海南花场油田花117X区块综合治理研究

Research on Comprehensive Treatment of Hua 117 Block in Huachang Oilfield in Hainan

福山油田花117X区块经历了多次调整后,井网密度适中、注采井距适中、水驱储量控制程度较高,但由于储层非均质性严重,整体表现为层系适应性差、水驱储量动用程度较低、水驱效果变差、地层能量保持状况差。为加强综合治理,花117X区块通过静态精细小层对比建立了单砂层油藏地质模型,为区块下步分析和调整提供了地质依据;在区块开发效果评价上采用了多种方法相结合来综合判断;单砂体剩余油定量描述技术是研究剩余油的关键,同时结合沉积微相研究,进一步了解了平面及纵向上剩余油的分布状况;结合Ⅱ油组和Ⅳ油组不同的剩余油分布状况,制定了有针对性的治理原则,提出了下步综合治理方案。

Multiple-time adjustment of Hua 117 X Block in Fushan Oilfield makes its well spacing density and injection-production spacing moderate and waterflooding reserves controlled well. However,high formation heterogeneity makes its bed series adaption poor,waterflooding reserves produced degree lower,waterflooding result worse and stratum energy maintenance condition bad. To strengthen comprehensive treatment of Hua 117 X Block,single sand unit reservoir geological model is established through static comparision of fine layers to provide the geological basis for next analysis and adjustment. Multiple methods are combined to evaluate its development effect. Remaining oil distribution horizontally and vertically is clear through combining sedimentary microfacies reserach with single sand unit remaining oil quantitative description technology which is the key means for studying remaining oil. At the same time,a well-targeted treatment principle and a comprehensive treatment plan are worked out according to Oil Group 2 and 4 where remaining oil distribution status is different.