Sedimentary reservoir characteristics and reservoir-forming mechanisms in a semi-restricted environment of carbonate ramp: A case study of Lower Cretaceous Yamama Formation in Oilfield A, Central Arabian Basin
October 2026
Based on core, well-logging, well-testing and seismic data, the reservoir characteristics and controlling factors of favorable reservoirs in a semi-restricted environment of carbonate ramp were investigated...
Paradigm shift and perspectives of sedimentary paleogeography research in the digital-intelligence era
October 2026
To systematically examine the paradigm shift of sedimentary paleogeography research driven by artificial intelligence, and clarify the technical integration pathways and core challenges, this study...
Structural characteristics, evolution and exploration potential of Awati Sag, Tarim Basin, NW China
October 2026
Based on seismic, drilling and outcrop data, fault geometry-kinematics analysis and balanced-section restoration were used to define the geological architecture and boundaries of the Awati Sag in Northern...
Key factors coupling within integrated source-to-sink systems of coarse- to fine-grained clastic sediments
October 2026
The concept of integrated source-to-sink system (IS2S) is proposed to integrate fine-grained (smaller than 62.5 μm) clastic sediments into the source-to-sink system, break the traditional theoretical...
Rock-breaking and rate-of-penetration improvement mechanisms of hot dry rock under axial-torsional coupled percussion
October 2026
Visualization experiments of axial-torsional coupled percussion (ATCP) drilling in hot dry rock (HDR) were conducted using digital image correlation technique and multiscale characterization method....
Apparent hydrogen diffusion characteristics and sealing performance of typical rocks
October 2026
To reveal the apparent hydrogen diffusion characteristics of typical rocks, their controlling factors, and the sealing performance of different caprocks, a two-chamber gas diffusion apparatus was used...
Physics-constrained intelligent monitoring of liquid loading and early warning of flow cessation in gas wells
October 2026
To address production decline and safety concerns associated with wellbore liquid loading during natural gas production, this study proposes a method integrating physical mechanisms and intelligent...
Pore-scale wettability distribution characteristics of shale reservoirs before and after fracturing: A case study of shale reservoirs in Chang 7 Member of Triassic Yanchang Formation, Ordos Basin, NW China
October 2026
To address the limitation of conventional macroscopic wettability measurements in characterizing pore-scale wettability distributions in shale, a quantitative method for microscopic wettability characterization...
Practical insights from tight oil hydraulic fracturing test site in Xifeng Oilfield, Ordos Basin, China
October 2026
Targeting the continental tight sandstone reservoirs of the Chang 8 Member of the Triassic Yanchang Formation in the Ordos Basin, China, a hydraulic fracturing test site was constructed in the Xifeng...
Genesis of dolomite reservoirs of Ordovician Penglaiba Formation in dome structure of Shunbei area, Tarim Basin, NW China: A case study of Well Shunbeilong 2
October 2026
Focusing on Shunbeilong 2, a well with commercial oil/gas flow from the Ordovician Penglaiba Formation in the dome structure of Shunbei area in the Tarim Basin of China, the drilling, logging, testing...
Formation, distribution, and sedimentary evidence for stratigraphic affiliation of Kalazha Formation in southern margin of Junggar Basin, China
October 2026
This study combines sedimentological analogs with surface and subsurface geological analyses to investigate the Kalazha Formation along the southern margin of the Junggar Basin, China. Outcrops, modern...
Coupling relationship between diagenetic evolution of organo-clay complex and four properties of shale: A case study of Cretaceous Qingshankou Formation shale, northern Songliao Basin, China
October 2026
Taking the shale of Cretaceous Qingshankou Formation in northern Songliao Basin, China, as an example, this study adopts experimental methods including X-ray diffraction analysis, field emission electron...
Strategy, pathway, and significance of integrated development of oil, gas and new energy under carbon neutrality
October 2026
Under the dual constraints of carbon neutrality and energy security, this study systematically examines the background, advantages, pathway and strategic significance of integrated development of oil...
Types, geometric architectures and seismic response characteristics of large-scale dolomite reservoirs: A case study of the Tarim Craton, China
October 2026
Focusing on the Neoproterozoic–Lower Paleozoic dolomite reservoirs in the Tarim Craton, this study constructed a comprehensive geological database encompassing 16 conventional oil and gas fields in...
Construction methodology of large language models and intelligent agents for shale oil
October 2026
To address the requirement for comprehensive analysis of multi-source geological information and intelligent decision-making in shale oil exploration and development, we propose a method for constructing...
Dynamic natural hydrogen accumulation system: Elements, processes and models
October 2026
Natural hydrogen does not need to be prepared artificially and features zero carbon emissions over its entire lifecycle, making it a potential resource for filling the gap in hydrogen supply. However,...
Diagenetic fluids and reservoir-controlling factors of clastic buried-hill reservoirs: A case study of Permian buried-hill in Jiyang Depression, Bohai Bay Basin, China
October 2026
Taking the Permian clastic buried-hill reservoirs in the Jiyang Depression, Bohai Bay Basin, China, as the research object, this study investigates the reservoir characteristics and diagenetic fluid...
Visual silicon tube experiment on interaction between CO2 pre-fracturing fluid and crude oil: A case study of shale oil of Permian Fengcheng Formation in Mahu Sag, Junggar Basin, China
October 2026
Application of CO2 pre-fracturing to displace the shale oil of the Permian Fengcheng Formation in the Mahu Sag of Junggar Basin, China, suffers from gas channeling, asphaltene precipitation, emulsification...
A new model of volume fracturing technology for continental shale oil
October 2026
The current status of volume fracturing technology is reviewed for continental shale oil reservoirs in China. Considering the limited hydraulic fracture propagation and proppant transport under the...
Formation timing of paleo-oil reservoirs and its implications for exploration in Sinian Dengying Formation, central Sichuan Basin, SW China
October 2026
The Sinian Dengying Formation in central Sichuan Basin is characterized by complex hydrocarbon accumulation processes, significant divergences in timing of paleo-oil reservoir formation, and a limited...
Optimum heating window for in-situ conversion process of lacustrine low-to-medium maturity shale oil
October 2026
A commercial breakthrough in the in-situ conversion process (ICP) of lacustrine low-to-medium maturity shale oil requires that the energy output-to-input ratio (Eout/Ein) exceeds the economic threshold....
Elemental fingerprint-based microstructure identification method for deep coal-seam horizontal wells: A case study of No. 8 coal seam of Carboniferous Benxi Formation in Ordos Basin, NW China
August 2026
To address the problem of high-precision microstructure identification in the deep No. 8 coal seam of Carboniferous Benxi Formation in the Ordos Basin, “elemental fingerprints” of the deep coal seam...
Molecular dynamics simulation of helium adsorption-diffusion behavior in nanopores of anthracite from Permian Shanxi Formation in Qinshui Basin, China
August 2026
To understand the occurrence and migration mechanisms of helium in coal-measure gas, this study investigated anthracite from No. 3 coal seam of Lower Permian Shanxi Formation in the Jincheng mining...
A transient and steady state integrated evaluation framework for interwell connectivity in fractured-vuggy reservoirs
August 2026
To address the challenges of uncertain interwell injection-production relationships, high monitoring costs, and limited production data that constrain reliable interwell-connectivity evaluation during...
Hydrocarbon micro-migration characteristics and accumulation model of ultra-deep shale: A case study of Permian Dalong Formation in Well Tiebei 1 L-HF in northeastern Sichuan Basin, SW China
August 2026
The hydrocarbon accumulation patterns of ultra-deep marine shale in the northeastern Sichuan Basin remain unclear. Taking the Permian Dalong Formation in Well Tiebei 1 L-HF in the Puguang area, northeastern...
