五里湾X1油藏如何提高采收率  

How to improve oil recovery in Wuliwan X1 reservoir

作　　者：杨小鹏[1] 谢依祎 张佳磊 佘继完[1] 刘小平[1] 李晓强[1] YANG Xiaopeng;XIE Yiyi;ZHANG Jialei;SHE Jiwan;LIU Xiaoping;LI Xiaoqiang(Oil Production Plant 3 of PetroChina Changqing Oilfield Company,Yinchuan Ningxia 750006,China)

机构地区：[1]中国石油长庆油田分公司第三采油厂,宁夏银川750006

出　　处：《石油化工应用》2024年第1期47-49,共3页Petrochemical Industry Application

摘　　要：靖安油田五里湾油藏以开发三叠系X1油藏为主,储层为湖成三角洲沉积,属于低渗透油藏,油藏平面、剖面非均质性较强。开发以注水为主,X1油藏目前综合含水率72.5%、采出程度25.4%,处于双高开发阶段,随着注入、采出程度的增大,油藏的平面单向突进、剖面上层内、层间矛盾日益突出,水驱油效率逐渐下降,从而影响着油田的稳产和开发效果,如何提高最终采收率是油藏开发永恒的主体。本文重点总结了X1油藏实施空泡驱、微球驱、注采井网调整、不稳定注水、精准堵水等措施后提高最终采收率,为后期整个X1油藏提高采收率提供方向。Wuliwan reservoir in Jing'an oilfield is mainly developed by X1 reservoir of Triassic system,which is a low permeability reservoir with lake delta deposits and strong heterogeneity in plane and profile,mainly by water injection.At present,X1 reservoir is in double-high development stage with comprehensive water cut of 72.5%and recovery degree of 25.4%.The horizontal one-way breakthrough of the reservoir,the contradiction between the upper layer and the interlayer in the profile are increasingly prominent,and the efficiency of water flooding is gradually declining,which affects the stable production and development effect of the oilfield.How to improve ultimate recovery is the eternal subject of reservoir development.This paper mainly summarizes the measures to improve the final oil recovery of X1 reservoir,such as cavitation flooding,microsphere flooding,adjustment of injection-production well pattern,unstable water injection and precise water shutoff,etc.,it provides direction for enhancing oil recovery of the whole X1 reservoir in the later period.

关 键 词：双高开发阶段 提高采收率 空泡驱 微球驱 注采井网调整 

分 类 号：TE357.61[石油与天然气工程—油气田开发工程]