水平井井筒与气藏流动耦合数值模拟研究

水平井技术不断发展与成熟,已经成为动用地质储量行之有效的方法,并逐渐在气藏的开发中广泛应用。随着水平井研究的不断深入,有大量学者认为,水平井井筒流动与直井有着明显区别。水平井水平段的流动是变质量流动,井筒与储层之间存在流动耦合。在水平井产能设计中不能忽略井筒损失的影响。近年来数值模拟技术不断完善,主流模拟软件已经推出模拟结果的三维显示功能。利用数值模拟软件,研究水平井井筒与储层的流动耦合,使理论公式计算与研究成果展示结合起来,能够更直观地认识渗流规律。主要应用Eclipse软件中的多段井模拟技术,以实际区块的水平井数据为基础,研究井筒损失对水平井的影响以及井筒与气藏的流动耦合规律,认为水平井井筒的紊流是影响水平井产能的主要因素,投产初期控制产气量,维持较低的生产压差,可以延长无水采气期,提高开采效果。

Numerical Simulation Study on coupling horizontal wellbore flow in gas reservoir

Horizontal well technology is widely used in reservoir exploitation.Many scholars considers flowing in horizontal wellbore is variable mass flow.There is coupling flow between wellbore and reservoir.With the constant perfection and development of numerical simulation,most software can show simulation result in 3D viewer.Formula combined with research results can be used for analysis seepage law.Basing on horizontal well date in an actual oil field,research wellbore loss effect and coupling horizontal wellbore flow in gas reservoir using multi-segment wells in ECLIPSE software.Turbulent in wellbore is main factor which affects horizontal well productivity.Keeping lower producing pressure drop can prolong gas-free production period and improve production effect.