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科技导报  2015 

龙虎泡油田微生物驱油评价实验

DOI: 10.3981/j.issn.1000-7857.2015.09.008, PP. 50-53

Keywords: 微生物采油,性能评价,气相色谱,物模实验

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Abstract:

为了在大庆龙虎泡油田应用微生物采油技术,进行室内评价实验。从龙虎泡油田地层水中筛选到一株内源菌DH8,经鉴定为Geobacillusstearothermophilus,另外从菌种库中挑选一株适合该油藏条件生长的外源菌SL21,经鉴定为Bacilluslicheniformis。室内对DH8和SL21的乳化性能、降解能力和驱油效率进行了评价。研究发现,菌株DH8和SL21发酵液的比毛管数分别为0.0239s/m和0.0332s/m;菌株DH8和SL21分别使原油黏度降低19.02%和26.08%;气相色谱分析表明菌株DH8主要降解C13~C27内正构烷烃,而菌株SL21主要降解C19~C37内正构烷烃,经DH8和SL21降解后,C13之前烷烃含量占比分别增加了5.33%和11.00%;物模实验表明,菌株SL21和菌株DH8的驱油效率分别为7.11%和5.50%。综合分析得出外源菌SL21的各项驱油性能指标均优于内源菌DH8。

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