Gas Technology Institute

A Compositional and Genetic Framework for Shale Lithofacies Classification and Reservoir Quality Prediction: Insights From the Wufeng‐Longmaxi Formation, South Sichuan

ABSTRACT Although shales are of fundamental importance in geological research and energy exploration, no consensus has been reached on a unified classification and nomenclature that adequately reflect their multiscale heterogeneity and genetic origins. To address this gap, we pro...

Numerical Simulation on Descaling Performance of Ultrasonic-Assisted Water Jet Under High Confining Pressure

Severe scale buildup threatens the safe operation of downhole tubing and subsea pipelines under high confining pressure. Conventional descaling methods are less effective in enclosed high-pressure environments, where elevated ambient pressure suppresses ultrasonic cavitation and...

Novel Technique to Enhance Hydraulic Fracture Permeability by Controllable Biomimetic Mineralization: Transitioning from Liquid Injection to Solid Propping

Abstract Unconventional oil and gas have been playing an increasingly important role in the global energy market. The primary development technique for shale and tight reservoirs is hydraulic fracturing, which aims to create high-permeability channels propped by quartz sand or ce...

Numerical Investigation of LPG Leakage Dispersion and Explosion Consequences in a Spherical Tank with Safety Walls

Abstract Liquefied petroleum gas (LPG) leakage from spherical tanks can generate near-ground flammable vapor clouds and subsequent fire and explosion hazards. A three-dimensional FLACS model of a 1000 m3 LPG spherical tank was established to investigate the effects of safety-wall...

A cluster-randomized controlled trial of a family-based psychosocial intervention to prevent childhood obesity from preschool ages: the PRESAFALIN study protocol

Abstract Background: Childhood obesity is a major global concern, and Spain's high obesity rates highlight the urgent need for effective and innovative interventions in early age. The PRESAFALIN study aims to promote parental competence, self-efficacy, and resilience to improve c...

Host-ControlledStepwise CO2 Growth onMaleic Anhydride Revealed by Rotational Spectroscopy

Abstract Gas-phase aggregation of CO2 with organic compounds provides molecular-level benchmarks for understanding how weak interactions guide early cluster growth─a process relevant to CO2 recognition, uptake, and organization in chemically diverse environments. Here, clusters o...

OVT-Domain Azimuthal Traveltime-Constrained AVO Inversion Method

Azimuthal traveltime analysis provides comparatively stable fracture-orientation estimates but limited information on fracture-related elastic changes, whereas amplitude variation with offset (AVO) inversion is sensitive to residual azimuthal moveout. We propose a sequential offs...

Preparation andEvaluation of Biopolysaccharide-BasedTemperature-Resistant Drilling Fluid Additives

Abstract Xanthan gum (XG), valued for its environmental friendliness and multifunctionality, has been extensively utilized in drilling fluids. However, its inadequate thermal stability at elevated bottomhole temperatures encountered in deep drilling operations has constrained its...