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[1]韩玉贵,丁名臣,刘义刚,等.无碱与含碱化学体系驱替稠油特征比较[J].断块油气田,2021,(01):129-132,138.[doi:10.6056/dkyqt202101024]
 HAN Yugui,DING Mingchen,LIU Yigang,et al.Comparative study between alkali-free and alkali-containing chemical systems for recovering heavy oil[J].Fault-Block Oil and Gas Field,2021,(01):129-132,138.[doi:10.6056/dkyqt202101024]
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无碱与含碱化学体系驱替稠油特征比较(PDF)
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《断块油气田》[ISSN:1005-8907/CN:41-1219/TE]

卷:
期数:
2021年01
页码:
129-132,138
栏目:
钻采工艺
出版日期:
2021-01-25

文章信息/Info

Title:
Comparative study between alkali-free and alkali-containing chemical systems for recovering heavy oil
文章编号:
24
作者:
韩玉贵1丁名臣2刘义刚1邹剑1赵鹏1王业飞2
1.中海石油(中国)有限公司天津分公司渤海石油研究院,天津 300452;2.中国石油大学(华东)石油工程学院,山东 青岛 266580
Author(s):
HAN Yugui1 DING Mingchen2 LIU Yigang1 ZOU Jian1 ZHAO Peng1 WANG Yefei2
1.Bohai Oilfield Research Institute, Tianjin Branch of CNOOC Ltd., Tianjin 300452, China; 2.College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
关键词:
稠油提高采收率无碱体系含碱体系
Keywords:
heavy oil enhanced oil recovery alkali-free system alkali-containing system
分类号:
TE357.46
DOI:
10.6056/dkyqt202101024
文献标志码:
A
摘要:
稠油含碱体系化学驱能够显著提高采收率,但是碱的加入会带来结垢、采出液破乳难等问题,因此,人们逐渐考虑用无碱体系驱替稠油。当前关于2类体系驱替稠油特征和机理差异的研究较少,为了明确无碱和含碱化学体系驱替稠油差异,文中主要针对表面活性剂 ̄聚合物(SP)和碱 ̄聚合物(AP)体系开展了界面张力(IFT)、乳化性能和驱油特征研究。结果表明,SP和AP驱替稠油机理存在显著不同,即前者通过超低IFT形成油在水中乳化型(O/W)乳状液驱油,而后者与稠油没有达到超低IFT,形成水在油中乳化型(W/O)的乳状液。驱油结果表明,化学体系驱替稠油能力由强到弱依次为:AP、泡沫、SP、聚合物(P)、碱(A)、表面活性剂(S)。这说明:P的加入(扩大波及体积)是提高稠油采收率的前提,然后S和A才能充分发挥其超低IFT和乳化作用;气泡辅助的SP驱 ̄泡沫驱是当前无碱复合体系驱替稠油的较好的注入方式,是接替AP驱的重要技术;与泡沫驱相比,单一SP驱存在对化学药剂的潜在浪费。
Abstract:
The chemical flooding of heavy oil with alkali-containing system can significantly improve oil recovery, but the addition of alkali will lead to scaling and the difficulty of demulsification. Therefore, people gradually consider replacing it with alkali-free system, but there are few reports on the difference of characteristics and mechanism between those two systems. To clarify those differences between alkali-free and alkali-containing chemical systems in recovering heavy oil, the interfacial tension(IFT), emulsification behaviors and oil displacement characteristics of surfactant-polymer(SP) and alkali-polymer(AP) systems were experimentally studied. The results show that there are significant differences in the mechanism of heavy oil recovery between SP and AP: the former is mainly driven by ultra-low IFT and the formation of O/W emulsion, while the latter could hardly reach ultra-low IFT and mainly forms W/O emulsion. The recovery data proves that the ability of the chemical system to displace heavy oil from strong to weak is: AP, foam, SP, polyer, alkali, surfactant, which indicates that the sweep volume enlargement is the prerequisite for improving heavy oil recovery, then, the ultra-low IFT and emulsification mechanism can give full play; on the other hand, foam flooding is the best strategy for displacing heavy oil by the alkali-free systems, which is an important method to replace the AP method. Compared with the foam flooding, the single SP flooding has potential waste to the chemical agent.

参考文献/References:

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备注/Memo:
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更新日期/Last Update: 2021-01-25