产水气井最小携液配产确定方法  

Determination Method of Minimum Liquid-carrying Production Allocation for Water-producing Gas Wells

作　　者：彭川 蒋延明 PENG Chuan;JIANG Yanming(China United Coalbed Methane Co.,LTD.,Beijing 100015,China;China National Oil and Gas Exploration and Development Corporation,Beijing 100015,China)

机构地区：[1]中联煤层气有限责任公司,北京100015 [2]中国石油国际勘探开发有限公司,北京100015

出　　处：《科技和产业》2024年第11期224-228,共5页Science Technology and Industry

摘　　要：产水气井通常采用“高产低配,低产高配”的思路,采用无阻流量的经验配产比例来确定气井生产制度。为提高产水气井携液能力和减少排水采气成本,建立定量化确定气井最小携液配产的方法,论证不同配产制度下产气量和井筒临界携液产量变化规律,在神府气田取得较好应用效果。研究结果表明:可以根据区块的地层压力、经验系数α以及管柱尺寸建立区块最小携液配产方程,通过数值求解,得到不同管柱下携液配产或配产比例图版;在较低无阻时最小携液配产比例较高,且变化较快,而非单一的经验配产比例;最小携液配产受到管柱尺寸、试气无阻和地层压力的影响较大,而受到区块α值的影响较小。建立的最小携液配产方法可以有效减少气井投产初期井筒积液的发生,对产水气井合理配产、管柱优化和生产动态分析具有一定指导作用。Water-producing gas wells usually adopt the idea of high production and low allocation,low production and high allocation,and use the empirical production allocating of non-resistance flow rate to determine the production system of gas wells.In order to improve the ability to liquid-carrying of water-producing gas wells and reduce the cost of drainage gas production,a quantitative method for determining the minimum liquid-carrying production allocation was established,and the variation law of gas production and wellbore critical liquid-carrying production under different production allocation systems was demonstrated,which achieved good application results in Shenfu gas field.The results show that according to the formation pressure,αcoefficient of the block and string size,the minimum liquid-carrying production equation of the block can be established.Through numerical solution,the liquid-carrying production under different string or the allocation ratio chart considering liquid-carrying can be obtained.The minimum liquid-carrying production allocating ratio is higher and changes rapidly at lower non-resistance flow rate conditions,rather than the proportion of single experience allocation ratio.The minimum liquid-carrying production allocation is greatly affected by the size of the string,the non-resistance flow rate and the formation pressure,and it is less affected by a coefficient.It is concluded that the established minimum liquid-carrying production allocation method can effectively reduce the occurrence of wellbore effusion in the early stage of gas well production,which has a certain guiding role in the rational production allocation,string optimization and production performance analysis of water-producing gas wells.

关 键 词：产水气井 携液配产 排水采气 管柱优化 定量化 

分 类 号：TE348[石油与天然气工程—油气田开发工程]