甜菜碱表面活性剂对低渗透高矿化度油藏的适应性评价  

Evaluation on adaptability of betaine surfactant to low permeability high salt reservoir

作　　者：刘蕾[1,2] 杜朝锋[1,2] 王丽莉[1,2] 范伟[1,2] 徐飞艳[1,2] 

机构地区：[1]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710018

出　　处：《石油化工应用》2015年第2期98-100,106,共4页Petrochemical Industry Application

摘　　要：通过对甜菜碱表面活性剂在北三区油藏的界面活性、抗盐性、稳定性、吸附性能及驱油效率的测定,评价该新型甜菜碱表面活性剂在低渗透高矿化度油藏的适应性。结果表明,该表面活性剂在北三区油藏条件下,具有较好的界面活性,与该区块脱水原油的界面张力可以达到10-3m N/m数量级;具有良好的抗盐性和长期稳定性;在北三区油砂中可以经历三次静态吸附仍然保持超低界面张力。驱油试验结果表明,1 500 mg/L表面活性剂溶液可比水驱提高驱油效率13个百分点。研究认为,该表面活性剂可以满足低渗高矿化度油藏驱油用表面活性剂的技术要求。Based on measuring the interfacial tension,salt tolerance,long term stability,adsorption,and oil displacement efficiency of betaine surfactant in Bei 3 district,the adaptability of betaine surfactant in low permeability high salt reservoir is studied in this paper. Research results show that the surfactant has good interfacial activity under Bei 3 district reservoir conditions. Interfacial tension between the agent and the dehydrated crude of the block reaches as low as 10-3m N/m.The surfactant has a perfect salt resistance ability and long-term stability.After adsorbed three times on the core of Bei3 district,the interfacial tension is still below 10-3m N/m.Core displacement experiment shows that recovery can be increased by13 % adding 1 500 mg/L surfactant compared with water flooding.It is regarded that the surface active agent can be used to low permeability high salt reservoir.

关 键 词：甜菜碱 表面活性剂 界面张力 高矿化度 驱油效率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]