基于FLUENT积液气井流动规律及测井资料解释方法  

Flow patterns and well logging interpretation methods for liquid-accumulated gas wells based on FLUENT

作　　者：秦昊 陈文安 秦民君 王青川 王燕 付艳双 QIN Hao;CHEN Wenan;QIN Minjun;WANG Qingchuan;WANG Yan;FU Yanshuang(Geological Research Institute of CNLC,Xi′an,Shaanxi 710077,China;Research Institute of Exploration&Development of Qinghai Oilfield,Dunhuang,Gansu 736202,China)

机构地区：[1]中国石油集团测井有限公司地质研究院,陕西西安710077 [2]中国石油集团青海油田勘探开发研究院,甘肃敦煌736202

出　　处：《油气井测试》2024年第5期42-50,共9页Well Testing

基　　金：中国石油集团测井有限公司科学研究与技术开发项目“老油田挖潜稳产测井综合评价技术研究”(CNLC2022-8B04)。

摘　　要：常规气液两相流动规律及产出剖面测井资料解释模型难以精确评价积液气井井下流体生产动态。结合数值模拟及实验,研究了积液高度、入口气量及气液配比对气液两相流体流动特征的影响规律,分析了单相气及气-液两相流动特征参数之间关系,建立了积液气井气相速度预测模型,并结合物理实验进行验证。研究表明,积液高度小于10 m,气量小于200 m^(3)/d时积液段混合流体流型为泡状流;单相气井在积液段持气率受含气量影响,积液高度影响并不明显,持气率可计算气相表观速度;积液段气液两相漂流模型相分布系数受入口流量和持水率影响,入口流量越低,相分布系数越小,定系数漂流模型不能准确预测各相流体速度,必须结合实际生产特征对模型进行优化。该研究为低产积液气井产液剖面测井资料解释方法研究提供了技术支撑。Conventional gas-liquid two-phase flow patterns and production profile logging interpretation models are insufficient for accurately evaluating the production dynamics of liquid-accumulated gas wells.By integrating numerical simulations and experiments,the influence of liquid accumulation height,gas inflow rate,and gas-liquid ratio on the flow characteristics of two-phase fluids were investigated.Furthermore,the relationship between the characteristic parameters of single-phase gas flow and gas-liquid two-phase flow were analyzed.A prediction model for gas phase velocity in liquid-accumulated gas wells was established,which was validated through physical experiments.The research show that when the liquid accumulation height is less than 10 m and the gas inflow rate is less than 200 m^(3)/d,the flow regime of the mixed fluid in the liquid-accumulated section is bubbly flow;in single-phase gas wells,the gas content influences the gas holdup,which can be used to calculate the apparent velocity of the gas phase,in the liquid-accumulated section,while the liquid accumulation height has little effect;in gas-liquid two-phase flow,the drift flow model′s phase distribution coefficient is affected by inflow rate and water holdup—the lower the inflow rate,the smaller the phase distribution coefficient,and fixed-coefficient drift flow model cannot accurately predict the velocity of each phase and must be optimized based on actual production characteristics.This research provides technical support for developing production profile logging interpretation methods for low-production,liquid-accumulated gas wells.

关 键 词：产出剖面 积液气井 测井资料 数值模拟 气相速度 解释模型 持率 实验研究 

分 类 号：TE37[石油与天然气工程—油气田开发工程]