Editing and rapidly updating a 3D Earth model

Euler, Nicolas; Sword, Charles H.; Dulac, Jean Claude

doi:10.1190/1.1821267

Cited by 6 publications

(5 citation statements)

References 1 publication

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“…As compared to a method using a surface cut algorithm [6], most node insertions are avoided, yielding more robust and efficient updates.…”

Section: Resultsmentioning

confidence: 99%

“…Such modifications may be used for time-to-depth conversion in geophysical processing [10,34,6] or for generating several equiprobable geometric realizations that honor the data [14]. In this work, we have tackled more specifically the demanding aspects of interactive expert editing.…”

Section: Volume Modeling In Geosciencesmentioning

confidence: 99%

“…In [6], an interface can be removed from the model, globally modified under geometric constraints, and reincorporated into the volume model using a surface "cut with constraints" operation that honors contacts. For the user, this operation is quite flexible, but it requires a complete model reconstruction, as the modifications may imply drastic changes in the model definition.…”

Section: Related Workmentioning

confidence: 99%

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Constrained modifications of non-manifold B-reps

Caumon¹,

Sword

Mallet³

2003

Proceedings of the Eighth ACM Symposium on Solid Modeling and Applications

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Non-manifold boundary representations (b-reps) are increasingly used in Geosciences for a variety of applications (3D geographical information systems, basin modeling, geophysical processing, etc.). Meanwhile, the uncertainties associated with subsurface data make it desirable to modify such models efficiently. We present a method to deform locally a surface in a triangulated b-rep while maintaining a constant number of spatial regions in the model. This method does not require completely rebuilding the model, and thus allows efficient and robust updates of the model definition. The method requires that the reshaped surface does not intersect the boundaries of its adjoining regions, which can be checked using existing collision detection algorithms. Also, the non-manifold contacts must be updated after the modification, and the triangles must be altered, to maintain sealed regions. For this, we propose to parameterize locally the surfaces that the modified surface moves along. This parametric space is used to 1) constrain the displacement of the deformed surface border and, 2) re-triangulate in the plane the neighboring surfaces around the modified contacts. The method, tested in the context of an interactive graphical manipulator, is very efficient and independent from the deformation mechanism.

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“…As compared to a method using a surface cut algorithm [6], most node insertions are avoided, yielding more robust and efficient updates.…”

Section: Resultsmentioning

confidence: 99%

Section: Volume Modeling In Geosciencesmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Constrained modifications of non-manifold B-reps

Caumon¹,

Sword

Mallet³

2003

Proceedings of the Eighth ACM Symposium on Solid Modeling and Applications

Self Cite

View full text Add to dashboard Cite

show abstract

“…Gjøystdal, Reinhardsen, andÅstebøl (1985) propose to modify oriented free-form surfaces and recompute the model definition using a grid and boolean operations. Euler, Sword, and Dulac (1999) describe how an interface can be removed from the model, globally modified under geometric constraints, and reincorporated into the volume model using a surface "cut with constraints" operation that honors contacts. This operation is general and flexible, but requires a complete reconstruction of the model.…”

Section: Previous Workmentioning

confidence: 99%

“…During recent decades, several topological representations have been proposed to model geological structures with b-reps (Gjøystdal, Reinhardsen, andÅstebøl, 1985;Lamboglia, 1994;Halbwachs and others, 1996;Mello and Henderson, 1997;Lévy, 1999;Euler, Sword, and Dulac, 1999;Hubeli, 2002). Although most provide the required flexibility, actual models have proven difficult to build and update.…”

Section: Introductionmentioning

confidence: 99%

Building and Editing a Sealed Geological Model

Caumon

Lepage²,

Sword

et al. 2004

Mathematical Geology

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In Solid Modeling, a boundary representation (b-rep) defines solids by their bounding surfaces, providing an efficient volume description. Building on this representation, we present the notion of a Sealed Geological Model. In such a model, the geological surfaces define a partition of the domain of interest into regions; analytic functions can be defined in these regions to describe the spatial variations of the subsurface properties. Such descriptions can be used in Geophysics, 3D GIS, and for discretization purposes. In addition to the b-rep representational validity conditions, Sealed Geological Models must satisfy conditions of geological consistency. Bearing these conditions in mind, we describe a methodology to create and modify the shape of such sealed models interactively. We use the hierarchical relationship between geological surfaces to help reshape the contact between a fixed surface (a surface that other surfaces can slide along, such as a fault, erosion surface, or salt top) and a secondary deformable surface (e.g. horizon, older fault). Although designed to meet the demanding requirements of interactive model editing, our methodology could also make use of displacement vectors computed by an automatic process such as tomographic inversion or 3D balanced unfolding.

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Three-Dimensional Integrated Geo-Static Modeling for Prospect Identification and Reserve Estimation in the Middle Miocene Multi-Reservoirs: A Case Study from Amal Field, Southern Gulf of Suez Province

Amer,

Mabrouk,

Soliman

et al. 2023

Nat Resour Res

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Middle Miocene reservoirs in the southern part of the Gulf of Suez province are characterized by geometrical uncertainties due to their structural settings, lateral facies change, different lithologies, and diverse reservoir quality. Therefore, in this study, detailed 3D geo-static models were constructed by integrating multiple datasets, including 2D seismic sections and digital well-logs. The 3D models were constructed for the Belayim Formation (Hammam Faraun Member), Kareem Formation (Markha Member), and Rudies Formation (Upper Rudies Member) with detailed structuration, zonation, and layering for Amal Field in the southern Gulf of Suez province to assess the hydrocarbon potential, calculate accurate reserves, recommend development and exploration plans, and propose locations for future drilling. The resultant structural model exhibited a compartmentalized area of major and minor normal faults trending NW–SE, forming structurally high potential hydrocarbon trapping locations in the study area. The petrophysical models indicated the good potentiality of Hammam Faraun as a reservoir with porosity values of 15–23%, increasing towards the central part of the area, volume of shale (Vsh) of 21–31%, water saturation (Sw) of 34–49%, and sand thickness increasing toward the northeastern part of the area. The Markha Member was also interpreted as a good reservoir, with porosity values of 15–22%, increasing towards the southeastern part of the area, Vsh of 13–29%, Sw of 16–38%, and sandy facies accumulating in the central horst block. Upper Rudies exhibits good reservoir properties with porosity values of 16–23%, Vsh of 29–37%, Sw of 35–40%, and good sandy facies in the central horst block of the area. The study results showed hydrocarbon potential in the central horst block of the study area for the Middle Miocene multi-reservoirs.

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Editing and rapidly updating a 3D Earth model

Cited by 6 publications

References 1 publication

Constrained modifications of non-manifold B-reps

Constrained modifications of non-manifold B-reps

Building and Editing a Sealed Geological Model

Three-Dimensional Integrated Geo-Static Modeling for Prospect Identification and Reserve Estimation in the Middle Miocene Multi-Reservoirs: A Case Study from Amal Field, Southern Gulf of Suez Province

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