临13沙二下南块特高含水期细分层系开发技术

The Technology of Subdivision Development in the Stratified and Fault-Block Reservoir of the South Block of L in13 EsX2 in the Per iod of Super-High Water Cut

 韩红霞¹ 石明杰² 邵运堂¹ 张辉¹

胜利油田有限公司临盘采油厂 中原油田分公司采油一厂

临13沙二下南块是一个高丰度的层状断块油藏,采用分层系注水开发。在同套开发井网内,受非均质的影响,层间水驱状况不均衡。2002年,在临13沙二下南块开展了精细油藏描述和细分开发层系工作,效果非常明显,断块含水率下降了4.6% ,采油速度提高了0.41% ,采收率提高了6.3%。实践证明,采用精细油藏描述和细分层系开发的方法,对提高层状断块油藏水驱采收率是行之有效的。

The south block of lin13 EsX2 is a stratified and faulted
reservoirs with high reserve abundance1During the early
p roduction period , the layer series of developmentwas rough,
the technology of full zone injection development was
app lied1Due to the influence of the heterogencity, the situation
ofwater driving is non-equilibrium in the interlayer at the same
well pattern. Since 2000, the composite water cut of this block
was higher than 90%, and the conflict of the interlayer became
aggravated . The original stratum of p roduction and well
pattern would not adjust to the demand of tapp ing potential
p roduction. In 2002, the work of the fine reservoir descrip tion
and the subdivision development had been done in the south
block of Lin13 EsX2 and achieved a very good result .After the
work , the composite water cut was descreased by 4.6% and
the rate of oil production was increased by 0.41% and oil
recovery efficiency was increased by 6.3% . The pratice of
subdivision in the south block of lin13 EsX2 provides usefu reference for the development of the same kind.