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Petrophysics of Kerogens Based on Realistic Structures
1College of Petroleum Engineering and Geosciences, KFUPM, Dhahran 31261, Saudi Arabia.
ACS Omega
|April 19, 2021
Summary
Molecular modeling reveals kerogen type and maturity significantly impact hydrocarbon storage in unconventional reservoirs. Kerogen type III and increased maturity enhance storage capacity, crucial for resource exploration.
Area of Science:
- Petroleum Geoscience
- Computational Chemistry
- Reservoir Engineering
Background:
- Unconventional hydrocarbon production relies on hydraulic fracturing and lateral drilling.
- Understanding hydrocarbon storage and transport within source rocks (kerogens) remains limited.
- Kerogen's petrophysical properties are uncertain due to experimental isolation challenges.
Purpose of the Study:
- To investigate kerogen's petrophysical characteristics using molecular modeling.
- To correlate kerogen type and thermal maturity with storage capacity.
- To model methane adsorption and flow regimes in kerogen nanopores.
Main Methods:
- Computational recreation of kerogen macromolecules (different types and maturities).
- Generation and characterization of nanoporous kerogen structures.
- Delineation of porosity, density, pore size distribution, and adsorption capacity.
Main Results:
- Kerogen properties correlate with type and thermal maturity.
- Kerogen type III exhibited the highest storage capacity, followed by types II and I.
- Increasing maturity generally increased storage capacity within each kerogen type.
Conclusions:
- Molecular modeling provides insights into kerogen's hydrocarbon storage mechanisms.
- Kerogen type and maturity are key factors controlling storage capacity in unconventional reservoirs.
- Findings inform reservoir-scale modeling for enhanced hydrocarbon recovery.
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