区间分析法在精细注水管柱设计方面的应用

随着油田开发进入中后期，油层及夹层的厚度越来越小，传统的大卡距大间距分层注水工艺管柱设计已经不 能满足要求，为了提高采油效率，小卡距的精细分层注水工艺应运而生，然而此工艺具有卡封层数多和单层卡距小的 特点，这对管柱力学量的精确计算提出了更高的要求。针对此问题，提出了一种区间分析法，考虑了管柱变形量的主 要不确定因素，建立了三维不确定性管柱力学模型并得到了管柱变形量区间，最后结合现场数据对分析结果进行了验 证，结果表明：现场数据与设计数据高度吻合，提高了注水合格率，对精细注水管柱的设计具有一定的指导意义。

Application of Interval Analysis Method in Design of Fine Water Flooding#br# Injection String

As the oilfield development enters the late period，the thickness of the reservoir and mezzanine becomes smaller and smaller and the traditional water injection technology is unable to meet the requirements of oilfield development. In order to enhance oil recovery，the fine layered water injection process comes into being. However this process possesses the characteristics of mass layers and short layer distance，which tends to bring difficulties to accurate calculation. For this reason，an interval analysis method is proposed in this paper，which takes into consideration the uncertain factors of string deformation and builds a three dimensional，uncertain model and figures out the deformation interval. In the end，the field data and calculation results are compared，as a result，both are highly identical and the qualified rate of water is improved distinctly，which will be of guiding significance for string designing.