摘要
蛇曲井是一种新的复杂结构井,其生产井段起伏较大,不能直接用常规水平井产能公式计算其产能。以1口蛇曲井在无界地层中生产时引起的势分布为基础,根据镜像反映和势叠加原理,建立了底水油藏、气顶底水油藏及边水油藏中1口蛇曲井生产时的势分布和压力分布方程。考虑井筒流动和地层渗流的耦合作用,建立了蛇曲井的稳态产能计算模型,给出了模型的求解方法。实例计算表明:当井的水平段起伏较大时,不能将其处理为水平井,而应根据蛇曲井产能计算模型计算其产能,否则将导致产能预测出现较大偏差。
Snaky well is a new type of complex well. The wellbore pressure drop of snaky well can＇t be neglected for its producing interval has large fluctuation, and the conventional productivity calculation methods for horizontal wells could not be applied directly for snaky wells. It is necessary to set up a model for calculating steady state productivity of snaky wells. On the basis of a snaky well＇s distribution of potential produced in an infinite reservoir, this paper uses the mirror image and the principle of superposition to obtain the velocity potential and pressure distribution for bottom water reservoirs with and without gas cap, and edge water reservoir. Coupling wellbore flow with fluid flow in the formation, a steady state productivity model for the snaky well is developed and solved. Example calculation shows that the steady state productivity model of snaky well should be used in calculating the productivity of a horizontal well with large fluctuation; otherwise, big errors would be produced.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期87-90,共4页
Petroleum Exploration and Development
基金
国家自然科学基金项目"高含硫裂缝性气藏流体相变与气液固耦合综合模型研究"(50474039)资助
关键词
蛇曲井
产能模型
势分布
井筒压降
snaky well
productivity model
potential distribution
wellbore pressure drop
作者简介
戚志林（1969-），男，四川营山人，现为中原油田分公司博士后，主要从事油藏数值模拟及油气藏工程方面的研究。地址：河南省濮阳市中原路，中原油田勘探开发研究院天然气室，邮政编码：457001；电话：（0393）4823653。E-mail：qizhili@sina．com
