A5100388043- Seismic Imaging and Inversion Techniques
- Rock Mechanics and Modeling
- Seismic Waves and Analysis
- Geoscience and Mining Technology
- Geophysical Methods and Applications
- Hydraulic Fracturing and Reservoir Analysis
- earthquake and tectonic studies
- Image and Signal Denoising Methods
- Radioactive element chemistry and processing
- Geological and Geochemical Analysis
- Seismic Performance and Analysis
- Enzyme Catalysis and Immobilization
- Drilling and Well Engineering
- Enzyme Structure and Function
- Concrete and Cement Materials Research
- Geochemistry and Elemental Analysis
- Microbial Metabolic Engineering and Bioproduction
- Ultrasonics and Acoustic Wave Propagation
- Concrete Corrosion and Durability
- Extraction and Separation Processes
- Magnesium Oxide Properties and Applications
- Seismology and Earthquake Studies
- Blind Source Separation Techniques
- High-pressure geophysics and materials
Jilin University
2023
Shaanxi Research Design Institute of Petroleum and Chemical Industry
2023
Shandong University
2017-2022
Shandong Transportation Research Institute
2020-2022
Research Institute of Innovative Technology for the Earth
2016-2017
Marine Biology Institute of Shandong Province
2017
Chengdu University of Technology
2011
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
2011
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ABSTRACT Microbial esterases play important roles in deep-sea organic carbon degradation and cycling. Although they have similar catalytic triads oxyanion holes, are hydrolases homoserine transacetylases (HTAs) transferases. Because two HTA homologs were identified as acetyl esterases, the family was recently divided into bona fide acetyltransferase subfamily esterase subfamily. Here, we characterized a novel HTA-like esterase, Est22, from sedimentary metagenomic library. Est22 could...
During the hydraulic fracturing procedure in shale-gas exploitation, poroelastic properties of shale formation can be altered significantly. However, it is difficult to evaluate these variations using microseismic field data. In this study, we conduct a hydro-fracturing experiment Longmaxi shale, which major for production China, simulate water injection and rock procedure. The variation velocity attenuation primary/secondary (P/S) ultrasonic waves was investigated throughout entire...
As the second most significant metal following steel, aluminum plays a vital role in advancement of both strategic emerging industries and national economic development. The existing oil gas drilling data indicate that deep bauxite deposits is abundant around Ordos Basin China, at depths ranging from several hundred meters to kilometers. Based on geological hydrogeological characteristics analysis, it found basin have distinct electrical characteristics, characterized by four highs two lows....
In view of the key problem that a large amount noise in seismic data can easily induce false anomalies and interpretation errors exploration, time‐frequency spectrum subtraction (TF‐SS) method is adopted into processing to reduce random data. On this basis, main frequency information calculated used optimize filtering coefficients. According characteristics effective signal duration between voice data, selection coefficient are modified. addition, simulation tests were conducted by using...
解説 (I) では二酸化炭素 (CO2) 地中貯留に最適とされる,多孔質砂岩でのCO2貯留メカニズムを述べた。ポイントは,貯留層でのCO2の移動とトラップがキャピラリー圧と不均質に支配されることである。不均質のスケールは,孔隙から地層の堆積構造までのミクロからマクロにわたる。本解説では,前解説で述べた論点を引き継ぎ,医療用X線CTによるCO2飽和度と弾性波速度の同時計測実験の結果を議論する。実験で得られたCO2飽和度とP波速度との関係は非一意的で,結果は連続ランダムパッチモデル (continuous random patchy saturation model) で解釈される。モデルを理解するため,最初に流体を含む多孔質岩石の弾性的性質を記述する基本式と,ランダム不均質からの散乱による弾性波速度変化の基本式を扱う。次に我々の実験結果をこのモデルで解釈した例を紹介し,最後に実験とモデルによる解析で得られた結果を貯留層のモニタリングに適用する手法を議論する。以下が本解説のポイントである。1. 塩水を含む多孔質岩石の孔隙を占有するCO2クラスターが速度不均質を作る。2....
The seismic ahead-prospecting method is useful to detect anomalous zones in front of the tunnel face. However, most existing detection designed for drilling and blasting tunnel. should be improved satisfy rapid tunneling Tunnel Boring Machines (TBMs). This study focuses on reducing time spent data processing result analysis. Therefore, reduce time, an automatic initial model establishment based surrounding rock grade proposed. To analysis avoid subjective judgment, a modified k-means++...
The M s 8.0 Wenchuan Earthquake of May 12, 2008 resulted in oblique dextral-thrust motion the Longmen Shan tectonic belt resulted. During this earthquake event, 133 sets three-component acceleration records were collected by digital network Sichuan Province. By using these and some strong from networks Shanxi Gansu provinces, contours peak ground determined. These are elliptically shaped with major axis oriented a northeast direction. decayed more gradually toward northeast, parallel to...