支化预交联凝胶颗粒封堵性能与调剖能力评价  

Evaluation on the plugging performance and profile control ability of the branched-preformed particle gel

作　　者：于龙 李亚军[1] 宫厚健[1] 桑茜 王金杰 董明哲[1] 董小钰 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油大学(华东)储运与建筑工程学院,山东青岛266580

出　　处：《油气地质与采收率》2015年第5期107-112,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金项目"油气水三相微观-连续介质三维流动模拟研究"(51274225)和"缝洞型介质等效连续模型油水两相流动模拟理论研究"(51204198);博士点基金项目"注溶剂提高稠油采收率的微观-连续介质模拟研究"(20110133110007);中央高校基本科研业务费专项资金资助"页岩气渗流机理及有效动用条件研究"(14CX05021A)

摘　　要：为研究粘弹性支化预交联凝胶颗粒（B-PPG）的封堵性能与调剖能力,进行了单管填砂岩心封堵实验和非均质平行双管填砂岩心驱替实验.实验结果表明：B-PPG以不断堆积堵塞与变形通过孔道的方式在岩心中运移,能够对岩心窜流通道进行有效封堵,阻力系数增大,封堵效率在97%以上;岩心阻力系数和封堵效率随岩心渗透率、B-PPG质量浓度和模拟地层水矿化度的增大而增大,随注入速度和温度的增大而减小.B-PPG通过选择性封堵高渗透岩心、液流转向的作用改善非均质岩心的吸水剖面.当岩心渗透率级差小于7.1,B-PPG段塞为0.25-1.0倍孔隙体积时,B-PPG都表现出良好的调剖效果.Single-core plugging and heterogeneous parallel-dual-core flooding tests were carried out to investigate the plugging performance and profile control ability of viscoelastic branched-preformed particle gel(B-PPG). The results show that B-PPG migrates in the core in a manner of plugging-alternating-pass by deforming and restoring its particles shape alternately. The high permeability channels in the core can be blocked effectively by B-PPG and a high resistance factor and plugging efficiency(higher than 97%)can be achieved. Both the resistance factor and plugging efficiency increase with the increase of the core permeability,B-PPG concentration,and brine salinity;however,both factors decrease with the increase of injection rate and temperature. The water injection profile in the heterogeneous parallel cores can be significantly improved because B-PPG can selectively block high permeability core and divert the displacement to the low permeability core. B-PPG exhibits a good performance in profile control when the high to low permeability ratio of the two parallel cores is smaller than 7.1 and the injected B-PPG slug is between 0.25 to 1.0 PV.

关 键 词：支化预交联凝胶颗粒 阻力系数 封堵效率 非均质 调剖能力 

分 类 号：TE357.43[石油与天然气工程—油气田开发工程]