CO2增注剂与油藏的适应性  

Adaptability of CO2 Augmented Injection Agent and Reservoir

作　　者：田巍[1,2] TIAN Wei(Research Institute of Petroleum Exploration&Production,Zhongyuan Oil Field Company Ltd.,Sinopec,Puyang 457001,China;Working Station for Postdoctoral Scientific Research,Zhongyuan Oil Field Company Ltd.,Sinopec,Puyang 457001,China)

机构地区：[1]中国石化中原油田分公司勘探开发研究院,濮阳457001 [2]中国石化中原油田博士后科研工作站,濮阳457001

出　　处：《科学技术与工程》2020年第33期13628-13634,共7页Science Technology and Engineering

基　　金：河南省博士后科学基金(2018120)。

摘　　要：针对油藏CO2驱开发注气增注剂与油藏的适应性问题,以中原油田某储层为研究对象,采用室内试验手段,分别考察了降低界面张力型增注剂LB-1和改善润湿性型增注剂NR-1与储层流体及储层多孔介质的适应性。结果表明:两类增注剂均适于在该目标区块推广应用,两种增注剂与地层水混合未产生任何沉淀和絮状物,并且与原油的乳化效果较好;在一定的浓度区间上,前者可使油水界面张力降低一个数量级,后者能够将岩石润湿角提高3倍以上,两者的作用效果非常明显并且稳定性好;在较低吸附滞留量范围内,可具有较好的防膨性能;基于上述适应性数据分析,分别优选了两类增注剂的适应性浓度区间,从而形成了一种增注剂浓度优选与评价方法;室内实验提高注气能力6%以上,研究成果为注气开发的现场实施提供重要的技术参考。The focus was the adaptability of augmented injection agent to improve the gas injection capacity for the development of reservoir CO2 flooding.Taking a reservoir in Zhongyuan Oilfield as the research object,the adaptability of augmented injection agent to formation fluid and reservoir was investigated by means of laboratory test.The results show that the LB-1 and the NR-1 are suitable to be used in the target area.The two kinds of augmented injection agent do not produce any precipitates and floccules when mixed with formation water,and have good emulsification effect with crude oil.In a certain concentration range,the former can reduce the interfacial tension of oil and water by an order of magnitude,while the latter can increase the wetting angle of rock by more than three time.The two agents are obviously effective and stable.In the range of lower adsorption retention,both have good anti-swelling performance.Based on the above data analysis,the adaptability concentration range of the two kinds of augmented injection agent were optimized,and thus a method of concentration optimization and evaluation was formed.The gas injection capacity was increased more than 6%in the laboratory experiments.The research results provide important technical reference for the field implementation of gas injection development.

关 键 词：增注剂 适应性 界面张力 润湿性 稳定性 浓度 

分 类 号：TE341[石油与天然气工程—油气田开发工程]