AF窄条状油藏Ⅱ砂层组高含水期挖潜技术

Tapping Technology for the Second Member of AF Narrow-strip Sand Reservoir During High Water Cut Period

以新老井测井资料、地质资料及生产动态资料为基础,以油藏精细描述、油藏动态分析、剩余油饱和度和剩余油储量丰度联合评价为手段,对Ⅱ砂层组开展地质再认识以及剩余油分析研究,认为Ⅱ砂层组剩余油主要集中在构造高部位及井间滞留区。在此基础上编制挖潜方案,计划实施油井9口,预计提高采收率3.2%,目前已成功实施了侧AF18A和AF平2井,进一步指导该块下一步挖潜工作的开展,AF油田Ⅱ砂层组初步挖潜成果也为同类老油田的调整和挖潜提供思路和经验。

A lot of research works have been done through the fine reservoir description, reservoir dynamic analysis, combined evaluation of residual oil saturation and the residual oil reserves abundance for the second member of the reservoir, which is based on the new and old well logging, geological and production data. According to them, residual oil is thought to mainly focus on the high structure position and the residence area between wells. On the basis of the preparation of development plan, a plan of9 new oil wells is made, which is expected to improve the recovery rate of 3.2%. At the present, a sidetrack well and a horizontal well, named as AF18A and AF Ping 2 have been implemented successfully, which will be useful to further guide the next tapping work. And in the same time the preliminary potential results of AF oilfield will also provide ideas and experience for the similar old oilfield adjustment and the potential tapping.