高含水后期多层砂岩油田单砂体注采关系完善程度评价

针对多井网、多油层非均质砂岩油田油水井数多、井网间开发层系相互交叉、注采关系复杂的特点,如何及时、客观、准确评价单砂体水驱控制程度是高含水后期精细挖潜的技术保证。在精细地质研究的基础上,通过对影响单砂体注采关系因素分析,利用近年来大庆油田检查井资料及统计学方法,提出单砂体注采关系完善程度评价方法。该方法具有标准统一、客观性强、准确程度高的特点,为多井网、多油层油田单砂体注采关系完善程度及潜力评价提供了有效途径,在大庆油田区块调整、综合治理、措施井层优选中得到较好应用。

Evaluation on injection-production relationship of single sandbody in multiple-layer sandstone oilfields in later high water cut stage

Aiming at heterogeneous sandstone oilfield with multiple-well pattern and multiple-layer being featured with large amount of oil/water wells, intercrossing between well patterns and with complex injection-production relationship, how to evaluate objectively and accurately single sandbody water-flooding ontrol degree on time is technical assurance for fine analysis in later high water cut stage. Based on fine geologic study and analysis on factors that affect single sandbody injection-production relationship, the evaluation method of improving injection-production relationship in single sandbody is proposed by inspection well data and statistics method in Daqing Oilfield in recent years. This method is featured by uniform criteria, strong objectivity and high accuracy, and provides an effective way to evaluate the potentialities and improved degree of injection-production relationship for single sandbody in multiple-well pattern and multiple-layer oilfield. The good effect has been made by this method in block adjustment, comprehensive treatment, and stimulating wells and layer optimization in Daqing Oilfield.