辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(5)：513-519,7.DOI:10.11956/j.issn.1008-0562.20240420
煤层气井水平段气泡流时液相滞留效应及轨迹优化
Retention effects and trajectory optimization design of fluids in coalbed methane horizontal well sections under bubble flow regime
摘要
Abstract
Aiming at the problems of unclear flow field distribution characteristics in the wellbore during the bubble flow stage of the coalbed methane horizontal well section and unknown influence of the liquid retention effect,COMSOL Multiphysics software was applied to simulate the flow field distribution under four kinds of trajectory patterns of the horizontal section during the bubble flow state.This study analyzed the influence of the bubbles on the liquid flow under different conditions such as trajectory pattern of the horizontal well section and inclination angle,and optimized the trajectory of borehole of the horizontal section of the coalbed methane wells.The results show that with the increase of dip angle,the stagnation effect of bubbles on liquid is the largest in bow-type wells,followed by spoon-type wells and upward-dipping wells,and the influence of downward-dipping wells is the smallest.When the upward inclination angle of the coal seam is 8°-25°,the upward inclination type wellbore trajectory of 3°-7° is preferred;when the upward inclination angle of the coal seam is 0°-8°,the upward inclination type wellbore trajectory of 1°-4° is preferred;when the downward inclination angle of the coal seam is 0°-8°,the downward inclination type wellbore trajectory of 1°-4° is preferred.The research conclusions provide theoretical guidance for the optimal design of horizontal well section trajectories for coalbed methane.关键词
水平井段/气泡流/水平井井型/倾俯角/井眼轨迹/滞留效应/流场分布Key words
horizontal well section/bubble flow/horizontal well type/dip angle/wellbore trajectory/retention effect/flow field distribution分类
能源科技引用本文复制引用
倪小明,赵彦伟,李俊峰,闫晋,郭盛强..煤层气井水平段气泡流时液相滞留效应及轨迹优化[J].辽宁工程技术大学学报（自然科学版）,2025,44(5):513-519,7.基金项目
国家自然科学基金项目(42372198) （42372198）
山西省科技重大专项计划"揭榜挂帅"项目(202101080301014) （202101080301014）
