高气液比水平井临界携液流量预测新模型  

A new model for predicting critical fluid-carrying flow rate in horizontal wells with high gas-liquid ratio

作　　者：黄全华[1] 黄智程 杨亚涛 刘书炳 王定峰 颜学成 刘磊 HUANG Quanhua;HUANG Zhicheng;YANG Yatao;LIU Shubing;WANG Dingfeng;YAN Xuecheng;LIU Lei(Southwest Petroleum University,Chengdu 610500,China;Changbei Operating Company,Changqing Oilfield,PetroChina,Xi′an 710018,China)

机构地区：[1]西南石油大学,四川成都610500 [2]中国石油长庆油田长北作业分公司,陕西西安710018

出　　处：《断块油气田》2024年第5期843-850,共8页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金、石油化工联合基金资助项目“深层裂缝性异常高压气藏高速非达西渗流建模及非线性渗流特征研究”(U1762109)。

摘　　要：明确气井积液机理和携液规律对于掌握井下流体的流动状态至关重要。目前现场应用的临界携液流量模型较多,但是不同模型计算结果差异较大,Turner等模型计算的长北区块气井携液流量偏大,不利于指导生产。通过开展水平井流动模拟正交实验,捕捉典型流态,发现管斜角在45°~60°出现过渡流,通过编制流态识别程序进一步确定管斜角为46°时开始出现过渡流,此时携液最困难。基于液滴理论,引入井斜修正系数,建立了新的临界携液流量模型,新模型在长北区块气井中具有良好的适用性。新模型敏感性分析结果表明,由强到弱影响气井携液能力的因素依次为油管内径、井底流压、井斜角、井底温度。绘制的临界携液流量图版为后期开展停喷井治理措施的时机提供了依据。It is essential to understand the mechanism of fluid accumulation in gas wells and the fluid-carrying law to determine the state of fluid flow in the well.There are a number of critical fluid-carrying flow rate models applied in the field,but the calculation results vary considerably from model to model.The gas well fluid-carrying flow rates calculated using the Turner′s model and some other models for Changbei Block are larger than the actual values,which is not conducive to guiding production.Typical flow pattern are captured by conducting flow simulation orthogonal experiments in horizontal wells.Transitional flow is found to occur between the pipe slope angle of 45°and 60°.The flow pattern identification program further confirms that the transitional flow begins to occur at the pipe slope angle of 46°,which is the most difficult condition for carrying fluid.A new critical fluid-carrying flow rate model is established based on droplet theory,with the introduction of a well slope angle correction factor.The new model has good applicability in gas wells of Changbei Block.The results of sensitivity analysis of the new model show that the factors affecting the fluid-carrying capacity of gas wells are,in order from strong to weak,pipe diameter,bottomhole flowing pressure,well slope angle and bottomhole temperature.A critical fluid-carrying flow rate chart is produced to provide a basis for the timing of carrying out shut-in well management measures.

关 键 词：高气液比 水平井 积液机理 液滴模型 流态实验 临界携液流量 

分 类 号：TE37[石油与天然气工程—油气田开发工程]