Pore network modeling of gas–water two-phase flow in deformed multi-scale fracture-porous media
May 2025
Two actual rocks drilled from a typical ultra-deep hydrocarbon reservoir in the Tarim Basin are selected to conduct in-situ stress-loading micro-focus CT scanning experiments. The gray images of rock...
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Hydrocarbon generation reaction kinetics study on supercritical water conversion of centimeter sized medium and low maturity organic-rich shale
May 2025
Accurate prediction of the composition of pyrolysis products is the prerequisite for achieving directional regulation of organic-rich shale pyrolysis and conversion products. In this paper, the classical...
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Evolution of multi-cluster fracturing in high-density layered shale considering the effect of injection scheme
May 2025
Shale oil reservoir is generally characterized by well-developed bedding planes, and multi-cluster fracturing is the most effective technique to achieve stable shale oil production. In this paper, a...
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Numerical simulation of vortex-induced vibration of deepwater drilling riser based on discrete vortex method
May 2025
Deepwater drilling riser is the key equipment connecting the subsea wellhead and floating drilling platform. Due to complex marine environment, vortex-induced vibration (VIV) will be generated on riser,...
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Dynamic characteristics of anisotropic shale and rock-breaking efficiency of the axe-shaped tooth under different impact load-bedding angles
May 2025
Percussion drilling technology can be used to increase the rate of penetration in deep shale reservoirs, but the interaction mechanism among impact loads, drilling teeth and rock has not been sufficiently...
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An EDCC-EMD analysis-based network for DAS VSP data denoising in frequency domain
May 2025
Distributed acoustic sensing (DAS) has rapidly emerged as a transformative technology in seismic exploration, particularly in vertical seismic profiles (VSP). However, the acquired VSP data suffer from...
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Study on the performance variation and failure mechanism of natural gas pipeline under the action of water failure
May 2025
Water-induced disasters in long-distance pipelines are prevalent geological hazards, characterized by their frequency and widespread distribution. The complexity of factors contributing to pipeline...
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Molecular dynamics insights into wax formation—How polymeric inhibitors shape crude oil flow
May 2025
Molecular-level interactions between polymeric inhibitors and wax crystals are essential for mitigating wax deposition in crude oils, a major operational and environmental challenge. This study investigates...
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Hydrothermal carbon nanospheres as environmentally friendly, sustainable and versatile additives for water-based drilling fluids
May 2025
In this study, hydrothermal carbon nanospheres (HCNs) were prepared by hydrothermal carbonization using glucose as the precursor, and introduced to improve the properties of water-based drilling fluid...
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Sequence stratigraphy and sedimentary evolution from Late Cretaceous to Quaternary in the Romney 3D seismic area, deep-water Taranaki Basin (New Zealand)
May 2025
The study of sequence stratigraphy often focuses on shallow marine and shelf-edge regions, while research on deep-sea stratigraphic sequences remains relatively weak. This study, based on high-resolution...
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A novel logging method for detecting highly resistive formations in oil-based mud using high-frequency electrodes
May 2025
The oil-based mud (OBM) borehole measurement environment presents significant limitations on the application of existing electrical logging instruments in high-resistance formations. In this paper,...
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Investigating petrophysical properties of gas hydrate-bearing sediments using digital rock technology: A microscopic perspective
May 2025
Natural gas hydrates are crystalline solid complexes with different morphologies found in marine sediments and permafrost zones. The petrophysical properties of gas hydrate-bearing sediments (GHBS)...
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Response characteristics of shear waves scattered by fractures with borehole observation system
May 2025
Fractures play a crucial role in various fields such as hydrocarbon exploration, groundwater resources management, and earthquake research. The determination of fracture location and the estimation...
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Advanced development of chemical inhibitors in water-based drilling fluids to improve shale stability: A review
May 2025
Wellbore instability is a critical challenge in drilling operations, especially in shale formations where interaction with water-based drilling fluids can result in significant operational risks and...
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Late Cretaceous marine incursion into central Africa
May 2025
The Late Cretaceous global transgression is one of the best documented episodes of continental submergence events. The extent of transgression of the Neotethys Ocean into the African continent is generally...
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Geological parameters and gas mixture composition on enhanced coalbed methane recovery: A THM modeling approach
May 2025
The utilization of coalbed methane (CBM) cannot only alleviate the energy crisis, but also reduce greenhouse gas emissions. Gas injection is an effective method to enhance CBM recovery. Compared to...
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Optimization of plunger lift working systems using reinforcement learning for coupled wellbore/reservoir
May 2025
In the mid-to-late stages of gas reservoir development, liquid loading in gas wells becomes a common challenge. Plunger lift, as an intermittent production technique, is widely used for deliquification...
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Shale weak cementation model and elastic modulus prediction based on nanoindentation experiment
May 2025
The successful development of shale oil and gas reservoirs is the biggest technological revolution in the oil and gas industry. Its key technologies are horizontal well drilling and fracturing, which...
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Effects of organic-inorganic transformation and interaction on the occurrence of nanopores within the organic-rich shale during thermal maturation: Insights from the hydrous pyrolysis experiments in a closed system
May 2025
The organic-inorganic transformation and interaction act as the critical role in the occurrence of nanopores within the organic-rich shales during thermal maturation. Hydrous pyrolysis experiments were...
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DLVO-based estimates of critical water saturation of shale: A case study of the lower Silurian Longmaxi shale in Sichuan Basin
May 2025
Shale gas is an important unconventional resource, and shale reservoirs typically contain both water and gas fluids. Water can occupy the shale gas storage space, reduce the flow capacity of shale gas,...
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Accurate reconstruction method of virtual shot records in passive source time-lapse monitoring based on SBA network
Available online 31 May 2025
Passive source imaging can reconstruct body wave reflections similar to those of active sources through seismic interferometry (SI). It has become a low-cost, environmentally friendly alternative to...
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The analysis of drill string dynamics for extra-deep wells based on successive over-relaxation node iteration method
Available online 30 May 2025
The complex vibration directly affects the dynamic safety of drill string in ultra-deep wells and extra-deep wells. It is important to understand the dynamic characteristics of drill string to ensure...
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Direct inversion of 3D seismic reservoir parameters based on dual learning networks
Available online 30 May 2025
Tight sandstone has become an important area in gas exploration. In this study, we propose a 3D seismic reservoir parameter inversion method for tight gas-bearing sandstone reservoirs using dual neural...
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Thin layer identification using a theoretical X-ray logging while drilling (LWD) density imaging tool
Available online 28 May 2025
With the increasing demand for oil exploration and subsurface resource development, density imaging plays an increasingly important role in identifying thin layers. However, conventional density imaging...
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Chemometric differentiation of oil families in the Mahu sag, Junggar Basin, NW China
Available online 28 May 2025
Most oil reservoirs that were found in the Junggar Basin are located in the Mahu sag and neighboring areas. Oil sources and classifications remain unresolved in this region. Oil source assessment can...
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