Abstract The Piedemonte Llanero Basin is located on the eastern side of Eastern Cordillera Colombian Andes. It has been subject numerous geological studies carried out for oil sector, mainly. This study presents coal-petrographical features 15 coal seams four formations from Late Cretaceous to Middle Miocene (Chipaque formation, Palmichal group, Arcillas del Limbo and San Fernando formation). A...

In order to explore the graphitization characteristic differences between vitrinite and inertinite in coal, this study conducted high-temperature thermal simulation experiments (at five temperature points: 1800°C, 2100°C, 2400°C, 2700°C, 3000°C) using inertinite-rich vitrinite-rich samples as precursors. The quantitative comparison for evolution characteristics of their graphite lattice was car...

Underground coal gasification (UCG) is a conversion method that permits resources to be exploited in situ using high-temperature reactions. An understanding of the chemical, mineralogical, and petrographic properties coal, resultant unburned carbon, degasified ash (minerals) UCG zone, fundamental determining rates, gas composition, environmental groundwater risk assessments. This study aims pro...

China hosts rich shale gas resources. The Longmaxi Formation (LF) in the Sichuan Basin is one of important regions for exploration and extraction. Here, we investigate pore structure factors influencing gas-bearing characteristics pores reservoirs LF. We employed scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), content testing, saturation testing based on nuclear magnetic r...

Qilian Mountain is the only permafrost area in China where natural gas hydrates have been obtained through scientific drilling. Many studies performed on regions from perspectives of sedimentology and petroleum geochemistry, especially reservoir forming conditions exploration methods. However, there are still more divergences its evolutionary process, time, accumulation mechanism. In this study...

Marine-continental transitional shale, as an important shale type, gains less attention than marine and continental which restricts the exploration development process of marine-continental gas. In this study, Upper Permian Longtan Formation in southern Sichuan Basin was taken research object, organic matter characteristics, hydrocarbon generation ability, mineral composition, physical properti...

The composition of oil trapped in fluid inclusions (FI), occurring mineral cements, can provide valuable insights into migration. Here, FI oils a calcite vein (representing expelled fluids) and source rock (SR) extracts retained bitumen) from the Hosszúhetény Calcareous Marl Formation (HCMF) Mecsek Mountains area Hungary were investigated to assess how organic compounds are fractionated during ...

The Mesozoic Chang 8 Section in the Zhenjing area is a typical low permeability-tight sand reservoir and regarded as most important set of paybeds study area. Guided by principles basic geological theory, diagenetic evolution process hydrocarbon accumulation periods were determined through various techniques. More specifically, core observation, scanning electron microscopy (SEM), X-ray diffrac...

This paper focuses on determining total organic carbon (TOC) from boreholes in the Kalahari Basin, Botswana, using Passey's method. The Karoo basin is one of several basins southern Africa filled with Late Carboniferous to Jurassic sedimentary strata that host Permian age coal seams. Nine exploration (wells) drilled central are used determine Total Organic Carbon potential. Vitrinite reflectanc...

This study performs a comprehensive comparison of three key marine shale reservoirs in the southeastern margin of the Sichuan Basin, and explains why commercial gas production was only achieved in the Lower Silurian Longmaxi (LSL) and Upper Ordovician Wufeng (UOW) formations, but not in the Lower Cambrian Niutitang (LCN) formation. The experimental methods included in situ gas content and gas c...