适用于高矿化度地层调剖剂实验研究  

Experimental study on profile control agent for high salinity formation

作　　者：闫建文[1,2,3] 张玉荣[4] 才程[2,3] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石油勘探开发研究院,北京100083 [3]中国石油天然气集团公司采油采气重点实验室,北京100083 [4]大庆石油学院石油工程学院,黑龙江大庆163318

出　　处：《油气地质与采收率》2009年第6期70-72,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项课题“大型油气田及煤层气开发”(2008ZX05010)一级专题“高含水油田提高采收率新技术”(2008ZX05010-004)

摘　　要：在高温高盐油藏,地层水矿化度高,常规调剖剂适应性差、有效期短,调剖堵水存在一定的难度。为此,研究了适用于高盐油藏的新型调剖剂,其作用机理是让调剖剂在地层一定部位发生有效的作用,其主剂为硅酸钠溶液,以油包水乳状液的形式注入地层,破乳后与地层水中的钙镁离子发生化学反应,在地层中产生化学沉淀,封堵高渗透层。在室内开展了调剖剂稳定性、流变性和封堵性实验,结果表明,由乳液型调剖剂组成的调剖体系具有封堵时间可控、封堵率高达98.5%、堵水有效期长的特点,在水驱10倍孔隙体积时,渗透率保持不变,调剖剂优先进入高渗透层且对其封堵效果好,因此,该体系可用于高矿化度油藏调剖,封堵高渗透条带,起到降水增油的作用。Due to the high formation water salinity,poor adaptability and short validity period of general profile control agent,there is certain difficulties in the application of profile control and water-shutoff in high temperature and high salinity oil reservoirs. Therefore,a new kind of profile control agent,which plays an effective role at the specific places of reservoirs,was developed for the high salinity oil reservoirs. The profile control agent,with sodium silicate solution as host agent,was injected into formations in the form of water-in-oil emulsion,and reacted chemically with the calcium and magnesium ions in formation water after demulsification,then formed chemical precipitation to plug the high permeability zones. After the laboratory experiments of the profile control agent's stability,rheological property and sealing property,it showed that tbe profile control agent in every system composed of emulsion profile control agent has the characteristics of controllable plugging times,plugging rate as high as 98.5% and long validity period of plugging. At 10 times of pore volume in water injection,the permeability remained constant ,and the profile control agent was prior to entering into the high permeability zones and plugged it well. The profile control agent suitable for high salinity oil reservoirs plugged the high permeability zones and played a role on increasing oil production and decrea-sing water production in field application.

关 键 词：调剖 高矿化度 油包水乳状液 热稳定性 流变性 封堵性 

分 类 号：TE341[石油与天然气工程—油气田开发工程]