2016年12月第35卷第6期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10.3969/J.ISSN.1000-3754.2016.06.018
井下涡流排液采气井筒临界携液量计算周朝’吴晓东’汤敬飞岑学齐12曹孟京钟子尧（1.中国石油大学石油工程学院，北京102249；2.中国石化石油勘探开发研究院，北京100083）
Dee.，2016 Vol.35 No. 6
摘要：井下涡流排液采气是一项新技术，目前缺乏对井简涡流场临界携液流量的理论研究。根据两相流体动力学理论，对井简涡流场中的液滴进行受力分析，得到液滴沿轴向和径向的运动方程，然后通过量级比较，忽略虚拟质量力和Basset力，建立简化的液滴垂向受力平衡方程，推导出涡流场临界携液流速与流量公式。现场实例分析表明：理论计算的涡流场临界携液流量比常规流场的临界携液流量平均降低26.4%；随着螺旋角增大，临界携液流量先增大后减小，存在一个使临界携液流量最小的螺旋角。井下涡流排液技术可使临界携液流量大幅降低，有效提高气并携液能力，排除并简积液。
关键调：井下；涡流：排液采气；气井；受力分析；临界携液流量
中图分类号：TE242
文献标识码：A
文章编号：1000-3754（2016）06-0099-05
CALCULATIONOFTHECRITICALLIQUIDCARRY-OVERIN THE WELLBOREFORDOWNHOLEVORTEXDEWATERINGGASRECOVERY
ZHOU Chao', WU Xiaodong, TANG Jingfei', CEN Xueqi'-2, CAO Mengjing',ZHONG Ziyao(1. College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;
2.Sinopec Exploration &Production Research Institute,Beijing 100083,China)
Abstract:Downhole vortex dewatering gas recovery is one of the new techniques. However, at present, the theo-retical researches on the critical liquid carry-over in the wellbore vortex field are still absent. According to the theo-ry of two-phase fluid dynamics, the force analysis was conducted for the liquid droplets in the wellbore vortex field, and then the axial and radical equations of the motion were established. With the help of the magnitude comparison and neglecting the mutual mass force and Basset force, the simplified vertical force equilibrium equation was estab-lished, finally the equations of the critical liquid cay-over velocity and flow rate were deduced. The field case a-nalysis shows that comparing with the calculated critical liquid carry-over in the general wellbore flow field, the cor-responding liquid carry-over in the vortex flow field by means of the theoretical calculation is decreased averagely by 26. 4% ; with the rise of the helical angle, the critical liquid carry-over increases at first then decreases, there exits the minimal helical angle which can minimized the liquid carry-over. The downhole vortex liquid-discharging tech-a be effectively improved, and furthermore the borehole liquid loading can be discharged
收稿日期：2015-12-21
改回日期：2016-07-14
基金项目：国家自然科学基金项目“井简连续温场中重力热管传热理论研究”（50674096）、国家科技重大专项课题“复
杂结构井优化设计与控制关键技术”（2011ZX05009-005)。
作者简介：周朝，男，1988年生，在读博士，主要从事采油采气工程理论与技术研究。
E-mail:zhouchao_joe163.com
万方数据