摘要
针对原油酸值为零的辽河油田曙光４７１４区块原油，进行了碱／表面活性剂／聚合物（简称ＡＳＰ）复合驱油的研究。从１４种表面活性剂中优选出了两种与ＮａＯＨ＋Ｎａ２ＣＯ３混合碱和聚合物复配的ＡＳＰ体系，可使油／水动态界面张力平衡值降至１０－４ｍＮ／ｍ；还研究了该配方体系与原油的乳化性能、长期稳定性，并作出了活性图；驱油实验结果表明在人造岩心上ＡＳＰ体系可提高采收率２０．６％，在人工充填天然油砂岩心上可提高采收率２６．８％，采出液十几分钟后乳化现象消失，油／水彻底分离，界面清晰。本试验结果表明：对于无酸值低活性原油，ＡＳＰ复合驱也具有较好的潜在应用价值。
Of 14 petroluem sulfonates, two (0.2% JH5 4B or JH5 2B) are selected out and 0.5% NaOH+1.0% Na 2CO 3 and 0.08% HPAM AC530 are used to formulate ASP flooding systems for reservoirs of zero acid value and low activity crude oil Block Shuguang 4 7 14 of Liahe. The equillibrium values of dynamic interfacial tension between the systems and the crude can be as low as 10 -4 mN/m. The O/W and W/O emulsions formed with the systems and crude are unstable. The systems are relalively stable at 53℃. The activity diagrams are constructed. In core flood experiments the enhancement in oil recovey by these systems on artificial cores is 20.6% and on natural oily sand packs -26.8%.
出处
《油田化学》
CAS
CSCD
北大核心
1997年第4期352-356,共5页
Oilfield Chemistry
关键词
驱油
ASP驱油
零酸值原油
原油
油藏
低活性
Alkaline/Surfactant/Polymer Flooding Solutions, Grude Oil of Zero Acid Value, Formulations, Performance of Flooding Solutions, Systems of Ultralow Interfacial Tension, Block Shuguang 4 7 14 in Liaohe
