基于层间均衡驱替的注水井分层配注方法  

Separate-Layer Water Injection Allocation Based on Inter-Layer Balanced Waterflooding

作　　者：马奎前 陈存良 刘英宪 Ma Kuiqian;Chen Cunliang;Liu Yingxian(CNOOC(China)Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司

出　　处：《特种油气藏》2019年第4期109-112,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001)、“海上稠油油田开发模式研究”(2016ZX05025-001);中海石油(中国)有限公司综合科研项目“渤海双高油田挖潜关键技术研究”(YXKY-2018-TJ-04)

摘　　要：油藏纵向非均质性造成注水舌进,层间开采差异大,导致油田开发效果不理想。针对此问题,根据储层采出程度与注入孔隙体积倍数的关系,利用迭代法对各层注水量进行重新分配,以实现油田各层采出程度相同的均衡驱替目标,从而形成一种基于层间均衡驱替的注水井分层配注新方法。将研究成果应用于渤海BZ油田,新方法实施后区块平均日增油23 m 3/d,含水下降约4%,起到了较好的降水增油效果。新方法有效增加了储层的动用程度,提高了注入水的利用率,减少了注入水的低效无效循环,提升了油田的开发效果,对进一步挖潜剩余油具有重要指导意义。The longitudinal reservoir heterogeneity leads to the water fingering in the waterflooding reservoir,which usually results in great inter-layer production difference and poor development performance.Iterative method was used to re-allocate the water injection volume of each layer according to the relationship between reservoir recovery degree and injection pore volume.A new water injection allocation method based on inter-layer balanced waterflooding was proposed to gain a balanced waterflooding performance with equal recovery degree in each layer.This study was applied to Bohai BZ Oilfield,which shows a favorable water-cut reduction and oil enhancement performance.After implementation,the average daily oil increment is 23 m ^3/d and the water-cut reduction is about 4%.This new method effectively increases reservoir producing level,improves the utilization rate of injection water,reduces inefficient circulation of injection water and enhances oilfield development performance,which could provide certain guidance to the further remaining oil recovery.

关 键 词：多层合采 层间矛盾 均衡驱替 分层注水 动用程度 

分 类 号：TE341[石油与天然气工程—油气田开发工程]