發(fā)布時(shí)間：2018-03-12 17:00

  本文選題：原油　切入點(diǎn)：微生物降解　出處：《油氣地質(zhì)與采收率》2017年02期 　論文類型：期刊論文

【摘要】：原油厭氧微生物降解是形成稠油與伴生氣藏的主要原因之一。為研究原油厭氧微生物降解形成稠油與伴生氣的過程,以林樊家地區(qū)淺層氣和稠油為研究對象,利用厭氧微生物降解菌群對與研究區(qū)稠油具有相同烴源巖的稀油進(jìn)行原油微生物降解模擬實(shí)驗(yàn)。結(jié)果表明:稀油經(jīng)厭氧微生物降解可以形成稠油,同時(shí)還生成甲烷和二氧化碳,降解248 d平均每克原油能夠生成3 mmol甲烷和0.5 mmol二氧化碳,分析所生成的氣體碳同位素,發(fā)現(xiàn)甲烷δ13C1值為-46.36‰~-45.27‰,二氧化碳δ13C1值為4.24‰~8.5‰,利用碳同位素?cái)?shù)據(jù)計(jì)算出林樊家地區(qū)淺層氣中生物降解氣含量達(dá)69%;原油飽和烴含量由初始的72.77%下降到44.0%,飽和烴含量大幅下降是原油稠化的主要原因。典型生物標(biāo)志物25-降藿烷/藿烷值顯著升高,由0.009上升到0.056,表明原油發(fā)生了嚴(yán)重的生物降解。原油微生物降解模擬實(shí)驗(yàn)可以在室內(nèi)較短時(shí)間內(nèi)模擬完成原油的微生物降解過程。
[Abstract]:Anaerobic microbial degradation of crude oil is one of the main reasons for the formation of heavy oil and associated gas reservoirs. In order to study the process of crude oil anaerobic microbial degradation to form heavy oil and associated gas, the shallow gas and heavy oil in Lifangjia area were studied. The microbial degradation simulation experiment of crude oil with the same hydrocarbon source rock was carried out by anaerobic microbial degradation microflora. The results showed that the thin oil could be degraded by anaerobic microorganism to form heavy oil, and also to produce methane and carbon dioxide. On average, 3 mmol methane and 0.5 mmol carbon dioxide can be produced per gram of crude oil degraded for 248d. The results show that the 未 13C1 value of methane is -46.36 鈥，

本文編號：1602466