稠油降黏菌的性能评价及现场应用  

Performance Evaluation and Field Application of Heavy Oil Viscosity-reducing Bacteria

作　　者：乐世豪[1] 范振中[1] 刘庆旺[1] 刘雪莲[2] 

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]中石油大庆油田有限责任公司第二采油厂,黑龙江大庆163414

出　　处：《石油天然气学报》2014年第5期128-131,8,共4页Journal of Oil and Gas Technology

基　　金：黑龙江省教育厅科学技术研究项目(12531064)

摘　　要：筛选了2株稠油降黏菌分别为地衣芽孢杆菌（TY1）和枯草芽孢杆菌（TY2）,分别对其作用稠油前后的降黏效果、蜡和胶质的质量分数、族组成、烃组分等参数进行了性能评价。检测结果表明,经2种微生物作用后稠油运动黏度分别下降46.81%和60.13%;密度值下降,平均分子质量由作用前的752.3g/mol分别下降到617.5g/mol和641.5g/mol;凝固点下降了2℃;蜡的质量分数平均增加3.5%,胶质的质量分数平均增加4.3%;族组成中饱和烃质量分数分别增加4.4%和2.5%,沥青质的质量分数分别降低了0.5%和1.3%;初馏点分别降低到140℃和160℃。通过现场3口井应用,平均单井增油达到117t,有效期为50~120d,投入产出比大于1∶3。Two heavy oil viscosity-reducing bacterial strains such bacillus licheniformis TY1 and bacillus subtilis TY2 were screened. Performance of its viscosity reduction effect,wax and gum content,group composition,total hydrocarbon composition was evaluated respectively before and after bacterial treatment. The results showed that after bacterial treatment,the kinematic viscosity of heavy oil decreased 46. 81% and 60. 13% respectively for the 2 bacterial strains and density was reduced also,molecular weight was reduced from 752. 3g /mol to 617. 5 ~ 641. 5g /mol,freezing point decreased by 2℃,asphaltene content in group composition decreased by 0. 5% and 1. 3% respectively,saturated hydrocarbon increased by 4. 4% and 2. 5% respectively,wax and gum increased by 3. 5% and 4. 3% respectively,the initial fraction point was reduced to 140℃ and 160℃. Field application in 3 wells indicate that average oil increment of single well is 117t. The period of validity is 50 ~ 120d and the input-output ratio is more than 1∶ 3.

关 键 词：微生物降黏菌 稠油开采 性能评价 现场应用 

分 类 号：TE345[石油与天然气工程—油气田开发工程]