Radiogenic geothermal systems of Bangka Island, Indonesia: Implications of high heat production and tectonic framework
October 2024
The presence of geothermal manifestation in Bangka Island (Southeast Sumatra, Indonesia) with the absence of Quaternary volcanic activity and also relatively low seismicity events has raised intriguing...
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Influences of lithofacies on fluid mobility in mixed sedimentary rocks: Insights from NMR analysis of the middle Permian Lucaogou Formation, Junggar Basin
October 2024
The multi-source mixed sedimentation resulted in a unique series of mixed fine-grained sedimentary rocks evolved within the Permian Lucaogou Formation in the Jimusar Sag, located in the southeastern...
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Shale primary porosimetry based on 2D nuclear magnetic resonance of T1-T2
July 2024
Porosity, a key parameter in assessing the physical properties of shale reservoirs and the reserves, is of great significance to the selection and evaluation of shale sweet spots. There are many methods...
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A new method for quantitative evaluation of shale laminae using electrical image logging
July 2024
Shale oil reservoirs are generally characterized by complex mineral compositions, rapid lithofacies changes, and thin laminae. Explorations have confirmed that the type and density of shale laminae...
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Hydrocarbon generation potential of Campano-Maastrichtian to Paleogene shales in the Benin Flank of the Anambra Basin, SW Nigeria
July 2024
The hydrocarbon generation potential of the Campano-Maastrichtian to Paleogene shales from the Benin Flank (located in SW Nigeria) of the Anambra Basin, has been previously investigated mostly by studying...
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Influence of reservoir heterogeneity on immiscible water-alternating-CO2 flooding: A case study
July 2024
Currently, limited studies of immiscible water-alternating-CO2 (imWACO2) flooding focus on the impact of reservoir heterogeneity on reservoir development outcomes. Given this, using the heterogeneous...
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A multi-mineral model for predicting petrophysical properties of complex metamorphic reservoirs: Case study of the Bozhong Depression, Bohai Sea
July 2024
Interpreting reservoir properties through log data and logging responses in complex strata is critical for efficient petroleum exploitation, particularly for metamorphic rocks. However, the unsatisfactory...
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An experimental study on horizontal well waterflooding in the Cretaceous porous carbonate reservoir of Oman
July 2024
Porous carbonate reservoirs, prevalent in the Middle East, are lithologically dominated by bioclastic limestones, exhibiting high porosity, low permeability, intricate pore structure, and strong heterogeneity....
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Log interpretation of carbonate rocks based on petrophysical facies constraints
July 2024
The complex pore structure of carbonate reservoirs hinders the correlation between porosity and permeability. In view of the sedimentation, diagenesis, testing, and production characteristics of carbonate...
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A review of methane leakage from abandoned oil and gas wells: A case study in Lubbock, Texas, within the Permian Basin
July 2024
In the pursuit of global net zero carbon emissions and climate change mitigation, ongoing research into sustainable energy sources and emission control is paramount. This review examines methane leakage...
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Deterministic tools to predict gas assisted gravity drainage recovery factor
July 2024
Naturally fractured rocks contain most of the world's petroleum reserves. This significant amount of oil can be recovered efficiently by gas assisted gravity drainage (GAGD). Although, GAGD is known...
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Organic geochemical, petrographic and palynological characterization of claystones of the Palaeogene Toraja Formation, and oil seeps in the Enrekang Sub-basin, south Sulawesi, Indonesia: Implications for hydrocarbon source rock potential
July 2024
An organic geochemical, petrographical, and palynological evaluation was conducted on 30 claystone outcrop samples of the Toraja Formation, along with a geochemical analysis of an oil seep in the Enrekang...
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Origin of high heat flow in the back-arc basins of Sumatra: An opportunity for geothermal energy development
July 2024
Volcanic arcs such as the Barisan Mountains have been identified as attractive areas for the utilization of geothermal energy, as exemplified by Ulubelu in Lampung and Sarulla in North Sumatra. However,...
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Genetic mechanisms of high-quality tight siliciclastic reservoirs: A case study from the Upper Triassic Xujiahe Formation in the Yuanba area, Sichuan Basin, China
July 2024
This study analyzed the petrological characteristics, diagenesis, pore types, and physical properties of the tight coarse-grained siliciclastic sequences in the third member of the Upper Triassic Xujiahe...
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A log-based method for fine-scale evaluation of lithofacies and its applications to the Gulong shale in the Songliao Basin, Northeast China
July 2024
The Gulong shale demonstrates high clay content and pronounced thin laminations, with limited vertical variability in log curves, complicating lithofacies classification. To comprehend the distribution...
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Sealing capacity evaluation of underground gas storage under intricate geological conditions
July 2024
Evaluating underground gas storage (UGS) sealing capacity is essential for its safe construction and operational efficiency. This involves evaluating both the static sealing capacity of traps during...
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Key geological factors governing sweet spots in the Wufeng-Longmaxi shales of the Sichuan Basin, China
July 2024
Production performance of the Wufeng-Longmaxi shales varies significantly among Fuling, Weirong, and Wulong fields in the Sichuan Basin. Total organic carbon (TOC) content, mineralogy, and organic matter...
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Formation mechanisms and resource potential of carbonate geothermal reservoirs in the Beijing-Tianjin-Hebei plain
July 2024
Investigating the formation mechanisms of carbonate geothermal reservoirs is of theoretical and practical significance for summarizing the formation pattern of geothermal resources and further guiding...
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Paleoenvironment of marine-continental transitional shales in the lower Permian Shanxi formation, southeastern Ordos Basin, China
July 2024
The paleoenvironment of shales can be reconstructed to some extent using the combinations or concentrations of elements that correlate strongly with environmental conditions. In this study, we analyzed...
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Quantitative identification and prediction of mixed lithology, Bohai Sea, China
July 2024
The Paleogene Shahejie Formation in the KL16 oilfield, Bohai bay, is characterized by a thinly interbedded mixed sedimentary system, with complex sedimentary facies, lithologic types and distributions....
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Microscopic characteristics and geological significance of pyrite in shales of the Wufeng-Longmaxi formations, southeastern Chongqing, China
July 2024
Shales of the Wufeng-Longmaxi formations in the basin-margin transition zone of southeastern Chongqing, China are characterized by high organic matter content and a significant presence of pyrite development....
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Gravity tectonics controls on reservoir-scale sandbodies: Insights from 3D seismic geomorphology of the canyons buried in the upper slope of the Eastern Niger delta basin
July 2024
High-resolution 3D seismic data analysis was integrated with a calibrated well and biostratigraphy data to present the first overview of a buried Pleistocene canyon system on the upper slope of the...
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Quantitative analysis on resistant forces at oil-surfactant-rock interfaces with dynamic wettability characterization
July 2024
Adhesion of oil at rock surface plays an important role in the liberation of oil from micro-/nano-pores, especially for heavy oil that has extremely high viscosity. Although molecular dynamics simulation...
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A deep learning framework for suppressing prestack seismic random noise without noise-free labels
July 2024
Random noise attenuation is significant in seismic data processing. Supervised deep learning-based denoising methods have been widely developed and applied in recent years. In practice, it is often...
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Production forecasting methods for different types of gas reservoirs
July 2024
Hydrocarbon production in oil and gas fields generally progresses through stages of production ramp-up, plateau (peak), and decline during field development, with the whole process primarily modeled...
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