محاسبه مقدار نشر گاز متان در اثر سوزاندن گازهاي سرچاهي در فلر (مطالعه موردي)

Calculation of Methane Gas Emissions in Wellhead Gas Flaring (Case Study)

سالانه حجم بالايي از گازهاي همراه نفت ايران د ر فلرها سوزاند ه مي شود . فلرينگ بر كيفيت هوا تاثير مي گذارد زيرا د ر حد ود 250 نوع ماده سمي را د ر اتمسفر رها مي كند . د ر واحد هاي بهره برد اري نفت و گاز، به دلايل مختلف، مقد ار زياد ي گاز به محيط تخليه مي شود كه سهم گاز متان به عنوان د ومين عامل تشكيل دهنده گازهاي گلخانه اي بسيار زياد است. از آنجايي كه ايستگا ه هاي تقويت فشار گاز، پتانسيل بالايي براي نشر آلايند ه د ارند ،هر گونه پيشگيري از اتلاف گاز درآنها تاثير قابل توجهي از لحاظ زيست محيطي و اقتصاد ي خواهد داشت. د ر اين مقاله، با مطالعه يكي از واحد هاي تقويت فشار گازهاي همراه نفت د ر گچساران و شبيه سازي كامل آن با نرم افزار HYSYS و Flarenet ، مشخص شد روزانه 31 / 31 تن گاز متان به دليل بازدهي كم فلر مورد مطالعه، به صورت نسوخته د ر اتمسفر رها مي شود

High volumes of associated gas have been flaring annually in Iran. Base on studies, flaring effects on the air quality with 250 toxic substances releasing to the atmosphere. In oil and gas production units a lot of gases discharge to the environment. The amount of methane gas contribution which is known as the second important greenhouse gas, is too much. The compressor stations, as a most important part of gas transportation, have a major potential to waste gas emissions. Prevention gas releasing in compressor station has significant effect in terms of environmental and economic benefit. We studied one of the associated gas compressor stations in Gachsaran field and simulated completely with HYSYS and Flarenet softwares for checking and calculating the amount of methane that releases to the atmosphere. The results show that about 31.31 tons of methane is transferred to the atmosphere each day due to the low efficiency of combustion.