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Studying the Relationship Between hydrocarbons Saturation and Frequency Domain With Continuous Wavelet Transform (CWT)

دراسة علاقة الإشباع الهيدروكربوني مع تغيرات طيف التردد باستخدام تحويل النبضة المستمر

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 Publication date 2010
  fields Geology
and research's language is العربية
 Created by Shamra Editor




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Low frequency shadows is one of hydrocarbons indicators. It can be detected by means of a time-frequency decomposition which can provide higher frequency resolution at lower frequencies and higher time resolution at higher frequencies. This is desirable for analyzing seismic data, because the hydrocarbons in reservoir are diagnostic at lower frequencies. we have carried out such analyses with post-stack data sets on Fahda field which is located in Aleppo uplift, it contains oil. Adding a frequency axis to a 2D seismic section makes the data 3D axis. The comparison of the single frequency sections from such 3D volume can be utilized to detect low frequency shadows. A preferentially illuminated single frequency section at lower frequencies from Fahda field, shows high amplitude low frequency anomalies beneath oil zones. These anomalies disappear at higher frequencies.


Artificial intelligence review:
Research summary
تدرس هذه الورقة العلاقة بين تشبع الهيدروكربونات والمجال الترددي باستخدام تحويل المويجات المستمر (CWT). تُعتبر الظلال ذات التردد المنخفض واحدة من مؤشرات الهيدروكربونات، ويمكن اكتشافها من خلال تحليل التردد الزمني الذي يوفر دقة ترددية أعلى عند الترددات المنخفضة ودقة زمنية أعلى عند الترددات العالية. هذا التحليل مفيد في تحليل بيانات الزلازل، حيث تكون الهيدروكربونات في الخزان التشخيصي عند الترددات المنخفضة. تم إجراء هذه التحليلات باستخدام مجموعات بيانات ما بعد التكديس في حقل فهدة الواقع في ارتفاع حلب، والذي يحتوي على النفط. بإضافة محور التردد إلى مقطع زلزالي ثنائي الأبعاد، تصبح البيانات ثلاثية الأبعاد. يمكن استخدام مقارنة المقاطع الترددية الفردية من هذا الحجم ثلاثي الأبعاد لاكتشاف الظلال ذات التردد المنخفض. تظهر المقاطع الترددية الفردية المضيئة بشكل تفضيلي عند الترددات المنخفضة من حقل فهدة شذوذات ذات سعة عالية وتردد منخفض تحت مناطق النفط. هذه الشذوذات تختفي عند الترددات العالية.
Critical review
دراسة نقدية: تعتبر هذه الورقة مساهمة قيمة في مجال استكشاف الهيدروكربونات باستخدام تقنيات تحليل التردد الزمني. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، لم يتم توضيح كيفية اختيار الترددات المحددة للتحليل بشكل كافٍ، مما قد يؤثر على دقة النتائج. ثانياً، كان من الممكن تقديم مقارنة مع تقنيات أخرى مشابهة لتوضيح مزايا وعيوب استخدام تحويل المويجات المستمر بشكل أفضل. أخيراً، كان من الممكن تضمين المزيد من البيانات الميدانية لدعم النتائج المقدمة في الدراسة.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو دراسة العلاقة بين تشبع الهيدروكربونات والمجال الترددي باستخدام تحويل المويجات المستمر (CWT) لاكتشاف الظلال ذات التردد المنخفض كمؤشر للهيدروكربونات.

  2. ما هي البيانات التي تم استخدامها في التحليل؟

    تم استخدام مجموعات بيانات ما بعد التكديس من حقل فهدة الواقع في ارتفاع حلب، والذي يحتوي على النفط.

  3. ما هي الفائدة من إضافة محور التردد إلى المقطع الزلزالي؟

    إضافة محور التردد إلى المقطع الزلزالي يجعل البيانات ثلاثية الأبعاد، مما يساعد في اكتشاف الظلال ذات التردد المنخفض بشكل أكثر دقة.

  4. ما هي الشذوذات التي تم اكتشافها في حقل فهدة؟

    تم اكتشاف شذوذات ذات سعة عالية وتردد منخفض تحت مناطق النفط، وهذه الشذوذات تختفي عند الترددات العالية.


References used
Addison, P. S. (2002). The illustrated wavelet transform handbook, London, UK
Castagna, J. Anno, P and Taner et al., (2005). Spectral Decomposition of Seismic Data with Continuous Wavelet Transform, School of Geology and Geophysics, University of Oklahoma,U.S.A. Phil Anno
Iske, A; Randen, T. (2005). Mathematical methods and modelling in hydrocarbon exploration and production. University of Leicester, Department of Mathematics, United Kingdom. Avner Friedman
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