Formation and preservation processes of Ediacaran microbial dolomite pore system, evidence from the Qigebrak Formation, Tarim Basin, China
Available online 4 November 2025
Ancient microbial dolomite reservoirs exhibit distinct advantages in both their formation and preservation processes, making them significant hosts for hydrocarbon resources. However, the interaction...
Genesis of Late Carboniferous volcanic rocks in the Kebai Fault Zone, Western Junggar, Xinjiang: Constraints from zircon U-Pb age, whole rock geochemistry, and Sr-Nd-Pb isotopes
Available online 4 November 2025
The Late Paleozoic tectonic evolution of the Junggar Basin played a critical role in the formation of its oil and gas resources; however, as most of the basin is covered by desert, the evolutionary...
In-situ pressure-preserved coring for deep resources exploration: A novel pressure sealing subsystem and its service performance
Available online 4 November 2025
In-situ pressure coring technology is a responsible exploration technique for enhancing the efficiency and capacity of deep resources development. However, reliability issues in pressure sealing introduce...
Enhancing acrylamide-based polymer performance in high temperature drilling fluid: Role of isopentenol polyoxyethylene ether
Available online 1 November 2025
Acrylamide-based polymers have been widely applied in drilling fluids due to their excellent water solubility, structural tunability, and adaptability to various fluid systems. However, under high-temperature...
Numerical and physical simulations of acoustic imaging for adjacent well detection while drilling
Available online 1 November 2025
With increase in the number of operations involving relief wells, radial wells, U-shaped wells, and other complex well structures, challenges such as collision prevention, obstacle bypassing, and adjacent-well...
Insights into the evolution of pore structure and novel stress sensitivity determination of porosity-permeability in unconventional rocks
Available online 1 November 2025
The sensitivity of petrophysical parameters such as porosity and permeability to stress conditions is critical in unconventional reservoir management. Calculation of these dependencies on stress conditions...
Multifactor controls on imbibition oil recovery in shale: Insights from low-field nuclear magnetic resonance
Available online 1 November 2025
Shale is characterized by a complex mineral composition and a well-developed, multiscale pore network spanning from micropores to nanopores, which gives rise to a highly intricate microscopic imbibition...
Physics-informed graph neural network for predicting fluid flow in porous media
October 2025
With the rapid development of deep learning neural networks, new solutions have emerged for addressing fluid flow problems in porous media. Combining data-driven approaches with physical constraints...
Hydraulic fracturing induced casing deformation and fault activation: from single-well fracturing to well-factory fracturing
October 2025
Hydraulic fracturing-induced casing deformation and fault activation have greatly hindered the safe and efficient development of shale oil and gas resources. In this study, statistical analysis, physical...
Finite-difference simulation of elastic waves in fluid-solid coupled media with irregular interface
October 2025
The finite-difference method (FDM) is an essential tool in exploration geophysics, particularly for simulating wave propagation in fluid-solid coupled media. Despite its widespread use, FDM faces significant...
Development strategies of a gas condensate reservoir with a large gas cap, thin oil rim, strong bottom water, and natural barriers
October 2025
The development of gas condensate reservoirs with a large gas cap, thin oil rim, strong bottom water, and natural barriers faces numerous challenges, including reservoir heterogeneity, coning effects,...
Real-time NMR investigation of water infiltration mechanisms and pore structure evolution in fractured sandstone near-wellbore regions
October 2025
During the exploitation of sandstone gas reservoirs, natural fractures near the wellbore affect water infiltration and pore evolution; however, the impact mechanisms of these fractures remain unclear....
Surface erosion thickness and oxygen isotope of the Early Jurassic lake water in northern Sichuan Basin, evidence from clumped isotopes of shell limestones
October 2025
Oxygen isotope (δ18O) of paleolake water is a key indicator for reconstructing the formation temperature and diagenetic history of lacustrine carbonate minerals. In this study, we use clumped isotopes...
Structural determinants of asphaltenes behavior: Heteroatom-driven aggregation dynamics and viscosity enhancement in heavy oil systems
October 2025
Heavy oil, constituting a significant portion of global oil reserves, presents unique challenges in extraction and processing due to its high viscosity, largely influenced by asphaltenes and their heteroatom...
Synthesis kinetics of B-COPNA resin monitored by the transformation of functional groups using in-situ FTIR spectroscopy
October 2025
B-COPNA resin, synthesized from the light fraction of ethylene tar (ETLF), is a superior precursor of the carbon materials. An in-depth understanding of the COPNA resin preparation process and strict...
Experimental investigation of surfactants and their ethanol blends for CO2–oil miscibility enhancement in CO2-EOR
October 2025
As one promising CO2 capture, utilization and storage (CCUS) technology, miscible CO2-enhanced oil recovery (CO2-EOR) significantly outperforms immiscible flooding in enhancing oil production and storing...
A study on numerical simulation method of Cs2LiYCl6:Ce3+ detection response in neutron well logging
October 2025
Neutron well logging, using instruments equipped with neutron source and detectors (e.g., 3He-tubes, NaI, BGO), plays a key role in lithological differentiation, porosity determination, and fluid property...
Study on swelling and retention of liquid hydrocarbon compounds by type I kerogen
October 2025
In this paper, experiments were carried out to investigate the retention of liquid hydrocarbons in kerogen type I. The study focuses on the mudstone from the Lucaogou Formation in the Junggar Basin...
Study on the synergistic effects of dynamic impact damage and acid etching treatment on the mechanical properties and pore characteristics of shale
October 2025
The low porosity and low permeability of shale remain the primary challenges in shale gas exploitation. Traditional single permeability enhancement techniques have shown limited efficacy, failing to...
The genetic mechanism of salt minerals in Fengcheng Formation in Hashan area, northwestern margin of Junggar Basin
October 2025
The Fengcheng Formation in the Hashan area, located on the northwestern margin of the Junggar Basin, represents a saline-alkaline lake facies with fine-grained mixed sedimentation. This formation is...
Petroleum recovery from salt cavern through natural gas displacement: Insights from a gas–oil two-phase flow model with gas dissolution and exsolution
October 2025
The challenge of wide brine source and its additional problems come from the economy (energy consumption and other costs), security (re-dissolution of surrounding salt rocks), and environment (groundwater...
Can clay-rich reservoirs in predominantly-freshwater lacustrine shale systems serve as primary exploration targets in low-medium maturity? A case study of the Triassic Yanchang Formation of the Ordos Basin
October 2025
Whether clay-rich shale reservoirs with low-medium maturity can serve as primary exploration targets remains a focal point of debate in the academic community. Clarifying the exploration potential of...
Direct inversion of 3D seismic reservoir parameters based on dual learning networks
October 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...
Deformation and failure evolution mechanism of inherently anisotropic sedimentary rocks under true-triaxial stress
October 2025
Understanding the mechanical behavior and failure characteristics of anisotropic sedimentary rocks under true-triaxial in-situ stress conditions is critical in understanding and mitigating damaging...
Experimental investigation of particle settling characteristics in narrow fractures with rough walls
October 2025
Particle settling in narrow rough fractures is a common but poorly understood phenomenon during hydraulic fracturing. This study first constructs a large slot with two rough surfaces to simulate rock...