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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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一株嗜热脂肪地芽孢杆菌的驱油性能及机理研究*
DOI: 10.3724/SP.J.1145.2015.04053, PP. 1-11
Keywords: 微生物驱油,嗜热脂肪地芽孢杆菌,乳化,驱油机理,驱替实验
Abstract:
针对油藏高温条件下微生物数量较少，驱油机理不够明确的特点。通过菌种筛选的方法，对胜利油田不同区块微生物进行筛选，得到一株能够乳化分散原油的细菌，经鉴定为嗜热脂肪地芽孢杆菌，能够耐受60℃以上的高温并有效生长代谢，代谢产物主要由糖类、脂类和蛋白质组成。利用该菌的培养液、培养后离心的代谢产物及离心后的菌体分别进行了驱油实验，结果表明3种不同的驱替液均能够提高驱替效率，其中培养液能够提高驱替效率11.8%，其他两种驱替液提高驱替效率为4.5%和3%。培养液和培养后离心菌体驱替时岩心压力升高0.5mpa以上，而培养后离心代谢产物驱替过程中压力变化不明显，但是代谢产物能够乳化剥离原油，同样达到提高驱替效率的作用。岩心驱替结束后对岩心内剩余油测定表明，从入口到出口呈现逐渐升高的趋势，证明微生物驱替时不断“推移”、“驱赶”原油的过程。综合实验结果，该微生物具备进一步现场应用的潜力。
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