秦皇岛32-6油田南区产吸剖面分析

Analysis on production and injection profile in the south area of QHD 32-6 Oilfield

徐玉霞 沈明 葛丽珍 张鹏 李廷礼

中海石油（中国）有限公司天津分公司，天津 300452

Tianjin Company, CNOOC, Tianjin 300452, China

秦皇岛32-6油田南区的主力油组是NmⅠ油组，但是产液剖面和吸水剖面测试数据反映Nm 0油组的采液强度和吸水强度远远大于NmⅠ油组，与储层物性和储量基础相矛盾。将南区从投产到转注以前的产液量精细劈分到各单砂体，得出在主力单砂体上，Nm 0 32砂体的相对采出百分数大于NmⅠ39砂体，地层相对亏空较大，导致大部分水都注到了Nm 0油组，推断目前Nm 0油组存在水窜，形成注入水的无效循环。根据分析结果，对于单井，关闭C24井的Nm 0油组后，产油量有明显的上升趋势；对于南区注采层位的调整，在数模方案里考虑单注NmⅠ油组，得到较好的增油效果。

NmⅠis the main pay group in QHD32-6 Oilfield, but the test data of production and injection profile indicates that the
produced intensity of fluid and intensity of water injection in pay group Nm 0 are much greater than that in NmⅠ, which is contrary
to the reservoir permeability and reserves base in the south area. Aimed at this problem, the total fluid production is distributed to
the main single sand body and the relative recovery percentage of Nm 0 32 is more than that of NmⅠ39. Therefore, the relative
formation voidage is more than that of NmⅠ39, too. It is deduced that the injected water flows to Nm 0 ,then water breakthrough and
non-effective circulation of injected water are gradually formed. According to this conclusion, after the layer group Nm 0 in Well
C24 is shut down, the oil production obviously increases for a single well. After adjusting the layer of injection and production in
south area, the effect of oil increasing is good.