基于密闭取心井和模糊评判分析埕岛油田水淹状况

Water out behavior analysis of Chengdao Oilfield by sealing core drilling and fuzzy comprehensive evaluation

目的探究埕岛油田馆陶组上段油层的水淹状况。方法结合密闭取心井分析,遴选5个控制水淹层变化的参数,采用模糊综合评价方法定量评价埕岛油田的水淹状况。结果流线位置、每米采液量、物性、井距和储层非均质性这5个参数从储层与注采两个方面影响着储层的水淹变化;使用模糊评价方法统计了11口新井的水淹状况,符合率达到84.2%。结论埕岛油田的水淹状况以弱水淹—中水淹为主,剩余油富集;Ng 5砂组油层厚度大,储层物性好,水淹程度最强。

Based on Aim To study the water out behavior of the Upper Guantao formation in Chengdao Oilfield. Methods sealing core drilling, five parameters which controls water flooded layer were selected. The water out be- havior of Chengdao Oil field was evaluated by fuzzy comprehensive evaluation. Results The water out behavior was affected by flowline, fluid withdrawal rate of per meter, physical property, well spacing and heterogeneity from res- ervoir and injected and prdouced fluid balance. The coincidence rate of eleven new well was 84.2%. Conclusion Chengdao Oilfield is weak and medium waterflooding , remaining oil accumulation. Reservoir thickness of Ng5 is great, physical property is good, the water flooding degree is the strongest.