用驱油效率实验优选矿场应用的聚合物分子量及用量  

Optimization of polymer molecular weight and quantity by oil displacement efficiency experiment.

作　　者：谢峰[1] 皇海权[1] 

机构地区：[1]河南石油勘探局勘探开发研究院

出　　处：《油气采收率技术》1998年第3期8-12,共5页

摘　　要：用不同分子量、不同浓度的聚丙烯酰胺（ＨＰＡＭ）溶液在人造岩心上进行较系统的驱油实验，结果表明：（１）分子量越高，或浓度越大，溶液的增粘性就越强，驱油效率也越高；（２）当分子量和溶液粘度相同时，驱油效率随残余阻力系数的增加而提高；（３）当注入溶液的孔隙体积一样时，每吨聚合物的增油量随溶液浓度的增加而下降。以岩心做的驱油效率实验为基础，用简便方法优选出适合河南油田的聚合物分子量为１４３０万，用量为３２０ＰＶ·ｍｇ／Ｌ。在河南油田面积为３．０１ｋｍ２的聚合物驱矿场先导试验中，经三年零二个月的试验，全区增油４．８５×１０４ｔ，提高采收率９．１９％，每吨聚合物增油２１０ｔ，取得了很好的经济效益。Series of experiments with solution of polyacry lamide having different molecular weight and different concentration in a man made core show that (1) the greater the molecular weight or the concentration is,the greater the solution viscosity is and the higher the oil displacement efficiency is; (2) while the molecular weight and the solution concentration are constant,oil displacement efficiency increases with the increasing of residual resistance factor;(3) in the case of the same solution volume injected, the oil production increment per ton polymer reduces with the increasing of solution concentration. Based on the oil displacement efficiency experiment with a core,a simple way is used to screen out the polymer molecular weight (1430×10 4) and quantity (320mg/L×PV) suitable for Henan oilfield. In the polymer flooding field pilot test lasting 3 years and 2 monthes in Henan oilfield, test area is 3.01 km 2; oil production increased by 4.85×10 4 ton ; oil recovery enhanced by 9.19%, oil production increased by 217 ton per ton polymer;good economic benefit has been obtained.

关 键 词：聚合物驱油 驱油效率 聚合物用量 三次采油 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]