کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1754737 1522808 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of spore forming bacterial flooding for enhanced oil recovery in a North Sea chalk Reservoir
ترجمه فارسی عنوان
بررسی سیلاب های باکتریایی تشکیل اسپور برای بهبود بازیابی روغن در یک مخزن گلی در دریای شمال
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی


• Experimental microbial flooding experiments have been carried out.
• The role of microbial selective plugging has been investigated by core flooding.
• Core flooding was done with homogeneous and heterogeneous chalk cores.
• Additional oil 1.0–2.3% was recovered in homogenous reservoir chalk cores.
• Additional oil 6.9–8.8% was recovered in heterogeneous reservoir chalk cores.

Little has been done to study microbial enhanced oil recovery (MEOR) in chalk reservoirs. The present study focuses on core flooding experiments designed to see microbial plugging and its effect on oil recovery. A pressure tapped core holder was used for this purpose. A spore forming bacteria Bacillus licheniformis 421 was used as it was shown to be a good candidate in a previous study. Bacterial spore can penetrate deeper into the chalk rock, squeezing through the pore throats. Our results showed that injection of B. licheniformis 421 as a tertiary oil recovery method, in the residual oil saturation state, was able to produce additionally 1.0–2.3% original oil in place (OOIP) in homogeneous cores and 6.9–8.8% OOIP in heterogeneous cores. In addition, the pressure gradient was much higher in the heterogeneous cores, which confirms that bacterial selective plugging plays an important role in higher oil production from the heterogeneous chalk rock. In all cases, an incubation period (‘shut-in’) after the bacterial and/or nutrient injection was needed to give sufficient time for the bacteria to grow inside the core and to produce more oil. Our findings show potential application of bacteria as a plugging agent in heterogeneous chalk cores to improve oil production.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 133, September 2015, Pages 444–454
نویسندگان
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