Lei Han

Enhanced Inversion for Distributed Acoustic Sensing: A Robust Approach with HOLp–OGS Regularization

Wenhua Xu, Jingye Li, Yaning Wu, Weiheng Geng et autres

Conversion from distributed acoustic sensing (DAS) measurements to geophone-equivalent data is important for integrating DAS into conventional seismic workflows. This is because most established seismic-processing algorithms are designed for particle-velocity or acceleration data, whereas DAS measures strain or strain rate. Recovering geophone-equivalent …

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An anisotropic brittleness index characterization method based on exact reflection coefficient equation

Qiyu Yang, Jingye Li, Yongping Wang, Lei Han et autres

ABSTRACT Shale reservoirs often exhibit low porosity and low permeability. Accurate characterization of brittleness, particularly the anisotropic brittleness index, is essential for effective hydraulic fracturing. However, it is difficult to obtain the stiffness coefficient c12 from seismic data in transversely isotropic (VTI) …

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First‐Principles Study on Hydrogen Damage of Stainless Steel Passivation Film under Strain and Hydrogen Enrichment

Yuanshuang Liu, Dingrong Qu, Lei Han

As the first barrier of 316L stainless steel under hydrogen working conditions, the passivation film (Fe 2 O 3 /Cr 2 O 3 ) plays a crucial role in preventing hydrogen embrittlement of the stainless steel substrate. This study investigates hydrogen damage …

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Solution-processable ionic covalent organic framework nanosheets for robust mixed matrix membranes with enhanced proton conductivity

Hao Li, Chunyang Fan, Lei Han, Haipeng Li et autres

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Engineering Solute–Solvent Interactions for the Synthesis of Covalent Organic Polymer Nanosheets

Lei Han, Chunyang Fan, Yawei Liu, Yuhan Yang et autres

Abstract Covalent organic polymer (COP) nanosheets hold great potential for widespread applicability, but their fabrication remains challenging. Here, a dipole‐moment‐mediation strategy is reported to manipulate solute–solvent interactions, enabling the facile synthesis of COP nanosheets under ambient conditions. Three COPs with different morphologies …

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Anisotropic Brittleness Characterization and Analysis of VTI Media

Qiyu Yang, Jingye Li, Yongping Wang, Lei Han et autres

ABSTRACT The brittleness index is a crucial parameter for evaluating the brittleness of subsurface reservoirs. Accurate brittleness determination optimizes fracture design and guides oil and gas extraction, especially in shale formations. Traditionally, the brittleness index assumes isotropy, which fails to capture the …

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Accelerated discovery of stable, extra-large-pore nano zeolites with micro-electron diffraction

Chao Ma, Zhenghan Zhang, Cong Lin, Lei Han et autres

Stable zeolites with extra-large pores and nano dimensions that are capable of processing large molecules are in high demand but have been difficult to produce. Their complex structures and nanoscale crystal sizes present challenges for analysis using conventional x-ray diffraction techniques, leading …

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Depth-domain time-lapse seismic simultaneous inversion based on an accurate Zoeppritz equation

Wenjin Li, Jingye Li, Xin Bo, Lei Han et autres

Abstract Time-lapse (TL) seismic technology has been widely adopted across various geophysical domains by quantifying reservoir dynamics through the analysis of discrepancies in time-lapse seismic data. Currently, established TL seismic inversion methods are predominantly in the time domain. However, owing to advancements …

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Prestack joint inversion based on multi-components seismic data using analytical solution of 1D elastic wave equation

Weiheng Geng, Wenkai Lu, Jingye Li, Xiaohong Chen et autres

We have introduced a new PP and PS joint inversion method based on the analytical solution of the 1D elastic wave equation (ASEW). The ASEW can simulate the phase changes of PP and PS waves, so it has the ability to simplify …

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Time-lapse seismic joint inversion based on Zoeppritz equation in depth domain

Wenjin Li, Jingye Li, Lei Han, Zhen Liao

The depth migration results have been confirmed to have higher vertical resolution and horizontal continuity then migration in the time-domain. Time-lapse seismic technology has been widely used in many geophysical fields to monitor the change in reservoir between two period. Here, we …

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Polyelectrolyte-assisted fabrication of large-area 2D polymer nanosheet membranes with ultrafast proton conduction

Haipeng Li, Chunyang Fan, Lei Han, Hao Li et autres

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Electronic Properties of Janus TMD WSSe/WX2 (X = S, Se) Heterostructure by External Strain: A Hybrid Functional Study

Yuanshuang Liu, Zhe Yang, Zhuo Jiang, Qingkai Qian et autres

Harvesting solar energy for artificial photosynthesis is an emerging field in alternative energy research. In this work, the structural, electronic, and optical properties of WX 2 (X = S, Se)/WSSe heterostructures were systematically studied. Based on the computation results, these heterostructures outperform …

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