Visualization simulation experiments and porosity evolution mechanisms of deep to ultra-deep carbonate reservoirs
April 2025
To address the challenges in studying the pore formation and evolution processes, and unclear preservation mechanisms of deep to ultra-deep carbonate rocks, a high-temperature and high-pressure visualization...
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Source and exploration potential of the ultra-deep Cambrian petroleum in Well XT-1, Tarim Basin, NW China
April 2025
The ultra-deep (deeper than 8 000 m) petroleum in the platform-basin zones of the Tarim Basin has been found mainly in the Lower Paleozoic reservoirs located to the east of the strike-slip fault F5...
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Intelligent evaluation of sandstone rock structure based on a visual large model
April 2025
Existing sandstone rock structure evaluation methods rely on visual inspection, with low efficiency, semi-quantitative analysis of roundness, and inability to perform classified statistics in particle...
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Fracture parameter diagnostic method during staged multi-cluster fracturing based on distributed temperature sensing
April 2025
The Carter model is used to characterize the dynamic behaviors of fracture growth and fracturing fluid leakoff. A thermo-fluid coupling temperature response forward model is built considering the fluid...
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A shut-in pressure calculation method for high-temperature high-pressure wells in deepwater fractured formations based on thermo-hydro-mechanical coupling
April 2025
By comprehensively considering the influences of temperature and pressure on fluid density in high temperature and high pressure (HTHP) wells in deepwater fractured formations and the effects of formation...
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Deformation and migration characteristics of bubbles moving in gas-liquid countercurrent flow in annulus
April 2025
The gas-liquid countercurrent flow pattern is complex and the bubble migration velocity is difficult to predict in the process of bullheading well killing. The experiment on bubble migration in gas-liquid...
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Fluid characteristics, gas accumulation controlling factors and gas enrichment modes in coal reservoirs: A case study of the Upper Paleozoic in the central-eastern Ordos Basin, NW China
April 2025
Based on the test and experimental data from exploration well cores of the Upper Paleozoic in the central-eastern Ordos Basin, combined with structural, burial depth and fluid geochemistry analyses,...
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Equivalent force model of deformation induced by oil and gas reservoir development and its volume boundary element method solution
April 2025
To address the issue that traditional finite element methods cannot fully consider the semi-infinite earth strata and have lower solution accuracy, a new equivalent force model for induced deformation...
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Evaluation of the adaptability of CO2 pre-fracturing to Gulong shale oil reservoirs, Songliao Basin, NE China
April 2025
Based on development practices of Gulong shale oil and a series of experiments on interactions between CO2 and the rocks and fluids of shale oil reservoirs, the application and adaptability of CO2 pre-fracturing...
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Application of the whole petroleum system in the evaluation of the global natural gas hydrate resource
April 2025
Natural gas hydrate (NGH), as a widely recognized clean energy, has shown a significant resource potential. However, due to the lack of a unified evaluation methodology and the difficult determination...
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Main factors controlling unconventional gas enrichment and high production in the first member of Permian Maokou Formation, southeastern Sichuan Basin, SW China
April 2025
Based on the data of drilling, logging, experiment and gas testing in the Nanchuan area, southeastern Sichuan Basin, the hydrocarbon generation potential, gas genesis, occurrence state, migration, preservation...
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Geochemical differences in natural gas of Sinian Dengying Formation on the east and west sides of the Deyang-Anyue rift trough and their genesis, Sichuan Basin, SW China
April 2025
Taking the natural gas reservoirs of the Sinian Dengying Formation on the east and west sides (Gaoshiti-Moxi area and north slope of central Sichuan paleo-uplift on the east; Weiyuan and Well Datan-1...
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Connotation, pathways, and significance of building China into an “energy powerhouse”;
April 2025
By summarizing the characteristics of the global energy structure and China's energy resource endowment, this study analyzes the historical context and opportunities for China to build an “energy powerhouse”;,...
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Technical progress and application of global carbon dioxide capture, utilization and storage cluster
April 2025
By systematically reviewing the development status of global carbon dioxide capture, utilization and storage (CCUS) cluster, and comparing domestic and international CCUS industrial models and successful...
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Data credibility evaluation method for formation water in oil and gas fields and its influencing factors
April 2025
The formation water sample in oil and gas fields may be polluted in processes of testing, trial production, collection, storage, transportation and analysis, making the properties of formation water...
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Coal-rock gas accumulation mechanism and the whole petroleum system of coal measures
February 2025
Coal measures are significant hydrocarbon source rocks and reservoirs in petroliferous basins. Many large gas fields and coalbed methane fields globally are originated from coal-measure source rocks...
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Enrichment conditions and metallogenic model of potassium and lithium resources in the Lower–Middle Triassic, northeastern Sichuan Basin, SW China
February 2025
Wells CXD1 and CX2 have uncovered high-concentration potassium- and lithium- containing brines and substantial layers of halite-type polyhalite potash deposits within the 4th and 5th members of the...
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Oil production characteristics and CO2 storage mechanisms of CO2 flooding in ultra-low permeability sandstone oil reservoirs
February 2025
Using the ultra-low permeability reservoirs in the L block of the Jiangsu oilfield as an example, a series of experiments, including slim tube displacement experiments of CO2-oil system, injection capacity...
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An intelligent separated zone oil production technology based on electromagnetic coupling principle
February 2025
To address the challenges associated with existing separated zone oil production technologies, such as incompatibility with pump inspection operations, short effective working life, and poor communication...
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Adsorption damage mechanism and control of fracturing fluid thickener in deep coal rock
February 2025
Static adsorption and dynamic damage experiments were carried out on typical 8# deep coal rock of the Carboniferous Benxi Formation in the Ordos Basin, NW China, to evaluate the adsorption capacity...
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Experiments on the characteristics of upgrading and viscosity reduction of heavy oil under supercritical water conditions
February 2025
This paper investigates the macroscopic and microscopic characteristics of viscosity reduction and quality improvement of heavy oil in a supercritical water environment through laboratory experiments...
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Formation mechanisms and exploration breakthroughs of new type of shale gas in Cambrian Qiongzhusi Formation, Sichuan Basin, SW China
February 2025
The basic geological characteristics of the Qiongzhusi Formation reservoirs and conditions for shale gas enrichment and high-yield were studied by using methods such as mineral scanning, organic and...
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Mechanisms of fine-grained sedimentation and reservoir characteristics of shale oil in continental freshwater lacustrine basin: A case study from Chang 73 sub-member of Triassic Yanchang Formation in southwestern Ordos Basin, NW China
February 2025
Based on recent advancements in shale oil exploration within the Ordos Basin, this study presents a comprehensive investigation of the paleoenvironment, lithofacies assemblages and distribution, depositional...
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Origin and distribution model of thin dolomite reservoirs in the lower sub-member of Mao 2 Member of Middle Permian Maokou Formation in Wusheng-Tongnan area, Sichuan Basin, SW China
February 2025
This paper discusses the characteristics and formation mechanism of thin dolomite reservoirs in the lower submember of the second member of the Permian Maokou Formation (lower Mao 2 Member) in the Wusheng—Tongnan...
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Control of structure and fluid on ultra-deep fault-controlled carbonate fracture-vug reservoirs in the Tarim Basin, NW China
February 2025
This study comprehensively uses various methods such as production dynamic analysis, fluid inclusion thermometry and carbon-oxygen isotopic compositions testing, based on outcrop, core, well-logging,...
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