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...
Accurate reconstruction method of virtual shot records in passive source time-lapse monitoring based on SBA network
September 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...
OFC
September 2025
High-pressure driven lubricant infiltrated porous diamond for the preparation of self-lubricating diamond tools
September 2025
With the global oil and gas industry increasingly targeting ultra-deep well development, the demand for wear resistance in polycrystalline diamond compact (PDC) bits is increasing. However, further...
Multi-attribute risk assessment on helium investment environment in host countries
September 2025
Helium is a critical raw material, but its distribution is extremely uneven. To better mitigate trade risks and get a steady and safe supply of helium, it is of the upmost importance to assess the risk...
Experimental study of a circulation agent dynamic plugging for multi-scale natural fractures
September 2025
Lost circulation critically jeopardizes drilling safety and efficiency, and remains an unresolved challenge in oil and gas engineering. In this paper, by utilizing the self-developed dynamic plugging...
Deep feature learning for anomaly detection in gas well deliquification using plunger lift: A novel CNN-based approach
September 2025
Timely anomaly detection is critical for optimizing gas production in plunger lift systems, where equipment failures and operational issues can cause significant disruptions. This paper introduces a...
Method for determining the installation interval of vortexing cuttings removal tool and its mechanism
September 2025
Recent advancements in drilling technology have driven substantial progress in cuttings removal tool development, particularly for addressing borehole cleaning challenges in highly deviated directional...
Seismic pore-type characterization in tight carbonate reservoirs: A case study of the fourth member of Ordovician Majiagou Formation in Ordos Basin, China
September 2025
Carbonate reservoirs are known for their complex pore structures, which lead to variable elastic behaviors and seismic responses. These variations pose significant challenges for seismic interpretation...
Coaly source rock evaluation using well logs: The Jurassic Kezilenuer Formation in Kuqa Depression, Tarim Basin, China
September 2025
Coaly source rocks have attracted considerable attention for their significant hydrocarbon generation potential in recent years. However, limited study is performed on utilizing geochemical data and...
Lacustrine organic carbon sequestration driven by volcanism: A case study of the third submember of the Chang 7 Member of the Yanchang Formation in the Ordos Basin
September 2025
The Ordos Basin was recognized as the earliest terrestrial aquatic ecosystem to recover following Permian–Triassic mass extinction, significantly contributing to organic carbon sequestration during...