砾岩油藏内源微生物驱油动态跟踪与评价

Dynamic tracking and evaluation of endogenous microbial oil displacement in conglomerate reservoir

为了提高微生物驱油过程调控的目的性,利用生化指标监测技术对新疆克拉玛依油田七中区现场油井采出样品中微生物浓度、营养物、产物生成量等参数进行了连续的动态监测,并对油田现场反馈的生产动态数据进行了分析评价.七中区现场试验结果表明：内源菌激活期间,总菌密度增加了10^2-10^3个/mL,烃氧化菌（HOB）密度最高提高10^4个/mL,阶段增油量1.6万t,阶段提高采收率2.3%.增油效果随着烃氧化菌密度的增加而增加,为微生物驱油动态跟踪和效果评价提供了良好的借鉴.

To improve the control of microbial oil displacement process, we used biochemical indicators monitoring technology to monitor the change of microorganism concentration, nutrient utilization and products formation of the samples from Qizhong block of Karamay Oil Fields in Xinjiang. Meanwhile, oil field feedback data were analyzed and evaluated. Field test results show that the cell density of endogenous bacteria was increased by 10^2 to 10^3 cell/mL,the cell density of hydrocarbon oxidizing bacteria（HOB） was increased by 10^4 cell/mL, the stage oil increment was 1. 6× 104 tons, and the oil recovery efficiency increased by 2. 3 % during the period of activating endogenous bacteria.The effect of oil increment was positively correlated with the concentration of HOB. Our findings provide a good reference for microbial oil displacement dynamic tracking and effect evaluation.