3-D prestack depth migration and velocity model building

Jones, Ian F.; Ibbotson, Keith; Grimshaw, M.; Plasterie, P.

doi:10.1190/1.1438063

Cited by 20 publications

(8 citation statements)

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“…1, we see a preSDM seismic section from this 3D survey, after the last iteration of CRP-scan model building and residual move-out (RMO) correction. Here, the velocity-depth model was constructed using the iterative CRP-scan technique (Audebert & Diet 1996;Jones et al 1998b) on a 3006300 m grid, and the RMO correction was estimated continuously on lines separated by 37.5 m, sampled every 12.5 m along the lines. Figures 2 and 3 show the interval velocity model for this line resulting from iterative CRP-scan picking, and its corresponding RMS field.…”

Section: Resultsmentioning

confidence: 99%

Velocity as an attribute: continuous velocity estimation from 3D preSDM CRP gathers

Jones¹,

Baud²

2001

First Break

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Section: Resultsmentioning

confidence: 99%

Velocity as an attribute: continuous velocity estimation from 3D preSDM CRP gathers

Jones¹,

Baud²

2001

First Break

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“…Velocity model update was performed using CRP‐scanning, the CRP’s being computed from perturbed suites of travel times ( Audebert & Diet 1996; Jones et al . 1998) .…”

Section: Methodsmentioning

confidence: 99%

The effect of acquisition direction on preSDM imaging

et al. 2000

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“…Further difficulties exist when trying to detect small structures, such as small-scale faults or particular fault zone features, like fault core, fault throw or damage zone [68]. Identification of steeply inclined fault zones is complex [65,69,70] and although different migration techniques exist [67,71,72], finding the correct fault dip remains difficult for the seismic interpreter. Thus, a frequently used simplification in reservoir modeling is to assume vertical faults, i.e., a fault dip of 90 • .…”

Section: Fault Dipmentioning

confidence: 99%

Faults as Volumetric Weak Zones in Reservoir-Scale Hydro-Mechanical Finite Element Models—A Comparison Based on Grid Geometry, Mesh Resolution and Fault Dip

Treffeisen

Henk

2020

Energies

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An appropriate representation of faults is fundamental for hydro-mechanical reservoir models to obtain robust quantitative insights into the spatial distribution of stress, strain and pore pressure. Using a generic model containing a reservoir layer displaced by a fault, we examine three issues which are typically encountered if faults have to be incorporated in reservoir-scale finite element simulations. These are (1) mesh resolution aspects honoring the scale difference between the typical cell size of the finite element (FE) reservoir model and the heterogeneity of a fault zone, (2) grid geometry relative to the fault geometry and (3) fault dip. Different fault representations were implemented and compared regarding those on the modeling results. Remarkable differences in the calculated stress and strain patterns as well as the pore pressure field are observed. The modeling results are used to infer some general recommendations concerning the implementation of faults in hydro-mechanical reservoir models regarding mesh resolution and grid geometry, taking into account model-scale and scope of interest. The goal is to gain more realistic simulations and, hence, more reliable results regarding fault representation in reservoir models to improve production, lower cost and reduce risk during subsurface operations.

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3-D prestack depth migration and velocity model building

Cited by 20 publications

References 0 publications

Velocity as an attribute: continuous velocity estimation from 3D preSDM CRP gathers

Velocity as an attribute: continuous velocity estimation from 3D preSDM CRP gathers

The effect of acquisition direction on preSDM imaging

Faults as Volumetric Weak Zones in Reservoir-Scale Hydro-Mechanical Finite Element Models—A Comparison Based on Grid Geometry, Mesh Resolution and Fault Dip

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