摘要
水平井裸眼压裂技术是水平井增产的重要技术,球座是水平井压裂关键工具之一。通过建立球座的几何模型,采用Fluent软件,使用离散相模型和磨蚀模型对球座的磨损形态及流道两相流动状态进行数值分析。分析结果表明,在砂粒对球座的冲蚀磨损过程中,球座壁面处砂粒浓度越高,砂粒与壁面的撞击概率也越大,从而导致较为严重的冲蚀磨损;球座锥段处流道流通面积不断缩小,流场速度梯度变化最为强烈,从而导致部分砂粒脱离主流流线冲击球座锥面,产生冲蚀磨损现象。该项研究结果对球座的设计具有指导作用。
Horizontal open-hole fracturing technology is a type of important technology for yield increase in horizontal wells. The ball seat is one of the key tools in horizontal fracturing. Through establishment of ball seat＇ s geometric model and adoption of the Fluent software, the dispersed phase model and abrasion model were used to conduct a numerical analysis of ball seat＇s abrasion morphology and flow channel＇s two-phase flow movement. The analysis shows that in the erosion and abrasion process of sand particle toward ball seat, the sand particle concen- Iration distribution on the wall surface has an important eft^ct on abrasion. The higher the sand particle concentra- lion on ball seat＇ s wall surface, the greater the probability of collision between sand panicle and wall surface. As a result, serious erosion and abrasion occur. The flow channel＇ s flow area at the tapered section of ball seat constantly decreases and the flow field velocity gradient variation is most remarkable. As a result, some sand particles go away from the main flow line to impact ball seat＇s conical surface, resulting in erosion and abrasion.
出处
《石油机械》
北大核心
2014年第3期76-79,共4页
China Petroleum Machinery
基金
国家科技重大专项"低渗油气田完井关键技术"(2008ZX05022-006)
中石化集团公司科技攻关项目"水平井智能完井分段控流关键技术研究"(JP12009)
关键词
水平井
裸眼
压裂
球座
离散相模型
磨蚀模型
FLUENT
horizontal well
open hole
fracture
ball seat
dispersed phase model
abrasion model
Fluent
