特高含水期厚油层细分挖潜方法研究

喇嘛甸油田特高含水期厚油层细分注水，是根据吸水剖面、分层测试成果等资料计算出不同沉积微相储层的累积注水倍数，确定出厚油层内无效注水部位。通过砂体剖面图追踪厚油层内夹层的发育状况，利用物性夹层作为隔层，通过长胶筒封堵底部高吸水部位，改善厚油层顶部的吸水状况；对注水层段多，但层段内存在吸水差异较大的厚油层的注水井，进行层段优化重组，改善差油层吸水状况：对油层多、油层间隔层小、吸水差异大的厚油层注水层段，利用长胶筒封堵技术将与高含水主要吸水层邻近的薄层进行封堵，实现厚油层细分注水的目的。试验表明，该做法对喇嘛甸油田特高含水期控水挖潜的效果较好。

Improve the development effect of the thick oil zones in Lamadian oilfield using water injection subdivision method

The thought of water injection subdivision for thick oil zones in Lamadian Oilfield in ultra-high water cut stage is:to calculate cumulated water injection multiple for reservoirs with different sedimentary microfaces and determine ineffective zones for water flooding in thick zones according to water absorption profile and separated zone test data;reorganize intervals for water injection wells in thick zones which has a large difference of water absorption so as to improve it;use long packers to block the thinner zones adjacent to main water absorption zones;use property interlayers within thick zones as barriers and use long packers to block the bottom parts so as to improve the water absorption on the top part of thick zones.This method is suitable for Lamadian Oil Field in the ultra-high water cut stage and has a good effect.