摘要
针对油田严重出砂的危害及现有防砂工艺存在的问题,指出了割缝衬管防砂的优越性及适度出砂割缝衬管缝宽设计的重要性。介绍了割缝筛管防砂的机理,建立了出砂的数学模型、割缝衬管表皮模型及割缝衬管防砂产能模型,基于模型比较了不同防砂程度情况下的增产比,提出了临界缝宽的概念。计算分析表明:采取防砂措施后,随着缝宽减小,产量减小,增产比降低;不同防砂程度相比较,得出了割缝衬管防砂临界缝宽;大于临界缝宽时,采取防砂措施时的产量和增产比比不防砂时高,而小于临界缝宽时,采取防砂措施时的产量和增产比比不防砂时低。
Considering the damage caused by severe sand production and the problems existing in current sand control techniques, this paper points out the advantages of using screen liners for sand control and the importance of its width design. This paper introduced the sand control mechanisms of screen liners. A sand production model, a skin model and a sand control productivity model of screen liners were build. Stimulation results were compared in various sand control conditions based on these models and the concept of critical slot was proposed. Calculations indicate that, after sand control, productivity deteriorates with the decrease of slot width; critical slot width of screen liner was determined after comparing various sand control results. When the width is larger than critical width, production and stimulation of well with sand control is higher than that without sand control; when the width is less than critical width, pro- duction and stimulation of well with sand control is less than that without sand control.
出处
《石油钻探技术》
CAS
北大核心
2008年第3期1-4,共4页
Petroleum Drilling Techniques
基金
教育部"长江学者和创新团队发展计划"项目(编号:IRT0411)资助
关键词
出砂
割缝衬管
衬管完井
裂缝宽度
sand production
slotted liner
liner completion
fracture widenes
