葡北油田稀油油藏注蒸汽过程中采出水性质变化特征研究  

Characteristics of Changes of Produced Water during Light-oil Steam Drive in Pubei Oilfield

作　　者：侯君[1] 程林松[1] 房宝才[2] 

机构地区：[1]中国石油大学(北京)石油天然气工程学院,北京102249 [2]大庆油田有限责任公司第四采油厂,黑龙江大庆163512

出　　处：《石油天然气学报》2006年第3期121-123,共3页Journal of Oil and Gas Technology

摘　　要：研究了葡北油田稀油油藏蒸汽驱过程中采出水性质的变化特征,了解稀油油藏蒸汽驱过程中采出水性质所呈现的规律,为评价稀油油藏蒸汽驱开发效果提供理论依据。注蒸汽初期,Cl-、Mg2+、Ca2+浓度急剧下降,该阶段是蒸汽驱的储备阶段,整个过程油井产量并不变化;随着注汽进程的推进,3种离子浓度大幅度上升,其中,Cl-浓度超过其初始值,Mg2+、Ca2+浓度接近初始值;该阶段是蒸汽驱的见效阶段,主要表现为产油量上升、油层温度升高。On the basis of field test, the characteristics of produced water changes during steam drive in Pubei Oilfield are studied, the law of the water changes during the steam drive in light-oil reservoirs is clarified to provide theoretical basis for evaluating the production effect by steam drive in light-oil reservoirs. At the initial stage of steam drive, the concentrations of Cl^-, Mg~ 2+ and Ca~ 2+ are reduced sharply, which is the period of steam storage, well production output remains unchanged in the whole process. With the advancement of steam injection, the concentrations stated above increase greatly, where Cl^- is over the initial value, the concentrations of Mg~ 2+ and Ca~ 2+ are approaching to initial value, it is the period of response, where oil production increase with temperature rising in the reservoir.

关 键 词：稀油油藏 蒸汽驱 采出水 氯离子浓度 硬度 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]