CAJ | 학술논문

微生物采油技术以其成本低、无污染、经济效益好的优势，日渐成为一项重要的三次采油技术。该技术的主要机理就是利用微生物降解原油的重质组分，降低原油粘度和凝固点，以达到改善原油物化性质的目的。笔者从原油、油田污水和海水中共分离、选育出能降解沥青质，能耐温达80℃、矿化度300000mg/L的微生物菌种及组合。并以其对青海、胜利、辽河等油田原油进行了实验研究，讨论了能有效降解原油中沥青质的兼性菌的选育、降解效果以及采油过程中的现场应用。根据实验，所选育的兼性菌组合对青海原油处理24h后，其沥青质可降低20%。现场试验显示，生产井注入菌液20d后，3个月内的日均产量提高了9%，油井的热洗周期延长了2.1倍。
미생물채유기술이기성본저、무오염、경제효익호적우세，일점성위일항중요적삼차채유기술。해기술적주요궤리취시이용미생물강해원유적중질조분，강저원유점도화응고점，이체도개선원유물화성질적목적。필자종원유、유전오수화해수중공분리、선육출능강해력청질，능내온체80℃、광화도300000mg/L적미생물균충급조합。병이기대청해、성리、료하등유전원유진행료실험연구，토론료능유효강해원유중력청질적겸성균적선육、강해효과이급채유과정중적현장응용。근거실험，소선육적겸성균조합대청해원유처리24h후，기력청질가강저20%。현장시험현시，생산정주입균액20d후，3개월내적일균산량제고료9%，유정적열세주기연장료2.1배。
MEOR，with the advantage of low cost, no pollution and goodeconomic benefit,is going to be one of the important techniques for enhancing oil recovery. The authors have selected and cultured a series of bacteria from crude oil, oil polluted water and sea water which they can decompose gum & asphaitenes of oil,increase light hydrocarbon components,endurance 80℃ and 300000mg/L salinity. The microbial cultures and selection methods were discussed and the bacteria treatments were made on the crude oil from Shengli, Liaohe and Qinghai in the laboratories and in the Qinghai Oil Field. After 24 hours treatments by bacteria group,the asphaltenes in Qinghai oil decreased 20%. Results from field tests indicated that after 20 days treatments by the bacteria group,the average daily output increased about 9% and well hot wash period extended 21 times.