二类油层复合驱配方中化学剂适应性及选取  

ADAPTABILITY AND SELECTION OF CHEMICAL AGENTS IN ASP FLOODING FORMULA FOR SECOND-CLASS OIL LAYERS

作　　者：陈广宇[1,2] 田燕春[2] 鹿守亮[2] 赵新[2] 李星[2] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2010年第3期150-153,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：三元复合驱技术在大庆油田的应用将主要集中于剩余地质储量相对较大的二类油层。与一类油层相比，二类油层孔隙半径明显变小、黏土含量及泥质含量显著增加、粒度中值明显降低。针对二类油层储层物性条件相对较差的变化特点，采用多种室内实验相结合的方法，开展了二类油层复合体系配方中化学剂的适应性及优选研究。通过研究给出了二类油层复合驱体系配方中碱及聚合物的选取原则，研究认为强碱对于储层渗透率的影响明显大于弱碱，二类油层复合体系配方中应以弱碱为主；同时给出了三元条件下不同相对分子质量线性聚合物与大庆油田天然岩心渗透率的匹配关系，矿场应用中应根据具体的渗透率分布情况，选择满足80％以上储量分布的渗透率所对应的聚合物相对分子质量为宜。The application of ASP flooding technology in Daqing oilfield will be focused on second-class oil layers with relatively large remaining geological reserves. Comparing with major reservoirs, second-class oil layers properties change a lot, such as smaller pore radius, significant increase of clay content and shale content, decrease of median particle size. According to the poorer reservoir properties of the second-class oil layers, the study of adaptability and optimization of chemical agents for second-class oil layers ASP flooding formula is carried out through many kinds of lab experiments. The selection principles of alkali and polymer in ASP formula for second-class oil layers have been established based on studies. The study indicates that the effect of NaOH on core permeability is bigger than that of Na2CO3. The matching relationship between linear polymer with different molecular weight and the permeability of the natural core from Daqing Oilfield under the ASP flooding is provided. It is recommended that, for pilot application, the polymer, of which its molecular weight is corresponding to the permeability distribution related to more than 80% reserves, should be selected.

关 键 词：二类油层 三元复合驱 体系配方 适应性 

分 类 号：TE351.12[石油与天然气工程—油气田开发工程]