内外源微生物复合吞吐技术在常规稠油低效井中的研究与应用  

Research and application of indigenous and exogenous microbial compound huff & puff technique in conventional heavy oil low-efficiency wells

作　　者：宋永亭[1] 李彩风[1] 曹嫣镔[1] 孙刚正 吴晓玲[1] SONG Yongting;LI Caifeng;CAO Yanbin;SUN Gangzheng;WU Xiaoling(Research Institute of Petroleum Engineering,Shengli Oilfield Company,SINOPEC,Dongying 257000,Shandong,China)

机构地区：[1]中国石化胜利油田分公司石油工程技术研究院

出　　处：《石油钻采工艺》2018年第3期400-404,共5页Oil Drilling & Production Technology

基　　金：国家高技术研究发展计划(863计划)"中高温油藏微生物驱油技术研究"(编号:2013AA064401)

摘　　要：微生物单井吞吐可以有效提高稠油低效井产能,为了强化微生物作用效果,对内外源微生物进行综合研究。利用激活剂体系(糖蜜3 g/L,玉米浆2 g/L,硝酸钠1.5 g/L,磷酸氢二钾1.2 g/L,磷酸二氢钾1 g/L)对地层水进行内源微生物激活,添加嗜热脂肪地芽孢杆菌SL-1进行细菌浓度和乳化能力研究,利用微生物复合吞吐技术对稠油低效井进行单井处理。结果表明,内源微生物被有效激活,细菌浓度峰值为5×108个/mL,乳化指数最高可达95%,产气量最高达260 mL;相比单纯激活内源微生物,添加外源菌后细菌浓度由2×10~8个/mL增加至9×10~8个/mL,乳化指数峰值时间由20 d缩短至15 d。GO7-53X145井和SJSH14-8井取得了显著增油降水效果,为微生物吞吐技术的应用提供了一种新思路。Microbiological single-well huff and puff may effectively improve the productivity of heavy oil low-efficiency wells.In order to strengthen the microbial action effect,comprehensive study on the indigenous and exogenous microbes were carried out.Indigenous microbes were activated for formation water by using activating agent system(molasses 3 g/L,corn steep liquor 2 g/L,sodium nitrate 1.5 g/L,dipotassium hydrogen phosphate 1.2 g/L,potassium dihydrogen phosphate 1 g/L).Research on bacterial concentration and emulsifying capacity were carried out by adding geobacillus stearothermophilus SL-1.Microbial compound huff and puff technique was used for the single-well treatment of heavy oil low-efficiency wells.The results show that indigenous microbes are activated effectively with the bacterial concentration peak of 5×108 cfu/mL and maximum emulsion index of 95%and the gas production is up to 260mL.Compared with pure activation of indigenous microbes,the bacterial concentration is increased from 2×108 cfu/mL to 9×108 cfu/mL and emulsion index peak time is shortened from 20 d to 15 d after adding exogenous microbes.Both well GO7-53X145 and SJSH14-8 have achieved remarkable effects of increasing oil and decreasing water and provided a new idea for the application of microbial huff and puff technique.

关 键 词：内源微生物 外源微生物 乳化活性 生物气 单井吞吐 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程]