水驱周期采油调整效果主控因素研究

Research on the Main Control Factors of Periodic Oil Recovery Adjustment Effect in Water Injection Flooding Oil Block

摘要: 随着萨中水驱特高含水井比例逐年升高、周期采油对产量影响逐年加大；其次在钻降或者大规模增产措施后出现污水过盈现象，也会适时开展周期采油工作。而关于周期采油的相关论述几乎为空白。为了更好的提高周期采油平面调整效果、减少产量影响、改善油层的动用状况，结合生产动态、油层发育条件、油层动用状况等资料，选取了关控井产液级别、区域含水特征、注采井距、关控时间、层间物性差异等5项影响因素，应用数理统计分析方法研究其与周期采油效果的相关性，确定了周期采油影响因素的合理界限，形成了周期采油参数图版，改善周期采油的平面调整效果，为低效无效循环治理提供参考依据。

Abstract: As the proportion of ultra-high water bearing wells in the Sazhong water drive block increases year by year, the impact of cyclic oil recovery on production is increasing year by year; Secondly, if there is a relatively excessive amount of sewage after drilling to reduce pressure or increase production on a large scale, periodic oil recovery work will also be carried out in a timely manner. However, there is almost no relevant discussion on cyclic oil recovery. In order to improve the adjustment ef-fect of periodic oil production level, reduce production impact, and improve the utilization status of oil reservoirs, combined with production performance, oil reservoir development conditions, and oil reservoir utilization status, etc., based on the dynamic changes in production, development condi-tions of oil layers and utilization status of oil layers, six influencing factors were selected, including the liquid production level of controlled wells, regional water content characteristics, injection production well spacing, control time, spatial distribution of controlled wells, and differences in in-terlayer physical properties. Mathematical statistical analysis methods were used to study their correlation with the cyclic oil recovery effect, and reasonable boundaries of each influencing factor were determined, forming a parameter chart for cyclic oil recovery, improving the plane adjust-ment effect of cyclic oil recovery and providing a reference basis for the treatment of inefficient and ineffective circulation.