摘要
分布式温度测试技术是水平井产气剖面测试的主体技术之一,由于页岩气入地液量大、压裂段数多,其微热效应受高水气比两相流、簇间干扰影响大,温降响应曲线规律复杂,导致解释结果 争议大。基于变水气比、双射孔簇入口设计,研制了水平管气水两相流温度分布模拟实验装置,共设置4类实验,开展不同气量、不同水量、不同射孔簇组合下的水平管温度分布模拟实验,研究产气量、含水率、簇间干扰对温降效应的影响。结果表明:对于纯气单簇流入,孔眼温降与气体流量呈线性正相关;对于气水两相单簇流入,孔眼温降与体积含水率呈二次函数负相关;当单簇气量低于25kg/h或体积含水率大于9%时,孔眼温降效应微弱,接近温度法产剖解释的极限工况;对于气水两相双簇流入,当产气和产水较高时,上下游孔眼温降相互干扰加剧,在实际产剖计算中需考虑该因素的影响。
Distributed temperature testing is one of the primary techniques used to evaluate gas productionprofiles for horizontal wells.Due to the large volume of shale gas entering the ground and the numerous frac-turing stages,its micro-thermal effect is significantly influenced by the two-phase flow characterized by ahigh water-gas ratio and inter-cluster interference.The characteristics of the temperature drop response curveare complex,leading to considerable controversy regarding the interpretation of results.Based on the design ofa variable water-gas ratio and dual perforation cluster inlet,a simulated experimental device has been devel-oped to study the temperature distribution of gas-water two-phase flow in a horizontal pipe.Four types of ex-periments have been conducted to examine the temperature distribution in the horizontal pipe under varyinggas volumes,water volumes,and combinations of perforation clusters,as well as to investigate the effects ofgas production,water cut,and inter-cluster interference on the temperature drop phenomenon.The results indi-cate that for the single-cluster inflow of pure gas,the temperature drop in the hole is linearly positivelycorrelated with the gas flow rate;for the single-cluster inflow of gas-water phases,the temperature drop inthe hole is quadratically negatively correlated with volumetric water cut.When the gas volume of a singlecluster is lower than 25kg/h or the volumetric water cut exceeds 9%,the temperature drop effect in the holeis weak,approaching the limit condition of the production profile interpreted by the temperature method;forthe gas-water two-phase dual cluster inflow,when both gas and water production are relatively high,the tem-perature drops of the upstream and downstream holes interfere with each other more.The influence of thisfactor needs to be considered in the actual production profile calculations.
作者
刘通
Liu Tong(Engineering'Technology Research Institute,SINOPEC Southwest Oil&Gas Company,Deyang Sichuan 618000)
出处
《中外能源》
2025年第5期48-53,共6页
Sino-Global Energy
基金
中国石化科技部技术开发项目“威荣深层页岩气开采关键技术研究”(编号:P23139)。
关键词
温度法产剖测试
温降效应
气水两相
产气量
含水率
射孔簇组合
production profile test by temperature method
temperature drop effect
gas-water two-phase
gasproduction
water cut
perforation cluster combination
