Development geology of unconventional natural gas: Enrichment mechanisms, sweet spot evaluation, and development response
Available online 14 August 2026
Unconventional natural gas has become an important contributor to the growth of global natural gas reserves and production expansion. However, pronounced heterogeneity among different reservoir types...
Integrated bio-stimulation framework for microbially enhanced coalbed methane recovery in dual-porosity reservoirs
Available online 14 August 2026
Predicting microbially enhanced coalbed methane (MECBM) extraction accurately presents a significant challenge, largely because current models fail to adequately integrate microbial kinetics with the...
Predicting total organic carbon in Wufeng–Longmaxi shales by coupling machine learning with multiple intelligent optimization algorithms: A case study from structurally complex Northern Guizhou
Available online 13 August 2026
Total organic carbon (TOC) plays a crucial role in unconventional oil and gas exploration. The traditional ΔlogR method faces limitations under complex geological conditions, while conventional machine-learning...
Research advances in nonlinear flow mechanisms and productivity prediction for horizontal wells in ultra-low-permeability gas reservoirs
Available online 13 August 2026
Natural gas plays a prominent role in China's transition toward a low-carbon energy system. Ultra-low-permeability gas reservoirs hold substantial natural gas reserves, but their efficient development...
Accurate quantification of multiple sulfur compounds in natural gas: Preparation and evaluation of a thioether-functionalized covalent organic framework-based gas chromatography capillary column
Available online 11 August 2026
Accurate quantification of sulfur compounds, such as hydrogen sulfide and mercaptans, is crucial for natural gas quality control and ensuring the safe supply of energy sources, given their high reactivity...
Recent advances in multi-physics coupled simulation of matrix acidizing and acid fracturing: New insights from CT-based digital rock physics
Available online 8 August 2026
Matrix acidizing and acid fracturing are crucial technologies for enhancing production in carbonate reservoirs. However, accurately predicting acidizing performance remains challenging due to strong...
Optimization of acid fracturing process in naturally fractured tight sandstone reservoirs
Available online 20 July 2026
Naturally fractured tight sandstone reservoirs in the Keshen Gas Field of the Tarim Basin are featured by low porosity and low permeability. Widespread calcite filling within natural fractures limits...
Digital twin-driven nonplanar fracture reconstruction and evaluation in tight reservoirs
June 2026
In tight oil reservoir development, hydraulic fracture morphology critically controls post-fracturing flow behavior. However, conventional microseismic monitoring remains limited in real-time characterization...
Effect of increased propensity for non-aqueous carbon dioxide formation on wormholing in carbonate acidizing: An acid flooding study
June 2026
Acid–rock reactions in carbonate reservoirs generate CO2, whose phase behavior significantly influences wormhole propagation and, consequently, matrix acidizing efficiency. In this study, backpressure-controlled...
Thermo-hydro-mechanical coupled simulation of fracture propagation under cyclic loading in hot dry rock
June 2026
Cyclic-loading hydraulic fracturing generates alternating stresses and complex fracture networks in hot dry rock (HDR), but the predictive accuracy of existing models is limited by insufficient consideration...
Influence of CO2 or flue gas (СО2+N2) injection on the change in gas permeability of a subpermafrost hydrate-saturated reservoir: Results of experimental modeling
June 2026
Large volumes of natural gas stored in hydrate form within marine and subpermafrost environments represent a significant resource for potential extraction and use. Various methods for developing hydrate...
Machine learning identification of diagenetic facies in tight sandstones based on sandbody classification: The Fourth Member of the Triassic Xujiahe Formation, Jianyang area, Sichuan Basin
June 2026
Within tight sandstones, diagenetic features exhibit strong heterogeneity and intra-subfacies similarities, meaning that different rock units often share comparable mineral compositions and pore structures....
Diagenetic differences controlled by sediment composition and their implications for reservoir quality in the deep-buried Permian Urho Formation, Fukang Sag, Junggar basin
June 2026
Deeply buried coarse clastic reservoirs of the Permian Upper Urho Formation in the Fukang Sag, Junggar Basin, exhibit pronounced reservoir-quality heterogeneity in pore systems and lithofacies architecture....
Review of the analysis and methods of natural gas pipeline network operation optimization
June 2026
The expansion of natural gas consumption and pipeline construction makes integrating artificial intelligence into pipeline network operations increasingly essential. This review summarizes progress...
Simultaneous pre-stack prediction of lithology, geofluids, and physical properties in deep tight sandstone reservoirs based on recharacterization of reflection coefficient approximation equation and Bayesian inversion strategy
June 2026
Pre-stack seismic inversion is an important tool for the quantitative interpretation of complex reservoirs. However, the increasing demands of deep tight sandstone exploration require a more integrated...
A two-layer model–based coupled simulation study of multi-cluster hydraulic fracture propagation and proppant transport in shale
June 2026
Effective proppant placement in multi-cluster hydraulic fractures is crucial for shale gas fracturing; however, existing numerical methods face challenges in accurately coupling dynamic fracture propagation...
Spatiotemporal evolution of lower-middle Triassic strata, Sichuan Basin, Southwestern China: Insights into the deformation mechanism of the Luzhou paleo-uplift and gas exploration
Available online 13 June 2026
The Sichuan Basin experienced profound structural changes during the Triassic, generating debate regarding the deformation mechanism of the Luzhou paleo-uplift and complicating future gas exploration...
Numerical analysis of hydraulic fracture initiation and propagation in elastoplastic hydrate-bearing sediments
Available online 11 June 2026
Hydrate-bearing sediments (HBS) exhibit pronounced plastic deformation, complicating both hydraulic fracture initiation and propagation. Conventional models typically assume purely elastic behavior...
Modeling overpressure vertical transfer via faults in clastic sequences at the basin scale: Implications for overpressure generation and fluid flow
April 2026
The vertical transfer of overpressure significantly influences the subsurface fluid dynamics, fault zone stability, and geomechanical drilling safety. However, the mechanisms governing vertical overpressure...
Inhibition performance and mechanisms of methane hydrate inhibitors in oil and gas pipelines
April 2026
During winter natural gas transportation, hydrate formation under low-temperature and high-pressure conditions frequently results in pipeline blockage and severe low assurance challenges. Although conventional...
The synthesis and evaluation of two new gas hydrate kinetic inhibitors
April 2026
Gas hydrate plugging is a common yet hazardous problem during oil and gas reservoir exploitation, compelling the petroleum industry to invest substantial resources annually in mitigation strategies....
Sand-carrying thresholds of viscous slickwater: Weissenberg number–based prediction and field application
April 2026
The complex viscoelastic and shear-thinning behavior of slickwater fracturing fluids imposes competing effects on proppant transport, complicating the prediction of sand-carrying capacity and increasing...
Machine-learning models for classification of mudcake thickness in oil-based drilling fluids
April 2026
The performance of oil-based drilling fluids (OBDFs) is critical for maintaining drilling efficiency under conditions in which water-based fluids fail to perform effectively. Mudcake or filtercake thickness...
CO2 solubility and mineral trapping behavior in high-salinity reservoirs
April 2026
CO2 solubility and mineral trapping behavior are critical to the stability and effectiveness of integrating CO2 geological storage synergistically with gas field produced water (GPW) reinjection, a...
Experimental and numerical simulation of gas injection for enhanced oil recovery in naturally fractured condensate gas reservoirs
April 2026
Gas condensate reservoirs constitute important natural gas resources; however, their development is frequently hindered by condensate banking and complex multiphase flow behavior. Naturally fractured...
