Geochemical characteristics and sources of natural gas in the Upper Paleozoic limestone strata, Ordos Basin
Available online 17 October 2025
The discovery of high-yield industrial gas flows in the limestone layer of the Permian Taiyuan Formation in the Ordos Basin highlights promising prospects for natural gas exploration and has positioned...
Optimization and application of KCl polymer drilling fluid balancing wellbore stability and logging response accuracy
Available online 17 October 2025
In Dagang Oilfield in China, the utilization of the KCl polymer water-based drilling fluid (WBDF) in mid-deep exploration/appraisal wells presents a challenge in simultaneously optimizing resistivity...
Changes in the effective absolute permeability of hydrate-bearing sands during isotropic loading and unloading
Available online 16 October 2025
The effective stress of marine sediments frequently shifts owing to natural or anthropogenic factors, and a broad spectrum of processes fundamentally require accounting for sediment responses to such...
Biomimetic inspired superhydrophobic nanofluids: enhancing wellbore stability and reservoir protection in shale drilling
Available online 15 October 2025
Shale oil and gas, as typical unconventional resources, have gradually altered the global energy supply and demand landscape, attracting significant attention over recent decades. However, challenges...
Optimization of rate of penetration through improved bit durability and extended directional nozzle
Available online 15 October 2025
The enhanced drilling parameters and custom-designed polycrystalline diamond compact (PDC) bits have greatly improved both rate of penetration (ROP) and footage. Then how to further improve the bit’s...
Development and feasibility test of a fan-shaped hydrate simulator with a radius of 3 m
Available online 13 October 2025
Large-scale physical simulation is essential for advancing our understanding of natural gas hydrates exploitation mechanism. However, cylinder-shaped simulators often face challenges in balancing large...
Azimuthal amplitude inversion in stress-induced anisotropic media based on stress-dependence of microcrack compliance
Available online 13 October 2025
The elastic properties of subsurface rocks are almost always stress-dependent, which is usually attributed to stress-sensitive microcracks. Incorporating the effect of stress on microcrack compliance,...
Irregularly seismic data interpolation based on deep learning with integrated channel-spatial attention mechanism
Available online 11 October 2025
To address the challenges of irregular sampling and insufficient spatial sampling in field seismic data, this study proposed a deep learning-based interpolation method incorporating dual channel spatial...
The heat-fluid-solid coupling erosion mechanism for the optimal spray distance and jet angle in high-pressure water jets
Available online 10 October 2025
Focusing on the conversion of pressure energy and internal energy under viscous dissipation, a heat-fluid-solid coupling method is established to study the flow and stress fields of 100 MPa submerged...
Study of the effect of wax on carbon dioxide hydrate formation in oil–water mixture with high water content
Available online 10 October 2025
The impact of wax on the formation of hydrates has not yet been established due to the inherent complexity of oil–water mixtures. The O/W system has not been as extensively studied. In light of the...
Competition between viscous and capillary forces triggers diversity of fluid distribution and imbibition modes
Available online 6 October 2025
Spontaneous imbibition is the process in which the wetting phase displaces a non-wetting phase under the action of capillary forces. However, variations in interfacial properties, imbibition directions,...
Processing capacity allocation of multiple production system for gas field multi-stage development
Available online 4 October 2025
The multi-stage development strategy is often adopted in the gas field. However, when the productivity decline occurs, many large processing stations will be severely idle and underutilized, significantly...
Performance of steam injection process in layered heavy oil reservoirs: An experimental and numerical investigation
Available online 1 October 2025
Layered heavy oil reservoirs are widely distributed hydrocarbon resources and play a crucial role in fulfilling the global increasing demand for energy. Due to the existence of interlayer heterogeneity,...
Experimental study of the characteristics of reverse fault slip induced by hydraulic fracturing
September 2025
Hydraulic fracturing (HF) has achieved significant commercial success in unconventional oil and gas development. However, it has the potential to induce fault slip. This study investigates the physical...
Enhancing uniformity of multi-fracture propagation by temporary plugging and diversion fracturing in a horizontal well with multi-cluster perforations
September 2025
Multi-stage and multi-cluster fracturing (MMF) is a crucial technology in unconventional oil and gas development, aiming to enhance production by creating extensive fracture networks. However, achieving...
Gas generation from oil-prone mudstones in the Eocene Wenchang A Depression, Pearl River Mouth Basin
September 2025
Gas derived from the primary cracking of kerogen and the secondary cracking of oil has historically been the focus of petroleum geologists, given its importance as a gas source. The Wenchang A Depression...
Chemometric differentiation of oil families in the Mahu sag, Junggar Basin, NW China
September 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...
An unsupervised intelligent warning model for drilling kick risk based on multi-temporal feature coupling
September 2025
As oil and gas exploration continues to progress into deeper and unconventional reservoirs, the likelihood of kick risk increases, making kick warning a critical factor in ensuring drilling safety and...
Modification of the bubble drag force model and prediction of gas-liquid two-phase flow dynamics in blade-type multiphase pumps
September 2025
In multiphase pumps transporting gas-liquid two-phase flows, the high-speed rotation of the impeller induces complex deformations in bubble shapes within the flow domain, making the prediction of gas-liquid...
Hydrate formation and agglomeration in Pickering emulsions stabilized by hydrophilic and hydrophobic nano-CaCO3 particles
September 2025
The stability of oil-dominated emulsions, including oil-based drilling fluids and crude oils, is crucial for mitigating gas hydrate risks in the petroleum and natural gas industries. Nanoparticles can...
Investigation into the characteristics of magnesite tailings-catalyzed gasification of petroleum coke
September 2025
This study systematically investigated the catalytic gasification of two distinct petroleum coke (PC) using magnesium-based tailings (MT) as the catalyst. The research objectives focused on comparative...
Study of micromechanical characteristics and failure mechanism of conglomerate reservoirs
September 2025
Mahu Sag, located in Junggar Basin, China, is the largest conglomerate oil reservoir in the world (in this paper, conglomerate generally refers to rocks containing gravel, including pebbly sandstone,...
Temporary plugging agent transport behavior within visualized multi-fracture created during TPDF in a horizontal well: An experimental study
September 2025
Temporary plugging and diversion fracturing (TPDF) is widely used to promote the uniform and complex distribution of multi-clustered hydraulic fractures (HFs) in a horizontal well of the unconventional...
Preparation and performance of high temperature resistant and high strength self-healing lost circulation material in the drilling industry
September 2025
Lost circulation of drilling fluid is an international engineering problem during drilling. Aiming at the problems of the first-time lost circulation control success rate and poor adaptability of traditional...
The characteristics and controlling factors of high-quality reservoirs of ultra-deep tight sandstone: A case study of the Dabei Gas Field, Tarim Basin, China
September 2025
High-quality reservoirs with sufficient physical properties of ultra-deep tight gas reservoirs in the Lower Cretaceous Bashijiqike Formation exhibit significant relationship with gas production across...