官69断块微生物驱油现场试验效果分析

Microbial flooding in Guan 69 Block, Dagang Oilfield

针对大港油田官69断块油藏高含水期水驱效果差的情况,在4个井组实施微生物驱油试验。在断块4 口注水井中注入相同用量的菌种(前缘段塞用胶结能力强的菌种DG002和N80,主体与后尾段塞用N80)后,2 个井组见到较好效果,产量递减放慢、开采状况基本稳定,或者产量增加,含水下降。受益井官69 8井日产从21.88t上升到23.3t,官69 21井含水从95.6%降至93.7%,减缓了区块产量递减。

With water cut rising up, the effect of water flooding on the recovery of the Guan 69 fault-block in Dagang Oilfield became worse. The same amount of microbaterial seeds is injected in each of the 4 injection wells. The DG002 and N80 with special effect on gel is used in the front plug, the N80 is applied in the main and the final plug. Two of the 4 testing well groups got better effects with slower yield decline and stable production performance. The yield of guan 69-8 is up to 23.3 t/d from original 21.88 t/d and the water cut of the Guan 69-21 decrease to 93.7% from original 95.6%.