用于注聚驱后的含有中强缓冲碱三元复合体系研究

用于注聚驱后的含有中强缓冲碱三元复合体系研究

于丽¹^,²，孙焕泉³，肖建洪¹，陈辉¹，曹正权¹，宋岱峰¹，郑利强²，李干佐²

1. 中国石化股份胜利油田分公司孤岛采油厂，山东东营 257231；2. 山东大学胶体与界面化学教育部重点实验室，山东济南 250100；3. 中国石化股份胜利油田分公司，山东东营 257000

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-10-24 发布日期:2006-10-24
通讯作者: 于丽

Studies on the ASP compound system with moderate basic strength alkali after polymer injection flooding

YU Li¹^,²，SUN Huan-quan³，XIAO Jian-hong¹，CHEN Hui¹，CAO Zheng-quan¹，SONG Dai-feng¹，ZHENG Li-qiang²，LI Gan-zuo²

1. Gudao Oil Recovery Plant, Shengli Oil Field of SINOPEC, Dongying 257231;2. Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100;3. Shengli Oil Field of SINOPEC, Dongying 257000, Shandong

Received:1900-01-01 Revised:1900-01-01 Online:2006-10-24 Published:2006-10-24
Contact: YU Li

摘要/Abstract

摘要： 针对胜利油田孤岛河滩油区注聚驱后，开展改性天然羧酸盐/缓冲碱/聚合物三元复合驱研究。先对改性天然羧酸盐SDCM-2的界面活性及其影响因素进行了系统的研究，然后通过室内物理模型实验，研究了水驱、聚驱、缓冲碱ASP复合驱的驱油效果，当复碱质量分数为1.5%（碳酸钠与碳酸氢钠质量比为1：1），SDCM-2质量分数仅为0.1％时油水界面张力就能达到超低；在注聚驱后，缓冲碱ASP复合驱室内驱油效率为18％OOIP；最后开展可视化微观模型驱油实验，直接观察了流体在孔隙介质内的流动形态。实验结果为：ASP体系进入模型中，能够使注聚后束缚残余油重新启动，使油块变形、拉细，通过毛细管喉道，渐渐形成油墙向出口处运移。表明缓冲碱ASP复合驱能够有效扩大波及体积、提高洗油效率，从而使驱油效率得到有效提高，该方法是注聚后提高采收率的有效方法之一。

关键词: ASP三元复合驱, 缓冲碱, 聚合物驱后 , 微观模型, 室内模拟驱油

Abstract: Modified natural carboxylate/buffer base/polymer flooding was studied for the Gudao River Shoal Oil of the Shengli Oil Field after polymer injection flooding. First, interfacial activating and the influence of modified natural carboxylate , i.e., SDCM-2 was systematically investigated. Then, the effects of water flooding, polymer flooding and buffer base ASP flooding were studied by laboratory physical simulation experiments. When the concentration of mixed alkali (m(Na2CO3)∶m(NaHCO3)=1∶1) is 1.5% and the concentration of SDCM-2 is 0.1%, the oil-water interfacial tension reaches to a ultra-low level. The flooding efficiency of buffer base ASP flooding is 18％OOIP after polymer injection flooding. Finally, a visualized microscopic simulation flooding experiment was developed and the flow pattern of fluid in porous media was directly observed. Results show that the binding residual oil after polymer flooding deforms to be thinner and longer, then forms an oil bank through the capillary throat and moves to exit when the ASP system is added into the model. It is also shown that buffer base ASP flooding can improve flooding efficiency apparently by enlarging the swept volume and advances washing oil efficiency. Buffer base ASP flooding is one of the efficient methods to enhance recovery efficiency.

Key words: polymer flooding , microscopic simulation, laboratory simulation flooding, buffer base, ASP flooding

中图分类号:

TE327

于丽,孙焕泉,肖建洪,陈辉,曹正权,宋岱峰,郑利强,李干佐 . 用于注聚驱后的含有中强缓冲碱三元复合体系研究[J]. J4, 2008, 43(3): 16-20 .

YU Li,SUN Huan-quan,XIAO Jian-hong,CHEN Hui,CAO Zheng-quan,SONG Dai-feng,ZHENG Li-qiang,LI Gan-zuo . Studies on the ASP compound system with moderate basic strength alkali after polymer injection flooding[J]. J4, 2008, 43(3): 16-20 .

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