南堡1-5区南堡1-7断块含水上升原因分析及治理对策——以NP13-X1020井为例

Analysis on Causes of Water Cut in Fault Blocks 1-7 in Nanpu,District 1-5,Nanbao,and Countermeasures——Take NP13-X1020 as an example

油井出水是注水开发油田普遍面临的问题,油井出水会产生很大危害,减少产量,降低采收率。以南堡油田1-5区块1-7断块中的一口含水上升井及其中所对应的三口注水井为研究对象,在所在区块地质资料及其生产历程的基础上,引入劈分系数法相对准确地计算了该注采单元的注采比,通过各类分析,确定了储层非均质性、28#层边水、开采强度是可能影响NP13-X1020含水上升的因素,明确了该井含水上升的可能原因,提出了降低注采比、控制产量、深度调剖或者机械卡堵、化学封堵等措施来应对该井含水上升。

Outflow of oil wells is a common problem in oilfields for water injection development.The outflow of oil wells can cause great harm,reduce production,and reduce recovery.Taking a water-containing ascending well in Blocks 1-7 of Block 1-5 in Nanpu Oilfield and its corresponding three injection wells as the research object,a dichotomous factor was introduced based on the geological data of the block and its production history.The method has relatively accurately calculated the injection-production ratio of the injection-production unit.Through various types of analysis,it was determined that the reservoir heterogeneity,28-layer water,and mining strength are three factors that may affect the rise in water content of the NP13-X1020.The possible reasons for the increase in water content in this well have been clarified,and measures such as reducing the injection-production ratio,controlling the output,controlling the depth profile or mechanical jamming,and chemical plugging have been proposed to deal with the increase in water content of the well.