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Jian X.,Chengdu University of Technology | Zhu S.,North China University of Water Conservancy and Electric Power | Yang M.,Key Laboratory of Earth Exploration and Information Techniques
International Journal of Digital Content Technology and its Applications | Year: 2012

Three-dimensional geological modeling is a complex processes. This paper discusses a variety of complex models and uses 2D object contour lines. We made a simplification for all complex models, all models are reduced to two cases - - single and multi- contour lines. For a single contour line, using the cut-sewing method, and transforming the 3D problems into 2D unconstrained Delaunay triangulation problems, this can realize the matching and triangulation connection. For the case of multi- contour lines, we introduced the BPLI method and made some improvements about it. Use the idea of segment matching, we introduced Hausdorff distance into measuring the matching degree, this can improve the matching accuracy and reduces the computation, modeling in practice achieved a good results. Source

Zhou D.,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation | Zhou D.,Chengdu University of Technology | Wen X.,Chengdu University of Technology | Wen X.,Key Laboratory of Earth Exploration and Information Techniques | And 2 more authors.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2014

Matching pursuit has a wide range of applications in seismic spectrum decomposition, the time-frequency analysis, and thin-bed inversion. We propose in this paper a new matching pursuit approach based on dipole decomposition. We first build an over complete odd and even atomic dictionary based on the theory of dipole decomposition, and then decompose sparsely seismic signals by the matching pursuit in order to achieve thin-bed inversion of seismic reflection. Both model and real data tests show that the matching pursuit based on dipole decomposition has higher decomposition precision and better noise immunity than conventional matching pursuit methods. Source

Ye Y.,Chengdu University of Technology | Wang Y.-J.,Chengdu University of Technology | Zhou H.-L.,Chengdu University of Technology | Zhou H.-L.,Key Laboratory of Earth Exploration and Information Techniques | Ye T.-R.,Sinopec
Wutan Huatan Jisuan Jishu | Year: 2015

Geostatistical inversion, an inversion method, has improved vertical resolution on the basis of wave impedance. It combines stochastic simulation with seismic inversion, constrained by seismic data, and then predicts the distribution law of reservoir by simulating reservoir's spatial distribution characteristics. The method is an effective tool for quantitative prediction. Taking a block of Shifang gas field as an example, to perform geostatistical inversion based on sparse spike inversion of wave impedance and get a set of high-resolution lithological inversion body from the integrating seismic data and well data with geological data. According to comparison of the application for field data, it demonstrates that the prediction results coincide well with drilling, and prediction accuracy is improved obviously. In addition, the results of inversion provide a basis for subsequent calculation of gas reserves and production capacity building of development well. Source

Du G.-Y.,Xuchang University | Du G.-Y.,Chengdu University of Technology | Du G.-Y.,Key Laboratory of Earth Exploration and Information Techniques | Miao F.,Chengdu University of Technology | And 3 more authors.
Advanced Materials Research | Year: 2010

This paper proposes a novel digital earth platform framework, which is a application, service and decision-making support systems of geospatial data acquisition, storage, transmission, conversion, processing, analysis, retrieval, expression and output as a unified body, the core of which is to deal with geospatial data for spatial geographic information network service Geo-Browser/Geospatial Information Server (G/S) mode and Hyper Geographic Markup Language (HGML). Depth understanding and analysis of platform architecture, this paper realizes of digital earth platform prototype -U-Star based on the geospatial information network service G/S mode, the platform has the merits of C/S mode that full use of client resources, efficient to deal with the client data, as well as the advantages of B/S mode that the unified client and convenient to access network. This platform is a new server which can cope with massive geospatial information and a solution which can provide efficient service. It has already been applied into many fields, such as the digital tourism service system, the time sequence analysis of Wenchuan Earthquake, the real-time video monitoring based on the digital earth platform and the intelligent processing and exhibition of remote sensing data. The result indicates that the perfection of space, time and complexion of the geospatial information network accessing will effectively improve the quality and efficiency of the shared data, which has very important theoretical significance and bright prospect of application. Source

Wang Z.,Chengdu University of Technology | Wang Z.,Key Laboratory of Earth Exploration and Information Techniques | Wang X.,Chengdu University of Technology | Wang X.,Key Laboratory of Earth Exploration and Information Techniques | And 2 more authors.
International Journal of Geophysics | Year: 2012

Our seismic study together with the MT analysis reveal a R-shape flow existing in both the lower crust and uppermost mantle, which suggests the crustal deformation along the deep, large sutures (such as the Longmen Shan fault and the Anninghe Fault) under the southeastern Tibetan Plateau is maintained by dynamic pressure from the regional flow intermingled with the hot upwelling asthenosphere. The material in the lower crust and uppermost mantle flowing outward from the center of the plateau is buttressed by the old, strong lithosphere that underlies the Sichuan basin, pushing up on the crust above and maintaining steep orogenic belt through dynamic pressure. We therefore consider that the R-shape regional flow played a key role in the crustal deformation along the deep suture zones of the Bangong-Nujiang, the Longmen-Shan faults, and other local heavily faulted zones beneath the southeastern Tibetan Plateau. © 2012 Zhi Wang et al. Source

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