STUDY OF MECHANICAL PROPERTIES OF KEROGEN BY A MOLECULAR SIMULATION APPROACH

STUDY OF MECHANICAL PROPERTIES OF KEROGEN BY A MOLECULAR SIMULATION APPROACH. Masters thesis, King Fahd University of Petroleum and Minerals.

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Arabic Abstract

الخواص البتروفيزيائية للمواد العضوية الموجودة داخل الصخور الرسوبية الكثيفة يصعب تحليلها بشكل مباشر من خلال الطرق التقليدية نظرا لصعوبة استخلاصها بكميات مناسبة ، عوضا عن ذلك توفر الطرق الغير تقليدية مثل جهاز قياس الصلابة متناهي الدقة وبرامج المحاكاة الجزيئية وسيلة لمعرفة الخواص المختلفة ، بدأ تطوير برامج المحاكاة الجزيئية للمواد العضوية في عام ١٩٦٠ من خلال اعادة تكوين الحزيئيات العضوية واستمر تطويرها خلال السنوات للوصول الى نتائج تعادل ما يتم ملاحظته في التجارب ، هذا البحث يبدأ من خلال إعادة تكوين بعض الجزيئيات العضوية للمواد العضوية في المستوى الثاني الحراري ، بعد ذلك يتم التحكم في خصائصها مثل الكثافة والمسامية وربط ذلك بالخصائص الميكانيكية المختلفة لتحقيق هدف البحث وهو فهم الخصائص الجيوميكانيكية تحت الظروف المختلفة من الضغط والحرارة والتكوين الكيميائي ، نتائج البحث ستسمح بتسليط ضوء أكبر على تحسين تحفيز الانتاج من المكامن البترولية غير التقليدية

English Abstract

Kerogen petrophysical and mechanical properties are difficult to extract through conventional techniques due to length scale limitations. Characterization of kerogen requires the isolation of organic material from the rock matrix. However, separation methods have a high probability of damaging or chemically altering the properties of kerogen. For these reasons, microscopic methods such as Nano-indentation and Atomic Force Microscopy can be implemented to provide in-situ readings. Alternatively, computational modelling and molecular representation of kerogens can be used to simulate the outcomes of experimental work. Starting from 1960s, several analytical studies have been conducted on kerogen structures to obtain representative models on a computational platform. The literature includes various models varying from basic to most advanced ones that were developed with the advancement in computational power. This research implements existing 3D kerogen macromolecules to form kerogen structures that can be analysed for the mechanical behaviour of organic material of type II at different maturity levels. Type II kerogen was selected specifically as the most common organic constituent of shales. Additionally, the underlying factors that could control mechanical behaviour such as the density and porosity are to be investigated. The impacts of different types of pore fluids on mechanical properties are to be presented as well, considering the adsorptive nature of unconventional formations. Finally, the same comprehensive analysis procedure will be applied to the organic matter represented as the mixture of kerogen II-D and asphaltene molecules. The main objective of the research is to investigate the geomechanical behaviour of kerogens and organic material that exist in shale formations following a complete molecular simulation approach. The results are compared with what have been reported following similar methodology and other advanced fine-scale experimental approaches.

Item Type: Thesis (Masters)
Subjects: Earth Sciences
Petroleum
Department: College of Petroleum Engineering and Geosciences > Petroleum Engineering
Committee Advisor: Alafnan, Saad
Committee Members: Mahmoud, Mohamed and Abdulraheem, Abdulazeez
Depositing User: ELSHAD ASLANOV (g201907830)
Date Deposited: 11 Jan 2022 07:57
Last Modified: 11 Jan 2022 07:57
URI: https://eprints.kfupm.edu.sa/id/eprint/142029