نوع مقاله : مقاله پژوهشی
نویسندگان
1 پژوهشگر پژوهشکده ازدیاد برداشت پژوهشگاه صنعت نفت
2 پژوهشگاه صنعت نفت، پژوهشکده مطالعات مخزن
3 پژوهنده 1/ پژوهشگاه صنعت نفت
4 ازدیاد برداشت- پژوهشگاه صنعت نفت
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
More than half of the reservoirs in the world are carbonate reservoirs, most of which are fractured. The main controller of fluid flow and production in this kind of reservoirs is fracture. In fractured reservoirs, the water invaded zone is introduced as the zone between the initial and new contact surface of water and oil. In this zone, the fractures are completely saturated with water and surround the matrix blocks containing oil. Due to the pressure drop in these reservoirs compared to the initial pressure and the creation of a water invaded zone, as well as the remaining large volume of oil in the matrix, the necessity of using new methods of increased extraction to enhance the reservoir's efficiency is evident. Considering the inherent complexity of fractured reservoirs and the need for stable production from these reservoirs, choosing the appropriate method for increased harvesting requires numerous studies and simulations. The purpose of this research is to investigate the effect of different the enhancing the oil recovery methods (three methods of increasing extraction of water-based with higher priority of primary screening) on the increase oil production from the water invaded zone and perform the sensitivity analyze on the parameters affecting the production mechanism using the single block model. The obtained results show that the recovery time varies from several tens of years to several hundreds of years, indicating a very low speed of the gravity phenomenon. Considering the above times that are outside the lifetime of the reservoir, water injections methods do not seem economical. Based on the results, the range of increased recovery in the very optimistic case of low salt water injection (100 times diluted sea water) in tertiary injection is from 4.08% to 6.49%. Additionally, the range of increase in surfactant injection recovery in the maximum state (concentration 10,000 ppm) in the tertiary injection method is from zero to 8.13%. In carbonated water injection, the rate of oil recovery increases from 0.47% to 3.6%.
کلیدواژه‌ها [English]
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