中高渗透厚油层提高采收率的几点意见——以北断块3_(4-6)~1砂体为例

北断块314-6砂体是江汉油田的典型中高渗透油层,目前已进入高水阶段,面临着自然递减逐年增大和含水上升快等诸多问题。对此,结合该砂体储层特征,在北断块314-6砂体的西北与东南两个区域开展大量研究工作,对西北部大厚层进行密闭取芯、细分等措施挖潜剩余油;东南部薄油层则立足基础井网,进行整体完善,以达到提高采收率的目的。

Suggestions for Enhancing Oil Recovery from Thick Reservoir with Medium-High Permeation

Sandbody reservoir of Northern Fault Block 314-6,a typical medium-high permeation reservoir,is in the high water cut period and faced with problems of increasing natural depletion of oil recovery and fast rising of containing water.Accordingly,combined with the feature of the sandbody reservoir,much research work has been launched at two regions which are respectively in the northwest and southeast of the reservoir.In light of the research,measures including sealed coring and subdivision are taken to tap production potential of remaining oil in northwestern thick layer while in southeastern thin layer overall improvement is made based on basic well pattern to enhance oil recovery.