As the global energy demand increases, a sustainable and environmentally friendly methane (CH4) extraction technique must be developed to assist in transition off of fossil fuels. In recent years, supercritical carbon dioxide (CO2) has been poised as candidate for enhanced gas recovery (EGR) from CH4-rich source rocks, potentially with reservoir serving sink CO2. However, underlying molecular-s...

By examining wireline data from Woodford and Wolfcamp gas shale, we find that the primary controls on elastic-wave velocity are total porosity, kerogen content, mineralogy. At a fixed both V p s strongly depend clay as well content. Both velocities also strong functions of sum above two components. Even better discrimination elastic properties at porosity is attained if use solid matrix (includ...

• Combining machine learning with NMR spectra to predict the kerogen components and types. Propose a solution convert 2D graph into available form for models. Build an automatic labeling platform generate over 22,000 training samples. The prediction accuracy of indicators in optimal model can achieve 90% total. method has advantages intelligentization, high-throughput prediction, high accuracy....

• As CO 2 pressure increases, kerogen wettability shifts from H O-wet to -wet. crowding near surface at high pressures leads the -wet state. Carbon skeleton favors , resulting in a film formed O-kerogen interface. Geological sequestration (GCS) is an essential building block of global strategy alleviate greenhouse gas emissions and mitigate climate change. Injecting into shale formations can no...

Estimation and correct determination of vitrinite equivalent reflectance in rock is crucial for the assessment source both conventional unconventional hydrocarbon deposits. These parameters can be determined laboratories on samples. Laboratory measurements provide only point information. However, use well logs could overcome discontinuities data throughout a study interval. Attention has been p...