分层采油井下油嘴直径的设计方法

发布时间：2018-04-18 05:27

本文选题：分层采油 + 井下油嘴　；参考：《石油钻采工艺》2017年05期

【摘要】：为有效控制储层物性不同的2套含油系各油层产液量,达到抑制高含水油层、释放低含水油层的目的,借鉴气井井下节流器和注水井分层注水水嘴的设计方法及工作原理,提出了应用井下油嘴控制各油层产液量的技术思路。依据不同油层渗透率、有效厚度、地层压力的差别建立数学模型,首先按达西定律计算不同油层的产液量,然后按不同产液量井下油嘴的过流面积计算其前后压差,再通过控制2个油层的合理生产压差,得到高渗层、低渗层的能量守恒方程,从而优化分层采油井下油嘴的直径。现场应用12口分层采油井,单井平均日增油3.6 t,含水平均下降22.1百分点,为分层采油提供了新的技术手段。
[Abstract]:In order to effectively control the fluid production of two sets of oil-bearing reservoirs with different reservoir physical properties, to restrain the high water-cut reservoir and release the low-water-cut reservoir, the design method and working principle of downhole throttle in gas wells and water injection nozzle in separate zones in water injection wells are used for reference.The technical idea of controlling the liquid production of each reservoir by using the downhole oil nozzle is put forward.According to the difference of permeability, effective thickness and formation pressure of different reservoir, the mathematical model is established. Firstly, according to Darcy's law, the liquid production of different reservoir is calculated, then the pressure difference between front and rear is calculated according to the flow area of downhole nozzle with different liquid production.Then by controlling the reasonable production pressure difference of two reservoirs, the energy conservation equation of high permeability layer and low permeability layer is obtained, so as to optimize the diameter of oil nozzles in stratified oil wells.In the field application of 12 stratified oil wells, the average daily increase of oil per well is 3.6 t, and the average water cut decreases by 22.1 percentage points, which provides a new technical means for stratified oil recovery.
【作者单位】：中国石油华北油田公司第五采油厂;中国石油华北油田公司开发事业部;
【基金】：中国石油股份有限公司重大专项“分层采油工艺试验与应用”(编号:2015E-05-08)
【分类号】：TE93

【相似文献】