التداخل بين التوتر السطحي البيني وتبللية الصخور وانتقال أنظمة القوى على الااستخلاص الكيميائي المحسّن للنفط: منهجية تشخيصية آلية قائمة على نسبة الاستخلاص بين الامتصاص التلقائي و الامتصاص القسري
محتوى المقالة الرئيسي
الملخص
على الرغم من الدور المحوري لاستخلاص النفط المعزز (EOR) في تلبية الطلب المتزايد على الطاقة، إلا أن تفسير أداء الاستخلاص الكيميائي المعزز يكون محدودٌ بسبب الاعتماد على بيانات التوتر السطحي وزاوية التلامس. تربط معظم الدراسات التوتر السطحي وزاوية التلامس بنتائج حقن السوائل في اللب، مما يحجب تأثير قوى الشعرية والجاذبية. تقدم هذه الدراسة منهجية لعزل القوى من خلال الاستخلاص المتحكم فيه لتميز بين القوة الشعرية واللزوجة والجاذبية، وذلك من خلال الجمع بين تجارب الامتصاص التلقائي والامتصاص القسري التي أُجريت على عينات لبية من حجر رملي بانديرا غراي غني بالطين. يتمثل الابتكار الرئيسي في خلية أموت المعدلة التي تطبق ضغوطًا هيدروليكية مضبوطة (10-30 سم) أثناء تجربة الامتصاص القسري، مما يسمح بقياس أدنى ضغط لتحفيز إزاحة النفط في كل نظام سائل. تم اختيار أربعة أنظمة حقن (محلول ملحي عالي الملوحة (HS)، ومحلول ملحي منخفض الملوحة (LS)، ومادة خافضة للتوتر السطحي (أنيونية كبريتات لوريل الصوديوم SLS) ومادة خافضة للتوتر السطحي (كاتيونية بروميد سيتيل تريميثيل الأمونيومCTAB ) لتحفيز ظروف التفاعل البيني. يُولّد محلول SLS ضغطًا شعريًا عاليًا وزاوية تلامس شبه معدومة، مما يُعزز الاستخلاص بالامتصاص القسري (بسبب قوة اللزوجة) مدعوما بالخاصية الشعرية عند أدنى عتبة ضغط، محققًا استخلاص بنسبة 41% (بسبب الامتصاص التلقائي) ونسبة الاستخلاص بواسطة الامتصاص التلقائي الى الاستخلاص بواسطة الامتصاص القسري (SI/FI) تبلغ حوالي 80%. في المقابل، يُنتج بروميد CTAB توترًا بينيًا منخفضًا ولكن ضغطًا شعريًا غير كافٍ، مما يؤدي إلى استخلاص بواسطة الامتصاص التلقائي نتيجة لقوة الجاذبية بنسبة 5% اما الاستخلاص بالامتصاص القسري فيكون نتيجة لقوة اللزوجة، و ونسبة الاستخلاص بواسطة الامتصاص التلقائي الى الاستخلاص بواسطة الامتصاص القسري (SI/FI) تبلغ حوالي 9%. تُظهر أنظمة المحلول الملحي استخلاص بواسطة القوة الشعرية مدعومة بقوة اللزوجة، مما يتطلب أعلى ضغط دخول للمسامات. تُصنّف نسبة (SI/FI) أنظمة القوى، مؤكدةً أن القوة الشعرية تتحكم في حركة السوائل في ظل ظروف الامتصاص التلقائي و الامتصاص القسري. يوفر هذا النهج القائم على أنظمة القوى أساسًا أكثر موثوقية لتصميم تركيبات CEOR مقارنةً بفحص التوتر السطحي وزاوية التلامس وحدهما.
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تفاصيل المقالة
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