25 Result(s)
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Article
Cracking Patterns and Damage Evolution Characteristics of Coal with Bedding Structures Under Liquid Nitrogen Cooling
Liquid nitrogen (LN2) fracturing has various advantages, such as low reservoir damage, minimal environmental impact, and excellent permeability. In this study, the cracking pattern and damage evolution characteri...
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Article
Silicified Microorganisms and Microorganism-Like Particles in the Groundwater of an Abandoned Coal Mine
Relatively little research has been conducted on the preservation of microorganisms and microbial particles in the groundwater of abandoned mines (GAM). In this study, silicified microorganism-like particles, ...
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Article
Pyrite trace element and S-Pb isotopic evidence for contrasting sources of metals and ligands during superimposed hydrothermal events in the Dong** gold deposit, North China
The Dong** gold deposit, located near the northern margin of the North China Craton, contains ore bodies spatially associated with the Devonian Shuiquangou syenite, Cretaceous Shangshuiquan granite, and Arch...
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Article
Water-in-zircon: a discriminant between S- and I-type granitoid
Granitic rocks are crucial in revealing continental crust formation and evolution. The classic S- and I-type granitoid classification (based upon metasedimentary vs. metaigneous protolith) is widely adopted, b...
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Article
Water Inrush Detection in Limestone Pit Rock Walls Using Borehole-to-Surface ERT
Large volumes of water originating from limestone pit rock walls can cause construction hazards. To ensure safe construction and avoid inaccurate grouting, localized detection work is necessary. Borehole-to-su...
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Article
Experimental Study on the Response Characteristics of the Apparent Resistivity of Rock True Triaxial Hydraulic Fracturing
To truly reflect changes in apparent resistivity before and after hydraulic fracturing (HF) of coal and rock masses in underground spaces, the fracturing effect should be investigated and evaluated. In this pa...
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Article
The prograde-to-retrograde evolution of the Huangsha** skarn deposit (Nanling Range, South China)
Huangsha** is a world-class skarn deposit hosting abundant W–Sn polymetallic mineralization in the Nanling Range, South China. Although the geochemistry of skarn-hosted mineral deposits has been extensively ...
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Article
Open AccessBed type and flow mechanism of deep water sub-lacustrine fan fringe facies: an example from the Middle Permian Lucaogou Formation in Southern Junggar Basin of NW China
Submarine or sub-lacustrine lobe deposits are important reservoirs, but the fan fringe deposits form heterogeneities within deep water fan deposits. Fan fringe facies records the complex sediment gravity flow ...
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Article
Open AccessProbing surface interactions of underwater oleophobic polyelectrolyte multilayers
In the present work, the interaction mechanism of specific polyelectrolyte multilayers (PEMs), fabricated by layer-by-layer deposition of polydiallyldimethylammonium chloride (PDDA) and poly(sodium 4-styrenesu...
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Article
Random-Drop Data Augmentation of Deep Convolutional Neural Network for Mineral Prospectivity Map**
Convolutional neural network (CNN) has demonstrated promising performance in classification and prediction in various fields. In this study, a CNN is used for mineral prospectivity map** (MPM) in the southwe...
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Article
Open AccessPhase behavior of heavy oil–solvent mixture systems under reservoir conditions
A novel experimental procedure was proposed to investigate the phase behavior of a solvent mixture (SM) (64 mol% CH4, 8 mol% CO2, and 28 mol% C3H8) with heavy oil. Then, a theoretical methodology was employed to ...
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Article
Numerical Analysis of No-Darcy Seepage of High-Pressure Gas Produced by Explosion in Deep Closed Geologic Body
Based on the analysis of the effect of underground closed explosion on geological bodies, a physical model of underground seepage of closed gas explosion is obtained. The model considers the changes of porosit...
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Article
Thermal stability and compressibility of bastnaesite
Bastnaesite (Ce0.50La0.25Nd0.20Pr0.05)CO3F is an interesting pattern family of (CO3)2− and F− co-existing phases, which is a meaningful sample to study the influence of multiple volatiles on minerals. Thermal sta...
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Article
Relative roles of formation and preservation on gold endowment along the Sanshandao gold belt in the Jiaodong gold province, China: importance for province- to district-scale gold exploration
The 13-km-long Sanshandao gold belt along the NNE-trending Sanshandao Fault has highly variable orogenic gold endowment along-strike. New thermochronological data from the small Cangshang gold deposit demonstr...
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Article
Multi-scale Numerical Simulation and 3D Modeling for Deep Mineral Exploration in the Jiaojia Gold District, China
In this study, deposit- and district-scale three-dimensional (3D) fault-and-intrusion structure models were constructed, based on which a numerical simulation was implemented in the Jiaojia gold district, Chin...
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Article
Open AccessAzimuthal elastic impedance-based Fourier coefficient variation with angle inversion for fracture weakness
Quantitative inversion of fracture weakness plays an important role in fracture prediction. Considering reservoirs with a set of vertical fractures as horizontal transversely isotropic media, the logarithmic n...
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Article
Open Access3D numerical simulation of heterogeneous in situ stress field in low-permeability reservoirs
Analysis of the in situ stress orientation and magnitude in the No. 4 Structure of Nanpu Sag was performed on the basis of data obtained from borehole breakout and acoustic emission measurements. On the basis ...
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Article
Open AccessGeochemical characteristics of the Permian marine mudstone and constraints on its provenance and paleoenvironment in the Fenghai area, Fujian Province, southeastern China
Permian marine strata have gradually become a research focus in the world. The marine strata of the Late Permian Dalong Formation (P3d) in the Fenghai area, Fujian Province, have become more and more important as...
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Article
Open AccessReconstruction of meandering paleo-channels using dense well data, Daqing Oil Field, Songliao Basin, China
Reconstructing meandering paleo-channels is attracting global research attention. We implemented a novel method by comprehensively integrating migration models and sedimentary structures. Firstly, the migratio...
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Article
Open AccessHierarchy and subsurface correlation of muddy baffles in lacustrine delta fronts: a case study in the X Oilfield, Subei Basin, China
Muddy baffles are one of the major geological factors controlling the underground fluid flow as well as the remaining oil distribution. This study used detailed drilling data from the E1f1 reservoir in the X Oilf...
