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Title: Automated grid generation from models of complex geologic structure and stratigraphy

Abstract

The construction of computational grids which accurately reflect complex geologic structure and stratigraphy for flow and transport models poses a formidable task. With an understanding of stratigraphy, material properties and boundary and initial conditions, the task of incorporating this data into a numerical model can be difficult and time consuming. Most GIS tools for representing complex geologic volumes and surfaces are not designed for producing optimal grids for flow and transport computation. We have developed a tool, GEOMESH, for generating finite element grids that maintain the geometric integrity of input volumes, surfaces, and geologic data and produce an optimal (Delaunay) tetrahedral grid that can be used for flow and transport computations. GEOMESH also satisfies the constraint that the geometric coupling coefficients of the grid are positive for all elements. GEOMESH generates grids for two dimensional cross sections, three dimensional regional models, represents faults and fractures, and has the capability of including finer grids representing tunnels and well bores into grids. GEOMESH also permits adaptive grid refinement in three dimensions. The tools to glue, merge and insert grids together demonstrate how complex grids can be built from simpler pieces. The resulting grid can be utilized by unstructured finite element or integratedmore » finite difference computational physics codes.« less

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
226409
Report Number(s):
LA-UR-96-1083; CONF-960164-3
ON: DE96009768; TRN: 96:002820
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 3. international conference/workshop on integrating GIS and environmental modeling, Santa Fe, NM (United States), 21-25 Jan 1996; Other Information: PBD: 1996
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; POROUS MATERIALS; COMPUTERIZED SIMULATION; FLUID FLOW; AQUIFERS; ENVIRONMENTAL TRANSPORT; G CODES; GEOLOGIC STRUCTURES; STRATIGRAPHY

Citation Formats

Gable, C, Trease, H, and Cherry, T. Automated grid generation from models of complex geologic structure and stratigraphy. United States: N. p., 1996. Web.
Gable, C, Trease, H, & Cherry, T. Automated grid generation from models of complex geologic structure and stratigraphy. United States.
Gable, C, Trease, H, and Cherry, T. 1996. "Automated grid generation from models of complex geologic structure and stratigraphy". United States. https://www.osti.gov/servlets/purl/226409.
@article{osti_226409,
title = {Automated grid generation from models of complex geologic structure and stratigraphy},
author = {Gable, C and Trease, H and Cherry, T},
abstractNote = {The construction of computational grids which accurately reflect complex geologic structure and stratigraphy for flow and transport models poses a formidable task. With an understanding of stratigraphy, material properties and boundary and initial conditions, the task of incorporating this data into a numerical model can be difficult and time consuming. Most GIS tools for representing complex geologic volumes and surfaces are not designed for producing optimal grids for flow and transport computation. We have developed a tool, GEOMESH, for generating finite element grids that maintain the geometric integrity of input volumes, surfaces, and geologic data and produce an optimal (Delaunay) tetrahedral grid that can be used for flow and transport computations. GEOMESH also satisfies the constraint that the geometric coupling coefficients of the grid are positive for all elements. GEOMESH generates grids for two dimensional cross sections, three dimensional regional models, represents faults and fractures, and has the capability of including finer grids representing tunnels and well bores into grids. GEOMESH also permits adaptive grid refinement in three dimensions. The tools to glue, merge and insert grids together demonstrate how complex grids can be built from simpler pieces. The resulting grid can be utilized by unstructured finite element or integrated finite difference computational physics codes.},
doi = {},
url = {https://www.osti.gov/biblio/226409}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {4}
}

Conference:
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