摘要
实验研究了商品孪连表面活性剂G-52（N，N’-亚丁基双月桂酰溴化铵）的界面活性、润湿性能及对大庆低渗透油藏注水井的降压增注效果。实验温度45℃，实验G-52溶液用矿化度4．9g／L的模拟大庆采油五厂注入水配制，实验原油为黏度82．8mPa·s的该厂脱水脱气原油。用表面张力法测得G-52的临界胶束浓度为800mg/L。G-52溶液与原油间的动态界面张力随G-52浓度增大而增大，其瞬时最低值在G-52浓度25～800mg/L为10^-3mN／m，G-52浓度1000～1200mg/L时为10^-2mN／m，其平衡值在G-52浓度25、50mg／L时为10^-2mN／m，在G52浓度1000～1200mg／L时为10^-1mN／m，低G-52浓度时动态界面张力的建立较缓慢。G-52溶液可使甲基硅油处理的玻片表面由弱亲油变偏亲水，接触角减小约40°。在气测渗透率5．19×10^-3～7．93×10^-3μm^2的4支环氧树脂胶结石英砂岩心驱替实验中，注入浓度100、200、400、500mg/L的G-52水溶液时，岩心注入压力比注水时降低26．5％-55．3％，原油采收率比水驱采收率（30．32％-48．1796）提高3．16％～4．20％。图7表6参7。
The interfacial activity, wetting behavior, and ability of stimulating water injection wells in low permeability reservoirs in Daqing are investigated for commercial gemini surfactant G-52, butylene-N,N＇-bis （layroyl ammonium bromide）. The experiments are conducted at 45℃ with G-52 solution in simulation injection water of TSD = 4.9 g/L of the 5th Daqing production factory and degased and dehydrated crude oil of viscosity 82.8 mPa· s of the same factory. The critical mlcelle concentration of G-52 is of 800 mg/L as shown by surface tension determinations. The values of dynamic interracial tension between G-52 solution and the crude oil increase with increasing G-52 concentration with instant minimum values being of 10-3 mN/m magnititude at G-52 concentration 25--800 mg/L and of 10-2 mN/m magnititude at G-52 concentration 1000-1200 mg/L and with equilibrium values being of 10-2 mN/m rnagnititude at G-52 concentration 25 and 50 mg/L and of 10^- 1 mN/m magnititude at G-52 concentration 100-1200 mg/L and the interracial tension creates and develops slower at low G-52 concentrations. Immersing silicone oil treated glas platelets in G-52 solution changes their surfaces from weakly lipophilic to hydrophilic and decreases the contact angle on the surfaces by about 40°. In flooding experiments on 4 epoxy consolidated quartz core models of air permeability 5.19 × 10^- 3-7.93 × 10^- 3 μm^2 injecting G-52 solution of concentration 100,200,400, and 500 mg/L leads to injection pressure by 26.5-55.3% lowered than that of water injection and to an enhancement in oil recovery of 3.16-4.20% on the basis of oil recovery by water flood 30.32-48.17%.
出处
《油田化学》
CAS
CSCD
北大核心
2007年第2期138-142,共5页
Oilfield Chemistry
关键词
孪连表面活性剂
双季铵盐
油水界面张力
润湿性能
注水井降压增注
低渗透油藏
gemini surfactant
bis-quarternary organic ammonium salt
interfacial tension （IFT）
wetting capability
water injection well stimulation
low permeable oil reser-ooirs
作者简介
徐娜（1980-），女，中国石油大学（东营）石油工程专业学士（2004）、中石油勘探开发研究院和中国科学研究院合办的渗流流体力学研究所流体力学专业硕士研究生（2004-），通讯地址：065007河北省廊坊市44号信箱渗流所，电话：010-69213579，E-mail：xnxn3333@163．com，xum04@mails．gucas．ac．cn
