生物纳米驱油剂体系的制备与性能评价

Preparation and Performance Evaluation of Biological Nano-oil Displacement Agent System

为了实现油田的绿色高效开发,通过芽孢杆菌3096-3(Bacillus sp. 3096-3)代谢产物脂肽类表面活性剂与希瓦氏菌CD-8(Shewanella sp. CD-8)还原产物纳米铁颗粒进行复配,形成一种绿色、环保、高效的新型生物纳米驱油体系。通过液相色谱-质谱分析(HPLC-MS/MS)、红外吸收光谱分析(FT-IR)、X射线粉晶衍射仪(XRD)、和扫描电子显微镜(SEM)、粒径与Zeta电位分析等方法对菌株的代谢产物、还原产物以及复配体系的分散稳定性进行了表征,并探究了复配体系的乳化性能与提高采收率的能力。实验结果表明,由脂肽类生物表面活性剂和纳米铁颗粒复配而成的生物纳米驱油剂体系具有良好的分散稳定性,乳化性能与纳米铁颗粒浓度呈正相关关系;在实验条件范围内,渗吸采收率随纳米颗粒浓度与温度的升高而增加,在温度为70℃下纳米铁颗粒浓度为100 mg/L时的生物纳米驱油剂体系渗吸采收率最高可达56.80%,渗吸采收率效果优于单一的生物表面活性剂与纳米铁流体。所研制的生物纳米驱油剂体系为油田的绿色开发提供了一种可行性的方法。

In order to achieve green and efficient development of oil fields,a green,environmentally friendly and efficient biological nano-oil displacement system was prepared through combining the metabolites of Bacillus sp.3096-3 with the reduction products of Shewanella sp.CD-8.The metabolites,reduction products and dispersion stability of the compound system were characterized by liquid chromatography-mass spectrometry(HPLC-MS/MS),infrared absorption spectroscopy(FT-IR),X-ray powder diffraction(XRD),scanning electron microscopy(SEM),particle size and Zeta potential analysis,and the emulsificationperformance and enhanced oil recovery ability were explored. The results showed that the bio-nano oil displacement agent systemcomposed of lipopeptide biosurfactants and nano-iron particles had good dispersion stability,and the emulsification performancewas positively correlated with the concentration of nano-iron particles. In the range of experimental conditions,the recovery rateincreased with the increase of concentration of nano-iron particles and temperature,and the maximum recovery rate could reach upto 56.80% at the temperature 70 ℃ when the concentration of nano-iron particles was 100 mg/L. The recovery effect of bio-nano oildisplacement agent system was better than that of single biosurfactant and nano-iron fluid. The prepared bio-nano oil displacementagent system provides a feasible method for the green development of oil fields.