边底水驱高含水厚油层剩余油分布特征及挖潜实践

Remaining Oil Distribution Feature of Thick Oil Reservoir with High Water Cut of Edge and Bottom Water Drive and Its Exploration Practice

边底水活跃的油藏，天然能量充足，总体开发效果较好，但统计发现产油量往往与油层厚度不成比例，厚度2～3m的油层时常累产油达几万吨，而有些7～8m以上厚油层累产油不足万吨。通过剩余油监测，结合剩余油分布研究，高含水期的厚油层仍有较大潜力。近几年来，华北油田技术人员针对水淹厚油层剩余潜力，应用复合堵水、钻水平井等技术挖掘层内剩余油，取得较好效果，对同类油藏剩余油挖潜和提高采收率有一定借鉴意义。

For active edge and bottom water reservoir,sufficient natural energy,the overall development effect is better,but the statistics is found that oil production is often not associated with the thickness of oil out of proportion,thickness of 2~ 3 m formation often tired up to tens of thousands of tons of oil,and some of the above 7~ 8 m thick reservoir tired oil less than ten thousand tons.By monitoring the remaining oil,and combined with study on the distribution of remaining oil,thick oil layer with high water cut stage still has a potential.In recent years,Huabei oilfield technical staff achieves better results for residual potential of the thick oil reservoir,by applying the composite water shutoff,drilling horizontal well technology to excavate the remaining oil,which has certain reference significance to excavate the remaining oil potential and increase recovery for the similar reservoirs.