驱油微生物营养组分在油藏中的消耗吸附及运移规律研究  

STUDY ON CONSUMPTION,ADSORPTION AND THE MIGRATION LAWS OF NUTRIENT COMPONENTS FOR OIL DISPLACEMENT MICROBES

作　　者：柯从玉[1,2,3] 吴刚[2] 游靖[2] 余吉良[2] 谷溢[2] 朱立国[2] 李青[2] 牟伯中[3] 

机构地区：[1]西安石油大学化学化工学院 [2]华北油田公司采油工程研究院 [3]华东理工大学化学与分子工程学院

出　　处：《钻采工艺》2014年第2期40-43,117,共4页Drilling & Production Technology

基　　金：国家自然科学基金"低品位油藏残余油生物降解转化机制研究"(51174092/E0403);华北油田重大科技项目"宝力格油田驱油微生物场建立与维护配套技术研究及应用"(2011-HB-Z230)资助

摘　　要：基于对宝力格油田整体微生物循环驱过程中产出液的长期跟踪监测发现,从油井产出液中监测到的营养液浓度要远低于对应水井的注入浓度,尤其是葡萄糖的浓度始终检测不到,而且在油井产出液中监测到的微生物数量要比注入井低2个数量级左右。为了弄清楚注入的营养液组分在地层中的运移消耗情况,文章通过室内大型物模驱油实验及现场跟踪监测来深入研究微生物、营养液不同组分及代谢产物在油藏中的消耗、吸附及运移规律,结果发现,注入的葡萄糖在地层中有较强的吸附作用,而且由于代谢很快导致其难以进入到油藏深处,这也是目前制约现场微生物驱油效果的一个重要因素。代谢产物的分析表明葡萄糖主要被微生物代谢为有机酸,而葡萄糖及有机酸浓度对微生物的生长繁殖有着重要影响。氯化铵和磷酸二氢钾在地层中的吸附相对较小,但磷酸根在地层中的运移速度要比铵根慢,而且在pH较高的情况下很容易与地层水中的钙镁离子结合形成沉淀。该研究结果为微驱营养液的优化及注入工艺设计提供了重要的理论依据。Based on the long-term tracking and monitoring for produced fluid of Baolige oilfield during the large-scale microbial enhanced oil recovery,it was found that the concentration of nutrient fluid was very low despite the high concentration of nutrient inpouring,especially for glucose.The concentration of glucose has never been detected from produced fluid,and the amount of microbial is two orders magnitude lower than those of inpouring.To well understand the migration and consumption behavior of nutrition component in formation,the consumption,adsorption and the migration laws of nutrition component and metabolites were studied in oil reservoir by large scale physical model experiment and field tracking and monitoring.The results demonstrated that the adsorption of glucose was relatively strong,and it couldn' t reach the deep reservoir due to its rapid consumption.The metabolites analysis indicated that the glucose was transformed into organic acid,and there was a close relationship between the amount of microorganisms and the concentration change of glucose and organic acid.In addition,the adsorption effect of ammonium chloride and potassium dihydrogen phosphate were relatively small,but the migration speed of phosphate was lower than ammonium.Moreover,the precipitation would be formed with the calcium and magnesium ions at the high pH value.The research results would provide an important theoretical basis for nutrient fluid optimization and oil displacement microbes injection process design.

关 键 词：微生物采油 营养组分运移 现场监测 物模实验 宝力格油田 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]