تحليل السمات الزلزالية والتركيبية للمكمن الجيري الباليوسيني في حقل بالكاسار، هضبة بوتار، باكستان
DOI:
https://doi.org/10.52716/jprs.v14i1.871الكلمات المفتاحية:
Seismic، reservoir، petroleum geology، carbonatesالملخص
تم إعادة تقييم الخصائص الزلزالية والتركيبية للمكمن الجيري الباليوسيني باستخدام البيانات الزلزالية ثلاثة الابعاد والمتعدد السمات لغرض تحسين التقييم المكمني والذي لم يوثق في الدراسات السابقة. تسلط الدراسة الضوء على عدد من السمات الزلزالية المهمة بعد التكديس لفهم الوضع التركيبي والخصائص الزلزالية لتركيب جيري. تم إجراء التحليل البنيوي باستخدام تفسير البيانات الزلزالية، وذلك بالاشتراك مع تحليل متعدد السمات لتحديد وتكوين نموذج ثلاثي الأبعاد للمساعدة في تحديد البنية التركيبية للحقل. يظهر التفسير التركيبي وجود الصدوع وطية مقعرة غير متناظرة تبين انغلاقاً رباعي الاتجاهات مما يؤكد وجود فعاليات تكتونية انضغاطية. ان قيمة الشذوذ العالية (-6 الى 12) المترافقة مع قيمة RMS بين 23 و 32 تشير الى وجود نقاط ساطعة في المكمن الجيري الباليوسيني ونطاق غاز مشبع، كما ان سمة التباين من 0.05 الى 0.03 تشير الى وجود صدعين رئيسين اما التردد الأقل فيشير الى وجود الهيدروكاربونات. أشار تحليل السمات الى ان الحجر الجيري اللوكارهتي يمتلك إمكانيات مكمنية جيدة وذلك بناءً على قيمة الـ DHI (نقطة ساطعة)، وونطاق تشبع غازي وآلية احتجاز مدعومة بأغلاق تركيبي في المنطقة والذي يساعد في فهم الخزانات الجيرية المماثلة في البيئات الجيولوجية حول العالم.
المراجع
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