A5037369622- Geophysical Methods and Applications
- Geophysical and Geoelectrical Methods
- Methane Hydrates and Related Phenomena
- Geoscience and Mining Technology
- Seismic Imaging and Inversion Techniques
- Coal Properties and Utilization
- Advanced Algorithms and Applications
- Hydraulic Fracturing and Reservoir Analysis
- Seismic Waves and Analysis
- Hydrocarbon exploration and reservoir analysis
- Geomechanics and Mining Engineering
- Geological Studies and Exploration
- Arctic and Antarctic ice dynamics
- Underwater Acoustics Research
- NMR spectroscopy and applications
- Drilling and Well Engineering
- Rock Mechanics and Modeling
Central South University
2016-2019
Semi-airborne transient electromagnetics (SATEM) is a geophysical survey tool known for its ability to perform three-dimensional (3D) observations and collect high-density data in large volumes. However, SATEM processing presently restricted 3D model-driven inversion, which not conducive detailed surveys. This paper presents new model- data-driven inversion algorithm using the particle swarm optimization (PSO) gradient descent (GD) algorithms. PSO used suppress multiplicity of solutions...
Since goaf water can cause inrush, collapse or other severe geological hazards in coal mining, its detection has become a significant issue. As the grounded electrical source airborne transient electromagnetic (GREATEM) system provide considerable prospecting depth, lateral resolution, and high efficiency, method may be suitable for detection. To verify feasibility, field survey over Qinshui mine (Shanxi province, China) was conducted, used to detect geoelectric characteristics of water....
After a coal mine is abandoned, large amount of coalbed methane (CBM) resources still accumulated in the overlying and underlying strata. The structure coal/rock pore fracture, which key element for development CBM resources, changes significantly due to influence mining. In this study, volume size distribution (PSD) six coals (three parallel bedding three vertical coals), mudstones, sandstones before after fracture are compared from perspective macro micro using triaxial compression...
The water-rich zones in the coal fields of Northern China have seriously threatened safe production mines. It is necessary to accurately locate deep seated and complex water bodies which are usually located Ordovician limestone. Due relatively high cost seismic exploration, development effective electromagnetic detection methods corresponding data processing techniques for these areas becomes a topic EM geophysicist. In this study, method rapidly estimating burial depth undulating morphology...
At present, attenuation characteristics of hydrate applicable to the seismic frequency band are still controversial. In this study, dispersion and in different occurrence modes were defined from mesoscale perspective, saturation study area is estimated. Based on effective medium theory cementation theory, skeleton elastic modulus sedimentary layer was obtained present study. The variation P-wave with by patchy-saturation theory. increased when occurred suspension mode. decreased...
Following the advancement of machine learning-based seismic feature classification techniques for complex reservoirs, acquisition and analysis reliable samples involved in facies network-based inversion have emerged as a current research hotspot field intelligent processing. Many investigations focus on improvement model algorithms neural networks. However, creating collecting labels massive data are highly time-consuming laborious, suffer from sample unreliability category imbalance case...
Conventional post-stack seismic inversion can identify coal seam, but it cannot predict the gas bearing property of seam. Pre-stack data contain abundant fluid information underground, and from pre-stack we get volume that reflects characteristics. Many scholars have made different simplifications for Zoeppritz equation, accuracy has decreased. Charles P. Ursenbach (2002) linearized obtained pseudo-linear equation. The equation is simple higher than other approximate equations. In this...
The middle-east region of Qinshui coalfield locates in the eastern block depression, which terrain ups and downs surface lithology is changeful.How to choice excitation receiving parameters becomes main difficulty.In this paper, methods micro logging refraction encounter were used investigate structures shallow refined.According well data, determined reasonable horizon order assure exploration-grains explode bedrock or dense clay layer; depth, charge mass combination for different are...
Summary Seismic attributes technology is now widely used in seismic prospecting engineering. In this paper, we will use to predict the coal seam thickness ShanXi province. We have got field data area and extracted a variety of from reflected wave. After correlation analysis on known find has good linear with spectral attribute. take advantage center frequency amplitude attribute whole which agrees drill hole indicates that tuning function it feasible