摘要
从水平井椭球流态出发,对水平井等压椭球面的渗流理论进行分析和研究,应用了新的坐标变换形式,在三维渗流条件下推导出了新的水平井势分布公式及产能公式,并进一步分析了水平井长度、椭球供给边界距离对水平井产量的影响规律。通过考虑启动压力梯度,推导出低渗透油藏中水平井的产能近似公式,并给出了相应的无量纲产量公式,为利用水平井开发油藏提供了理论依据。
The theory for the ellipsoidal flow with isobaric ellipsoidal surface occurs in horizontal wells is studied and analyzed.New potential distribution formula and deliverability formula in horizontal wells under 3 dimension flow condition are derived,and the influence of the horizontal section length in the well and the distance of the drainage boundary are analyzed by using a new coordinate conversion form.Approximate deliverability formula of horizontal wells in low permeability reservoir is also derived and corresponding dimensionless flow-rate formula is also given by using start-up pressure gradient,thus theoretical basis of application of horizontal wells in field development is provided.
出处
《油气井测试》
2010年第3期1-4,共4页
Well Testing
基金
黑龙江省科技计划项目(2009G0956-00)
关键词
水平井
等压椭球面
坐标变换
势分布
产能
启动压力梯度
horizontal well,isobaric ellipsoidal surface,coordinate conversion,potential distribution,deliverability,start-up pressure gradient
