南翼山浅层油藏Ⅲ+Ⅳ油组井网适应性研究

Study of Accommodation of Well Pattern of Ⅲ+Ⅳ Oil Formation in Nanyishan Shallow Reservoirs

南翼山浅层油藏属于孔隙+裂缝双重介质油藏,受孔隙非均质性和裂缝非均质性影响,强化注水导致油井暴性水淹,温和注水地层能量不足。目前采取间歇注水方式,油井产能低,油藏采油速度低,采出程度低,综合含水高。通过油藏开采特征研究,探索改善油藏开发效果途径,提出将目前反九点注采井网形式转变为排状注采井网方式,对提高油藏注水开发效果具有重要意义。

Nanyishan shallow reservoir was fractured-porous dual medium reservoir,it was influenced by heterogeneity of pores and fractures;strong water-out was induced by enhanced water injection,while in-enough energy was caused by moderate injection.Intermittent water injection was used and low productivity and low production velocity and low recovery percent and high water-cut were induced.Based on the research of reservoir production characteristics,the ways to improve effectiveness of oil reservoir are studied,the current inverse nine spot flooding pattern is transferred to row well pattern,it is of great significance of enhancing the effect of waterflooding.