نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه صنعت نفت
2 شرکت ملی مناطق نفت خیز جنوب
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Usually, during hydrocarbon production, water is produced along with oil. In tertiary recovery, water flooding is conducted to reduce the pressure drop in the reservoir and increase oil production. Injected water can enter the production well through different pathways. Excess water production occurs when water enters the well more than water oil ratio economic limit. Excess water production is one of the main challenges of the oil and gas industry, which causes many economic and environmental issues. to control excess water production, knowing the source and mechanisms of water production is essential and plays a major role in designing the water shut-off methods. In this review study, the sources and mechanisms of excess water production have been investigated, so that ten mechanisms of excess water production have been reported for two sources: aquifers and injection wells. All kinds of mechanisms have been categorized in terms of water source, nature, and degree of difficulty of water control methods, and their identification methods have been classified in three groups of well logging, tests, and analytical-experimental methods to point and pathway of water entry into the production well and it should be determined accurately. According to the type of mechanisms and sources, various chemical and mechanical methods have been collected to control the entry of water into the well, each can be used in certain conditions. Finally, by identifying the mechanism and pathway of water production and according to the available equipment, technologies and taking into account the conditions of the well and reservoir, a suitable method is chosen to control the production of excess water. By controlling the excessive water production mechanisms of injection well at the same time as reducing water production, improvement of water flooding performance which leads to the areal sweep efficiency will improve, and oil production increase.
کلیدواژهها [English]
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