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| 注采水样微生物群落与高凝原油的相互作用 |
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何延龙1,张凡2,柴陆军2,蒲春生1,董浩3,韩春春4,佘跃惠4
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(1.中国石油大学石油工程学院,山东青岛 266580;2.中国地质大学能源学院,北京 100083;3.中国石油大学化学工程学院,北京 102249;4.长江大学化学与环境工程学院,荆州湖北 434023)
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| 摘要: |
| 在高凝油藏开发过程中,原油易在孔隙中析蜡、发生胶质和沥青质沉积等。研究不同水驱环境中内源微生物群落及其与高凝油的相互作用关系,以河南魏岗油田高凝油藏产出水样为研究对象,优选最佳激活体系;通过微生物驱油物理模拟实验考察内源微生物提高采收率情况,研究激活前后内源微生物的群落变化以及原油组分、性质的变化。结果表明:注采水样中微生物群落差异明显,内源微生物被激活后优势菌为芽胞杆菌(Bacillus sp)和梭菌(Clostridium ultunense)等,原油乳化分散等级最高可达5级,微生物提高采收率最高为12.51％;凝点最多降低5 ℃,蜡含量降低3.95％以上,同时多环芳烃萘、菲及其同系物等降解较为明显;不同水驱环境中内源微生物在驱油、原油降解等过程中发挥着重要的作用。 |
| 关键词: 注采水 原油降解 色谱质谱联用 气相色谱 物理模拟 |
| DOI：10.3969/j.issn.1673-5005.2015.04.018 |
| 分类号::TE 357 |
| 基金项目:国家“863”重大项目(2006AA06Z204);国家自然科学基金项目(50974022,9,51104173) |
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| Interaction between high-wax crude oil and the microorganism inhabiting injection and production water |
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HE Yanlong1, ZHANG Fan2, CHAI Lujun2, PU Chunsheng1, DONG Hao3, HAN Chunchun4, SHE Yuehui4
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(1.School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China;2.School of Energy Resources in China University of Geosciences, Beijing 100083, China;3.College of Chemical Engineering in China University of Petroleum, Beijing 102249, China;4.College of Chemistry and Environmental Engineering in Yangtze University, Jingzhou 434023, China)
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| Abstract: |
| The wax, resin, and asphaltene in the high-wax crude oil can be easily precipitated in the pores during the development of this crude oil. The interaction between the indigenous microorganisms in different water floodings and high-wax crude oil was investigated. The injection and production water was collected from Weigang Oilfield (Henan) and the activation system was optimized. The oil recovery enhancement with the indigenous microbe was studied using physical simulation experiment of oil displacement by microorganism. And the changes of the microbial community, as well as the composition and properties of crude oil before and after activation were characterized. It is found that the difference of the microbial community in injection and production water is significant. The dominant bacteria after activation in indigenous microbe are Bacillus sp and Clostridium ultunense. The dispersion grade of the oil emulsion is reached up to 5. And the enhanced oil recovery by microbe is increased up to 12.51％. The freezing point of the oil is reduced down to 5 ℃, and the wax content is decreased more than 3.95％. Meanwhile, the degradation of naphthalene, phenanthrene and its homologue in crude oil is pronounced. The indigenous microbes in different water floodings play an important role of oil recovery and oil degradation. |
| Key words: injection and production water oil degradation GC/MS gas chromatography physical simulation |
