摘要
在模拟大港油田官 69断块油藏条件下 ,在微观透明仿真蚀刻模型上进行了该断块候选嗜热驱油菌种的驱油实验 ,在孔隙级别考察了微生物驱油机理。模型孔隙最大直径为 80 0 μm ,最小直径为 8μm ,渗透率 0 .3— 0 .6μm2 。由实验观测得到该菌液的驱油机理如下 :①乳化、携带并启动剩余油 ;②剥离油膜 ;③不动生物气的Jamin效应导致液流转向 ,可动生物气泡与粘附的细小油滴一起流动。在非均质透明薄板夹砂模型上进行菌液驱油 ,观察到显著的重力作用 (菌液下移 ,气体上移 )。
The Oil displacing mechanisms at pore level involved in MEOR under the conditions of reservoir at Fault Block Guan 69 in Dagang are investigated by using a thermophilic bacterial species as a candidate for Guan 69 microbial flood programs on transparent etched micromodels. These pore level models are of largest and smallest pore diameters 800 and 8 μm, respectively, and of permeability 0.3-0.6 μm 2 . The temperature of bacteria injection is 30℃ and of cultivation 73℃(the reservoir formation temperature). The oil displacing mechanisms by the bacterial species revealed on the basis of the experimental observations are as follows:① emulsification, carrying and mobilization of the residual oil; ②dibonding and peeling of the adhered oil film;③Jamins effect of stational biologically generated gas leading to fluid diverting and flowing gas bubbles with ting oil droplets. Besides, the notable gravitational displacement of bacterial culture downwards and biological gas upwards is observed in the experiments on thin plate unhomogeneous sand packs.
出处
《油田化学》
CAS
CSCD
北大核心
2001年第3期260-263,共4页
Oilfield Chemistry
基金
1 999年国家自然科学基金资助项目"微生物驱油机理及数值模拟研究"(批号 5 99740 1 4)
关键词
微生物驱油
MEOR
嗜热菌种
微观透明模型
驱油机理
孔隙级
大港官69断块油藏
Microbial Enhanced Oil Recovery
Thermophilic Bacterial Species
Transparent Micromodel
Oil Displacing Mechanisms
Pore Level
Fault Block Guan 69 in Dagang
