注入速度对疏水缔合聚合物剪切后恢复性能的影响  

The effect of injection rate on recovery behaviors of hydrophobically associating water-soluble polymers after shearing

作　　者：张瑞[1,2] 秦妮[1] 彭林[1] 胡冰艳[1] 叶仲斌[1,2] 

机构地区：[1]西南石油大学化学化工学院,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《石油学报》2013年第1期122-127,共6页Acta Petrolei Sinica

基　　金：油气藏地质及开发工程国家重点实验室开放基金(PLN1107)资助

摘　　要：针对渤海绥中36-1油田的实际油藏地层条件模拟设计了近井地带模型。研究了注入速度分别为5 m3/(m.d)、10 m3/(m.d)和20 m3/(m.d)时,部分水解聚丙烯酰胺与疏水缔合聚合物2种不同分子结构的聚合物剪切后溶液性能恢复过程。实验结果表明,部分水解聚丙烯酰胺溶液的黏度、阻力系数、残余阻力系数等不能恢复,而疏水缔合溶液经高速剪切后溶液性能可以恢复。在注入速度为5 m3/(m.d)时,疏水缔合聚合物在近井地带最终黏度保留率为92.3,阻力系数保留率为43.7,残余阻力系数保留率为81.1,且随着注入速度增大,溶液的黏度、阻力系数、残余阻力系数降低。在注入速度为10 m3/(m.d)时,黏度、阻力系数、残余阻力系数保留率分别为70.6、35.2、72.7。注入速度为20 m3/(m.d)时,黏度、阻力系数、残余阻力系数保留率分别为55.6、26.3、55.8。利用原子力显微镜观察剪切后疏水缔合聚合物微观形态认为,疏水基团的缔合作用使得原本被高速剪切破坏的溶液网络结构重新生成。A near-wellbore simulation model was designed for the Bohai Suizhong 36 10ilfield. The recovery performance process of partially hydrolyzed polyacryamide（HPAM） and hydrophobically associating water-soluble polymers（HAWP） with different molecu- lar structures was studied with the wellbore simulation model at an injection rate of 5 m3 / （m. d）, 10 m3 / （m. d） and 20 m3 / （m. d）, re spectively. The results show that the viscosity, residual resistance factor and resistance factor of HPAM can not be recovered while solution properties of HAWP after high speed shearing can be restored. With the injection rate of 5 m3/（m.d）, the final retention rate of the viscosity, resistance factor（RF） and residual resistance factor（RRF） of HAWP is 92.3, 43.7 and 81.1, respectively. The viscosity, RF and RRF of H AWP may decrease with the increase of injection rate. When the injection rate is 10 m3/（m, d）, the final retention rate of the viscosity, RF and RRF is 70.6, 35.2 and 72.7, respectively, however, when the injection rate increases to 20m3/（m.d）, the final retention rate of the viscosity, RF, RRF is 55.6, 26.3 and 55.8, respectively. The microstructure of poly mers after shearing was observed with an atomic force microscope. Therefore, the cause of performance recovery for polymer solu tion after shearing was primarily attributed to the association of hydrophobic groups, which makes the network structure of polymer solution regenerate after high-speed shearing.

关 键 词：注入速度 剪切 黏度 阻力系数 残余阻力系数 微观结构 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]