吉7井区稠油油藏油水自乳化作用及水驱特征  

Self⁃Emulsification and Waterflooding Characteristics of Heavy Oil Reservoirs in Wellblock Ji⁃7

作　　者：刘艳红[1] 万文胜[1] 罗鸿成 李琛[1] 张武[1] 马宝军[1] LIU Yanhong;WAN Wensheng;LUO Hongcheng;LI Chen;ZHANG Wu;MA Baojun(PetroChina Xinjiang Oilfield Company,Zhundong Oil Production Plant,Fukang,Xinjiang 831511,China;PetroChina Xinjiang Oilfield Company,Jiqing Oilfield Operation District,Jimsar,Xinjiang 831700,China)

机构地区：[1]中国石油新疆油田分公司准东采油厂,新疆阜康831511 [2]中国石油新疆油田分公司吉庆油田作业区,新疆吉木萨尔831700

出　　处：《新疆石油地质》2021年第6期696-701,共6页Xinjiang Petroleum Geology

基　　金：中国石油科技重大专项(2012E-34-05)。

摘　　要：因具有自乳化特征,吉7井区稠油油藏常温注水开发水驱特征不同于稀油油藏和普通稠油油藏,水驱开发驱油效率更高。基于吉7井区自乳化成因及乳化液特性分析,明确吉7井区水驱特征,认为吉7井区中含水期含水率长期稳定的主要原因是油包水自乳化使水油比接近1。进一步提出稳定水油比是适用于稠油油藏水驱管理的有效方法之一,保持水油比稳定在1可使稠油油藏采收率最大化。With self⁃emulsification function,the heavy oil reservoir in Wellblock Ji⁃7 is different from light oil reservoirs and conventional heavy oil reservoirs in waterflooding behaviors at normal temperature,and the waterflooding efficiency is higher in the reservoir.After ana⁃lyzing the cause of the self⁃emulsification and the characteristics of emulsion in Wellblock Ji⁃7,the waterflooding behaviors are defined and it is considered that the main reason for a long⁃term steady water cut in the middle water⁃cut period in Wellblock Ji⁃7 is that the water⁃to⁃oil ratio is close to 1 due to the self⁃emulsification of water⁃in⁃oil emulsion.It is further proposed that stabilizing the water⁃to⁃oil ratio is one of the most effective measures for waterflooding development in heavy oil reservoirs,and keeping the water⁃to⁃oil ratio around 1 can maximize the recovery of heavy oil reservoirs.

关 键 词：吉7井区 稠油油藏 自乳化 乳化液特性 扩大波及体积 水油比 水驱特征 水驱管理 

分 类 号：TE341[石油与天然气工程—油气田开发工程]