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Register a new userThe Effect of Nonhydrocarbon Components on the Pseduecritical Properties of Gas Condensate
تأثير المركبات غير الهيدروكربونية على الخصائص شبه الحرجة للمتكثفات الغازية
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تتكون المتكثفات الغازية بشكل أساسي من نوعين من المركبات و هما : مركبات هيدروكربونية و مركبات غير هيدروكربونية تتكون غالباً من CO2 ,H2S,N2,H2O. و بالرغم من أن النسبة التي تشكلها المركبات غير الهيدروكربونية تعتبر صغيرة جداً , إلا أنها تؤثر على العديد من خصائص المتكثفات الغازية. يدرس هذا البحث تأثير هذه المركبات على الضغط شبه الحرج و درجة الحرارة شبه الحرجة للمتكثفات الغازية حيث أن هذه الخصائص تلعب دوراً ىاماً في دراسة السلوك الطوري للمتكثفات الغازية بالاضافة إلى تحديد مجال وقوع الظواهر العكسية التي تحدث في مكامن المتكثفات الغازية .تمت الدراسة من خلال استعراض بعض طرق حساب هذه الخصائص و التصحيحات التي يجب إجراؤها في حال احتواء المتكثفات الغازية على هذه المركبات . تم اعتماد طريقة Stewartt لإجراء الحسابات و وضع برنامج حاسوبي يتم من خلاله حساب الخصائص شبه الحرجة قبل التصحيح و بعده و المقارنة فيما بينها من خلال رسم المنحنيات البيانية التي تربط بين الكسور المولية لهذه المركبات و الضغط شبه الحرج من جهة و درجة الحرارة شبه الحرجة من جهة أخرى .
Gas condensate consists essentionaly of two kinds of compounds: hydrocarbon compounds and nonhydrocarbon compounds such as (CO2, H2S, N2, H2O……..). Nonhydrocarbon compounds form a very small rate in gas condensate ,but it effect on many properties of gas condensate. This research studies the effect of these componentson the pseudocritical pressure and pseudocritical temperature of gas condensate which are very important to study the phase behavioure of gas condensate and to determine the region of retrograde phenomenas which happen in gas condensate reservoirs.The study was done by presenting some methods to calculate these properties and the correcting of these values if there are nonhydrocarbon components in the condensate . the calculations were made by Stewartt methode and we put a computed program to calculate the correcting pseudocritical properties and noncorrecting ones, then we compear the tow values by drawing many diagrams between the mole fraction of the component and the calculated pseudocritical temperature and pressure.
References used
LEE, J & ROBERT,A, 1996-Gas Reservoir Engineering .Wattenbarger
WILLIAM ,D. McCAIN,JR,1990 –The Properties Of Petroleum Fluids
CARCOANA . A ,1992 – Applied Enhanced Oil Recovery
DANESH ,A ,1998 – Pvt and Phase Behaviour Of Petroleum Reservoir Fluids . Elsevier Science & Technology Books. 388p
REV.IFO,Vol.57(2002),No.2,2002 - Oil And Gas Science And Technology
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