A5047375204- Seismic Imaging and Inversion Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Seismic Waves and Analysis
- Drilling and Well Engineering
- Hydrocarbon exploration and reservoir analysis
- Image and Signal Denoising Methods
- Seismology and Earthquake Studies
- Pluripotent Stem Cells Research
- Time Series Analysis and Forecasting
- Advanced Computational Techniques and Applications
- NMR spectroscopy and applications
- Geoscience and Mining Technology
- CRISPR and Genetic Engineering
- Geophysical Methods and Applications
- Neuroscience and Neural Engineering
- Image Processing and 3D Reconstruction
- Geophysical and Geoelectrical Methods
- Underwater Acoustics Research
- Advanced Malware Detection Techniques
- Iterative Learning Control Systems
- Sparse and Compressive Sensing Techniques
- Calcium signaling and nucleotide metabolism
- Biometric Identification and Security
- Peroxisome Proliferator-Activated Receptors
- Circular RNAs in diseases
China University of Petroleum, Beijing
2015-2025
Foshan Maternity and Child Health Care Hospital
2022-2024
Shanghai University of Electric Power
2024
Tsinghua University
2019-2022
Southern Medical University
2022
Affiliated Hospital of North Sichuan Medical College
2020-2021
Institute of Zoology
2016
Chinese Academy of Sciences
2016
University of Chinese Academy of Sciences
2016
Sino-Danish Centre for Education and Research
2016
A critical event in the pathogenesis of kidney fibrosis is transition macrophages into myofibroblasts (MMT). Exosomes play an important role crosstalk among cells and development renal fibrosis. However, myofibroblast-derived exosomes process MMT progression remains unknown. Here, we examined fibrogenesis.
To overcome the weaknesses of conventional prestack amplitude variation with angle inversion based on various linear or quasi-linear approximations, we have conducted a nonlinear method using exact Zoeppritz matrix (EZAI). However, was highly and often unstable, if not properly treated. tackle these issues, used an iteratively regularizing Levenberg-Marquardt scheme (IRLM), which regularizes problem within algorithm that minimizes misfit between observed modeled data at same time by...
The classical pre-stack seismic inversion technique uses the Zoeppritz equation and its simplified versions to calculate PP PS reflection coefficients at different incidence angles, aiding in inverting subsurface velocity density parameters. Despite widespread application, amplitude variation with angle (AVA) based on has limitations regarding accuracy. AVA neglects transmission losses effects of multiple reflections during wave propagation, resulting reduced resolution. In contrast,...
In the Chaixi region of Qaidam Basin’s Qigequan tectonic zone, compact sandstones are characterized by their low porosity and permeability, featuring intricate pore-throat formations, varied lithologies, assorted clay minerals, pronounced unevenness among reservoirs. There’s a weak link between reservoir metrics logging reactions, making it challenging to assess these parameters. The microscopic pore structure can be illustrated through both nuclear magnetic resonance relaxation time...
The description of the "sweet spot" region is crucial for unconventional shale gas explo-ration and development, as it can clearly depict distribution high-quality reservoirs in target area. Due to strong anisotropic characteristics reservoir porosity rock physics, conventional seismic methods are difficult meet predic-tion reservoirs, including high TOC content, fracture brit-tleness index. Therefore, this article comprehensively utilizes inversion results brittle indicator factors, well...
A rock physics model is a very effective tool to describe the anisotropy and mechanical properties of from seismology perspective. Compared conventional reservoir, modelling shale reservoir requires us face two main challenges in modelling: existence organic matter strong anisotropy. We construct an anisotropic workflow for typical Southwest China, which treated separately other minerals by using combination self-consistent approximation differential medium method. The standard deviation...
Highlights•Tet3 rapidly and efficiently promotes the direct conversion of fibroblasts into neurons•Tet3-mediated demethylation leads to transcriptional changes activating neuronal genes•Tet3-induced neurons display maturing firing patterns form functional synapsesSummaryThe somatic cells by bypassing multipotent cell state may be a powerful approach for personalized medicine. In addition transcription factors multiple small molecules, we find that epigenetic modification also contributes...
Normal-moveout (NMO) correction is one of the most important routines in seismic processing. NMO usually implemented by a sample-by-sample procedure; unfortunately, such implementation not only decreases frequency content but also distorts amplitude waveforms resulting from well-known stretch. The degree stretch increases with increasing offset. To minimize severe associated far offset, we use dynamic time warping (DTW) algorithm to achieve an automatic matching nonstretch correction, which...
When seismic waves propagate through the earth, their high-frequency energy is absorbed by subsurface viscoelastic media. Seismic wavelet appears to be stretched out, as it dominated low-frequency components. In order enhance resolution, we propose here a compression method that utilizes scale characteristic in Fourier transform. The novelty of scheme frequency-dependent scaling extends amplitude spectrum both high- and axes simultaneously. This for first time make this proposal, instead...
Background: Long non-coding RNA bladder cancer associated transcript 1 (BLACAT1) is oncogenic in several types of cancers. However, little known concerning its expression and function prostate cancer. Methods: Paired samples were collected, the levels BLACAT1, miR-29a-3p disheveled segment polarity protein 3 (DVL3) examined by quantitative real-time polymerase chain reaction (qRT-PCR); BLACAT1 shRNAs transfected into PC-3 LNCaP cell lines, proliferative ability was detected counting kit-8...
Seismic wave attenuation and dispersion are largely related to the fluid content in reservoirs, which has been verified by rock physics models, numerical modeling some field case studies. The main mechanism of seismic is wave-induced flow due heterogeneity at different scales, including 'macroscopic', 'microscopic' 'mesoscopic'. Recently, studies on have focused mesoscopic rock. Previous shown that there many factors influencing attenuation, amongst all parameters, gas saturation a very...
PreviousNext No AccessSEG Technical Program Expanded Abstracts 2013Joint AVO Inversion of PP and PS waves using exact Zoeppritz equationAuthors: Lixia ZhiShuangquan ChenXiang-yang LiLixia ZhiState Key Laboratory Petroleum Resources Prospecting, China U PetroleumSearch for more papers by this author, Shuangquan ChenState Xiang-yang LiEdinburgh Anisotropy Project, British Geological SurveySearch authorhttps://doi.org/10.1190/segam2013-0352.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload...
For seismic data interpretation, horizon picking based on events in stacked or migrated sections is essential for obtaining information subsurface structures. This conventional work time-consuming via manual implementation. In this paper, we develop an automatic event tracking method of interpretation using the dynamic time warping (DTW) algorithm. The proposed consists two steps: calculating local shifts between adjacent traces through a pilot trace and then tracking. method, DTW algorithm...
Abstract The Upper Triassic Xujiahe Formation is a typical tight gas reservoir in which natural fractures determine the migration, accumulation and production capacity of gas. In this study, we focused on influences migration production. We clarified characteristics attributes (i.e. dips, apertures, filling degree cross-cutting relationships) based image logging interpretations core descriptions. Previous studies electron spin resonance, carbon oxygen isotopes, homogenization temperature...
Mesoscale fractures of length on the order centimeters to meters play a crucial role in fluid flow and hydrocarbon production fractured reservoirs, are great interest reservoir engineers. Therefore, we need find method for obtaining information mesoscale fractures. Most comes from seismic data, specifically through study fracture-induced azimuthal anisotropic attributes, such as velocity variation with azimuth (VVAZ), amplitude (AVAZ) Q (quality factor attenuation) (QVAZ). Using these...
Young’s modulus and Poisson’s ratio are important for reservoir characterization rock brittleness prediction in unconventional resource exploration development. Conventional methods can estimate by indirect calculations direct inversion using approximate expressions, which have cumulative errors limited accuracy of the estimated results, especially at large incident angles. In this study, we derived a new form Zoeppritz equation P-to-P wave reflection coefficient terms density modulus,...
Based on the data of cores, thin sections, well logs, and test experiments, characteristics main controlling factors lamellation fractures in continental shales third fourth members Paleogene Qianjiang Formation Depression, Jianghan Basin, are studied. Lamellation mainly develop along laminas shales. They have various morphological such as straightness, bending, discontinuity, bifurcation, pinching out, merging. with high density show poor horizontal continuity connectivity characteristics....
S-velocity and density are very important parameters in distinguishing lithology estimating other petrophysical properties. A reliable estimate of is difficult to obtain, even from long-offset gather data. Joint inversion PP PS data provides a promising strategy for stabilizing improving the results elastic density. For 2D or 3D inversion, trace-by-trace still most widely used method although it often suffers lack clarity because its high efficiency, which due parallel computing. This paper...