Collaborative 3D geological modeling analysis based on multi-source data standard

Zhang, Qi; He-hua, Zhu

doi:10.1016/j.enggeo.2018.10.001

Cited by 46 publications

(17 citation statements)

References 29 publications

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“…The semivariogram is the geostatistical tool commonly used in seismology to model the spatial correlation of earthquake ground motion 7,6,8,10,33 as well as the geological data 34,35 . The semivariogram γ quantifies the average dissimilarity between variable

Z

at locations

x_{i}

and

x_{j}

γ = \frac{1}{2} V a r (Z_{x_{i}} - Z_{x_{j}}) = \frac{1}{2} E [{(Z_{x_{i}} - Z_{x_{j}})}^{2}]

where

V a r

and

E

denote the variance and expected value, respectively.…”

Section: Geostatistical Tools To Model Spatial Correlation Of Ground Motionsmentioning

confidence: 99%

Spatial correlation of broadband ground motions from physics‐based numerical simulations

Infantino

Smerzini

Lin

2021

Earthq Engng Struct Dyn

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This study assesses the spatial correlation of broadband earthquake ground motions from 3D physics-based numerical simulations in near-source conditions. State-of-the-art models for predicting the spatial correlation are derived from wide datasets including densely recorded earthquakes in different areas worldwide and, therefore, they may be poorly representative of specific regions and near-source effects. A large set of broadband ground motions simulated by the SPEED code, and enriched in the high-frequency range with an Artificial Neural Network technique, is used to investigate the sensitivity of crucial parameters in geostatistical analysis (number of receivers), as well as of source, path, and site effects on spatial correlation, with a level of detail which could not be possible otherwise due to the paucity of recordings. First of all, the comparison of our results with those derived from earthquake recordings validates successfully the numerical approach in predicting the spatial correlation in a broad frequency range. Furthermore, the study points out that spatial correlation of response spectral accelerations is significantly affected by the magnitude, forward directivity effects, ground-motion directionality (fault normal versus fault parallel), and relative position from the causative fault. These features may make critical the use of isotropic and stationary models especially in near-fault conditions.

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Z

at locations

x_{i}

and

x_{j}

γ = \frac{1}{2} V a r (Z_{x_{i}} - Z_{x_{j}}) = \frac{1}{2} E [{(Z_{x_{i}} - Z_{x_{j}})}^{2}]

where

V a r

and

E

denote the variance and expected value, respectively.…”

Section: Geostatistical Tools To Model Spatial Correlation Of Ground Motionsmentioning

confidence: 99%

Spatial correlation of broadband ground motions from physics‐based numerical simulations

Infantino

Smerzini

Lin

2021

Earthq Engng Struct Dyn

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“…In existing engineering applications, the imaging data during drilling are generally expanded along an angle into a two-dimensional map, and different colors are used to represent the changes of the data. It is difficult to understand the spatial changes of the wellbore and the trend of the formation from these images [24]. The existing spatial expansion also uses conventional three-dimensional graphics and image technology to establish the borehole surface, and rendering technology is used to add color to the surface.…”

Section: Methods For Wellbore Attribute Assignmentmentioning

confidence: 99%

Method of Real-Time Wellbore Surface Reconstruction Based on Spiral Contour

Wang

2021

Energies

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A wellbore surface is an irregular surface structure. The distribution of points on the wellbore surface measured based on the drilling diameter is not uniform. Thus, the conventional modeling method based on a point cloud cannot satisfy the needs of real-time measurement updating and wellbore display. This study proposes a spiral profile method for drilling shaft surface reconstruction. Scattered data along the drilling diameter are measured, and an inverse distance weighting cylindrical space surface algorithm with iterative interpolation is used to obtain the spiral angle and pitch of a relatively homogeneous helical contour line along the surface of the shaft. Using sets of four adjacent points in the spiral, quadrilaterals are formed, and then all obtained quadrilaterals are used to form the wellbore inner surface structure. This method can further construct the outer surface spiral contour line to advance the quadrilateral surface to the spatial hexahedron structure. The caliper and gamma measurement data obtained from the calibrated wellbore were used to verify the real-time surface reconstruction and fusion while drilling. The homogenized reconstructed surface profile is more than 99.5% similar to the actual measurement. Proved by experiment and application, this method has very high real-time performance, and the three-dimensional stereo imaging wellbore with additional gamma attributes has good visual effects.

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“…2020, 9, 389 6 of 17 difficult to spatialize the borehole data. Therefore, there is a large amount of interpolation processing in the subsequent intelligent 3D modeling [15].…”

Section: Characteristics Of Papery Borehole Logsmentioning

confidence: 99%

Urban Geological 3D Modeling Based on Papery Borehole Log

Zhang

et al. 2020

IJGI

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Borehole log is important data for urban geological 3D modeling. Most of the current borehole logs are stored in a papery form. The construction of a smart city puts forward requirements for the automatic and intelligent 3D modeling of urban geology. However, it is difficult to extract the information from the papery borehole log quickly. What is more, it is unreliable to rely entirely on automated algorithms for modeling without artificial participation, but there is no effective way to integrate geological knowledge into 3D geological modeling currently. Therefore, it is necessary to research how to use existing papery borehole logs efficiently. To overcome the above obstacles, we designed a method that combines structural analysis and layout understanding to extract information from the borehole log. Then, the knowledge-driven three-dimensional geological modeling is proposed based on dynamic profiles. With these methods, the papery borehole log can be converted into structured data which can be used for data analysis directly, and geological knowledge can be integrated into the process of 3D geological modeling. The 3D geological modeling of Xinyang City based on a papery borehole log has been taken as an example to verify the feasibility of the method.

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Collaborative 3D geological modeling analysis based on multi-source data standard

Cited by 46 publications

References 29 publications

Spatial correlation of broadband ground motions from physics‐based numerical simulations

Spatial correlation of broadband ground motions from physics‐based numerical simulations

Method of Real-Time Wellbore Surface Reconstruction Based on Spiral Contour

Urban Geological 3D Modeling Based on Papery Borehole Log

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