25 Result(s)
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Article
Inversion of array induction logs and its application
With the help of the modified geometrical factor theory, the Marquardt method was used to calculate the true electrical parameters of the formation from array induction logs. The inversion results derived from...
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Prediction of density and viscosity of ternary systems [C2q]Br+[C4q]Br+H2O, [C2q]Br+[C6q]Br +H2O, and [C4q]Br+[C6q]Br+H2O at different temperatures using their binary subsystems data
The simple equations for prediction of the density and viscosity of mixed electrolyte solutions were extended to the related properties of mixed ionic liquid solutions. The density and viscosity were measured ...
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Open AccessContribution of moderate overall coal-bearing basin uplift to tight sand gas accumulation: case study of the Xujiahe Formation in the Sichuan Basin and the Upper Paleozoic in the Ordos Basin, China
Tight sand gas is an important unconventional gas resource occurring widely in different petroleum basins. In coal-bearing formations of the Upper Triassic in the Sichuan Basin and the Carboniferous and Permia...
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Open AccessSeismic fluid identification using a nonlinear elastic impedance inversion method based on a fast Markov chain Monte Carlo method
Elastic impedance inversion with high efficiency and high stability has become one of the main directions of seismic pre-stack inversion. The nonlinear elastic impedance inversion method based on a fast Markov...
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Article
Numerical Simulation of Water Flow from the Coal Seam Floor in a Deep Longwall Mine in China
The study of groundwater flow from the coal seam floor is critical to safe mining operations in China. We developed a numerical simulation model to describe flood water pathways during mining, using the field ...
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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...
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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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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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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
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
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
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
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
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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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 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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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
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...
