罗801块原油微生物气化物模实验

Gasification of oil microbes' physical simulation experimental study in Luo 801 oil reservoirs

以胜利罗801块为例,在不同调控因素(无机氮源、磷源)作用下,首先通过不同培养时间静态模拟实验,考察所产生气体总量、甲烷绝对量和产气速率,然后进行动态模拟实验.结果表明:随着培养时间延长,各组岩心产生气体总量、甲烷绝对量和产气速率增加,但是增加幅度随着时间延长有所降低,并筛选出2组典型调控配方:第1组,氮源NH4NO3(注入量为0.10 PV),磷源K2HPO4(注入量为0.10 PV),外源纯菌AM-1(注入量为0.25 PV);第2组,氮源不补充,磷源K2HPO4(注入量为0.20 PV),外源混合菌AB-1和AB-2(注入量为0.25 PV).动态模拟实验变化规律与静态模拟实验类似,差别在于静态模拟实验产生气体总量、甲烷绝对量和产气速率比动态模拟实验的高1倍以上,并确定第2组典型调控配方为最佳的调控配方.甲烷产生速率超过20μmol.d-1.g-1,折算成每吨原油年产甲烷量超过150 m3,表明原油微生物气化技术在胜利罗801块具有良好现场应用前景.

Aiming at the characteristics of reservoir environment,specific research reservoir of various physical,chemical and biological factors influence on the influence of crude oil biological gasification process,taking Luo 801 block for example,there are some different factors functioning,such as inorganic nitrogen source and phosphorus source,first by static simulation training generated by different time,investigation of methane gas quantity,the amount of absolute relative methane rate.Experimental results show that,with the training prolonged,each core produces gas absolute and total,methane producing rate is increasing,but the increase rate over time is reduced.Two groups were typical control formula: group 1,inject nitrogen source NH4NO3(0.10 PV),K2HPO4(0.10 PV),exogenous bacteria pure bacteria AM-1(0.25 PV);the second group,nitrogen source do not complement,K2HPO4(0.20 PV),exogenous is mixed bacteria AB-1 and AB-2(0.25 PV).Secondly in static simulation experiment is conducted on the basis of dynamic simulation experiment,the experimental results show that the dynamic simulation experiment change law is similar to static simulation experiment,the difference is the gas gross.The absolute relative amounts of methane gas velocity is 1 times higher.And identify the best control formula,the second group.Methane producing rate is more than 20 μmol·d-1·g-1.Every ton of crude oil is equivalent to producing more than 150 m3 methane every year.Microbial gasification technology has a good application prospect in Luo 801 block.