曲流河层内夹层分布对水驱开发效果的影响  

Influence of Meandering River Interbed Distribution on the Effect of Waterflooding

作　　者：贾红兵[1] 杨丽君[2] 渠永宏[1] 白振强[1] 李新峰[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]大庆油田有限责任公司天然气分公司,黑龙江大庆163459

出　　处：《石油天然气学报》2008年第3期114-116,共3页Journal of Oil and Gas Technology

摘　　要：根据喇萨杏油田曲流河层内夹层分布特征及喇萨杏油田PⅠ组油层参数,建立了夹层数值模拟模型。研究了夹层倾角、水平间距、纵向延伸长度/油层厚度(H夹层/H油层)等因素对水驱采收率和含水率的影响。结果表明,夹层倾角、间距及H夹层/H油层对水驱采收率均有影响,且幅度较大;随倾角(3～15°)增大水驱采收率增加,但7～15°增幅较缓;夹层间距(10～40m)增大,水驱采收率近似呈线性增加;H夹层/H油层(0～2/3)增加,水驱采收率降低;随夹层倾角和水平间距增大,含水率下降;H夹层/H油层对含水率影响较大,相同采收率下,随H夹层/H油层增加,含水率明显增加。得出了夹层分布对水驱开发效果有重要影响的结论,提出了今后进行油藏精细描述和层内剩余油挖潜应重视夹层分布影响的建议。A model of interbed simulation was established according to the distribution characters of meandering river interbed and parameters of PI Oil Formation in Lasaxing Oilfield.The effects of interbed dip,horizontal spacing,vertical extension length/reservoir thickness on oil recovery factor and water cut of waterflooding were studied.The result shows that the interbed dip,spacing and ratio of vertical extension and reservoir thickness have influence on recovery factors on waterflooding.With the increase of dip(3～15°),recovery factor of waterflooding raises,but when it is in 7～15°,the interbed spacing(10～40m) increases the waterflooding recovery factor increases linearly,the vertical extension and reservoir thickness(0～2/3) increase,the recovery factor decrease.With the increase of dip and horizontal spacing,water cut decreases.The vertical extension and reservoir thickness have great influence on water cut,also the recovery factor reduces.As the increase of both,water cut increases obviously.The interbed distribution has an important influence on the effect of oil development.

关 键 词：夹层 倾角 水平间距 纵向延伸长度 曲流河 水驱 采收率 

分 类 号：P618.13[天文地球—矿床学]