in closed space of horizontal well.The experimental results show that the erosion damage of the composite screen with multi-layer metal filter under the condition of gas carrying sand include two mechanisms,i.e.,gnawing of frontal protective cover and erosion damage of side filter.The outer protective cover of staggered punching and sewing type has stronger erosion resistance in the front side,but extremely weak one in the lateral side.The erosion damage velocity of the medium at the metal filter is about 2-3 times that at the outer protective cover.In addition,a new structure of two-layer arc like,staggered and complementary punching and sewing type was put forward based on erosion mechanism,and a method for identifying the high erosion risk positions of horizontal wells in heterogeneous gas reservoirs and an optimization design method to improve the erosion resistance of the whole string by hierarchy and stage were researched and constructed.The new outer protective cover with high erosion resistance and the hierarchical and staged design method provide a simple and easy solution for the erosion damage of sand control completion string of horizontal well in high-yield sand producing gas reservoirs while giving consideration to the economics,which can improve the service life and development effect of sand control completion string in gas reservoirs to some extent.
作者
董长银
王肇峰
周博
黄亮
邓君宇
方达科
DONG Changyin;WANG Zhaofeng;ZHOU Bo;HUANG Liang;DENG Junyu;FANG Dake(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;Key Laboratory of Unconventional Oil and Gas Development of Ministry of Education,Qingdao 266580,Shandong,China;CNOOC China Limited Zhanjiang Company,Zhanjiang 524057,Guangdong,China;CNPC Engineering Technology R&D Company limited,Tianjin 300450,China)
出处
《石油钻采工艺》
CAS
北大核心
2021年第6期762-771,共10页
Oil Drilling & Production Technology
基金
国家自然科学基金“非均质疏松砂岩储层水平井砂液(水)协同产出剖面动态演化机制及模拟”(编号:52074331)
中海石油(中国)有限公司重大科研项目“莺琼盆地高温高压完井和测试关键技术研究”(编号:CNOOC-KJ 135ZDXM24LTDZJ03)
中国石油重大专项“海域天然气水合物试采工程基础及关键技术”(编号:ZD2019-184)。
关键词
出砂气藏
防砂筛管
冲蚀实验
冲蚀损坏机理
外保护罩结构设计
高抗冲蚀筛管
sand producing gas reservoir
sand control screen
erosion experiment
erosion damage mechanism
structural design of outer protective cover
high erosion resistance screen
