Enhancement of the imbibition recovery by surfactants in tight oil reservoirs
Enhancement of the imbibition recovery by surfactants in tight oil reservoirs
复制标题
表面活性剂提高致密油储层自吸采收率
DOI：
10.1007/s12182-018-0253-y
复制
发表时间：
2018-11-01
影响因子：
5.6
通讯作者：
Wang, Jun-Ru
中科院分区：
文献类型：
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作者：
Meng, Zhan;Yang, Sheng-Lai;Wang, Jun-Ru
水力压裂技术可以显著提高致密油层的石油产量，但动态数据显示产量迅速下降。从长远来看，提高嵌段基质的开发效率是必要的，表面活性剂辅助的渗吸是一种潜在的途径。目前的工作旨在全面解释表面活性剂如何提高渗吸率。通过实验室实验研究了润湿性、界面张力和相对渗透率作为表面活性剂溶液渗吸的关键参数的影响。对不同浓度的十二烷基硫酸钠和聚乙二醇辛基苯酚醚两种不同类型的表面活性剂在储集岩上进行了实验。实验结果表明，润湿性改变和IFT越大，剩余油饱和度越低，原油采收率越高。在实验室规模验证成功后，使用在先前研究中开发的机械模拟器进行参数分析。研究结果得到了参数研究的验证。这项研究探讨了表面活性剂溶液渗吸的机理和影响因素，有助于加深对表面活性剂辅助渗吸和表面活性剂筛选的理解。
Hydraulic fracturing technology can significantly increase oil production from tight oil formations, but performance data show that production declines rapidly. In the long term, it is necessary to increase the development efficiency of block matrix, surfactant-aided imbibition is a potential way. The current work aimed to explain comprehensively how surfactants can enhance the imbibition rate. Laboratory experiments were performed to investigate the effects of wettability, interfacial tension (IFT), and relative permeability as the key parameters underlying surfactant solution imbibition. Two different types of surfactants, sodium dodecyl sulfate and polyethylene glycol octylphenol ether, at varied concentrations were tested on reservoir rocks. Experimental results showed that the oil recovery rate increased with increased wettability alteration and IFT and decreased residual oil saturation. A mechanistic simulator developed in previous studies was used to perform parametric analysis after successful laboratory-scale validation. Results were proven by parametric studies. This study, which examined the mechanism and factors influencing surfactant solution imbibition, can improve understanding of surfactant-aided imbibition and surfactant screening.