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Reservoir modeling for simulation purposes (view source)
Revision as of 15:01, 14 January 2014
, 15:01, 14 January 2014tidied tables
[[file:reservoir-modeling-for-simulation-purposes_fig1.png|thumb|{{figure number|1}}Classification of reservoir heterogeneity types.]]
[[file:reservoir-modeling-for-simulation-purposes_fig1.png|thumb|{{figure number|1}}Classification of reservoir heterogeneity types.]]
Simulation studies (see “Conducting a Reservoir Simulation Study: An Overview”) performed at early stages of field development are done to estimate parameters such as optimal well spacing, while at later stages the objectives may be infill drilling or secondary recovery. The role of the geologist is to provide reservoir models that give a sufficient description of those parameters that control the fluid flow relevant to the planned simulation study<ref name=pt10r14>Harris, D. G., 1975, The role of geology in reservoir simulation studies: Journal of Petroleum Technology, May, p. 625–632.</ref>. The key to effective and economic field development planning lies in early recognition of those reservoir characteristics that control drive mechanisms, sweep efficiency, and consequently, well spacing requirements and possible need for pressure support. The significance of the various heterogeneity types for oil recovery is summarized in Table 1.
Simulation studies (see “Conducting a Reservoir Simulation Study: An Overview”) performed at early stages of field development are done to estimate parameters such as optimal well spacing, while at later stages the objectives may be infill drilling or secondary recovery. The role of the geologist is to provide reservoir models that give a sufficient description of those parameters that control the fluid flow relevant to the planned simulation study<ref name=pt10r14>Harris, D. G., 1975, The role of geology in reservoir simulation studies: Journal of Petroleum Technology, May, p. 625–632.</ref>. The key to effective and economic field development planning lies in early recognition of those reservoir characteristics that control drive mechanisms, sweep efficiency, and consequently, well spacing requirements and possible need for pressure support. The significance of the various heterogeneity types for oil recovery is summarized in Table 1, where • denotes a strong effect, and × a moderate effect.
{| class = "wikitable"
{| class = "wikitable"
|+ {{table number|1}}Significance of reservoir heterogeneity type for oil recovery
|+ {{table number|1}}Significance of reservoir heterogeneity type for oil recovery
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! Reservoir
! Reservoir heterogeneity type || Reservoir continuity || Sweep efficiency — horiz || Sweep efficiency — vert || ROS in swept zones || Rock-fluid interactions
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| Sealing fault
| Sealing fault || • || • || || ||
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| •
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| Semi-sealing fault
| Semi-sealing fault
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| •
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| Nonsealing fault
| Nonsealing fault
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| •
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| Boundaries as genetic units
| Boundaries as genetic units
| •
| •
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| [[Permeability]] zonation
| [[Permeability]] zonation
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| within genetic units
| within genetic units
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| ×
| ×
| •
| •
| ×
| ×
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| Baffles
| Baffles
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| within genetic units
| within genetic units
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| ×
| ×
| •
| •
| ×
| ×
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| Laminations,
| Laminations,
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| cross-bedding
| cross-bedding
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| ×
| ×
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| •
| •
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| Microscopic
| Microscopic
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| heterogeneity
| heterogeneity
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| •
| •
| ×
| ×
| Textural types
| Textural types
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| •
| •
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| Mineralogy
| Mineralogy
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| Tight fracturing
| Tight fracturing
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| ×
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| •
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| Open fracturing
| Open fracturing
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| •
| •
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| •
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|+ {{table number|2}}Value of data for identification and quantification of reservoir heterogeneities
|+ {{table number|2}}Value of data for identification and quantification of reservoir heterogeneities
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! Reservoir
! Reservoir heterogeneity type
! Detailed
! Detailed seismic
! Reservoir Pressure
! Reservoir pressure — horiz
! Production Data/Tests
! Reservoir pressure — vert
! Well Logging
! Production data/tests — Prod
! Rock Samples
! Production data/tests — Pulse
! Outcrop or Analog
! Production data/tests — Tracer
! Heterogeneity Type
! Production data/tests — Hist
! Seismic
! Production data/tests — Logs
! Hor. Distrib.
! Well logging — Standard
! Vert. Distrib.
! Well logging — Special
! Prod. Tests
! Well logging — ROS
! Pulse Tests
! Rock samples — Cores
! Tracer Tests
! Rock samples — SWS cuttings
! Outcrop or analog reservoir
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| Sealing fault
| Sealing fault
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| •
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| •
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| ×
| ×
| ×
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| ×
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| •
| •
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| ×
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| •
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| Boundaries as
| Boundaries as
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| genetic units
| genetic units
| Permeability zonation
| Permeability zonation
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| within genetic units
| within genetic units
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| ×
| ×
| ×
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| ×
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| ×
| •
| •
| Baffles
| Baffles
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| within genetic units
| within genetic units
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| ×
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| •
| •
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| Microscopic
| Microscopic
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| heterogeneity,
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| textural types,
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| mineralogy
| mineralogy
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| ×
| ×
| ×
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| Tight fracturing
| Tight fracturing
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| •
| •
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* [http://store.aapg.org/detail.aspx?id=612 Find the book in the AAPG Store]
* [http://store.aapg.org/detail.aspx?id=612 Find the book in the AAPG Store]
[[Category:Reservoir engineering methods]]
[[Category:Reservoir engineering methods]] [[Category:Pages with badly formatted tables]]