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Line 28: − + − + − + − + − {| class = "wikitable"+ − |-+ − ! Step+ − ! Action+ − |-+ − | 1+ − | Select a key well(s) for detailed petrophysical analysis (see [[Petrophysical analysis of lithofacies]]).+ − |-+ − | 2 − | Subdivide the reservoir in the key well(s) into flow units (see [[Flow units for reservoir characterization]]). − |- − | 3 − | Determine pore type for each flow unit in the key well using [[core description]]s, thin section and SEM analysis, [[porosity]]/[[permeability]]–r<sub>35</sub> analysis, S<sub>w</sub> –depth plot, [[Buckles plot]], etc. − |- − | 4 − | Construct stratigraphic strike and dip cross sections that include the key well. Use a region/fieldwide time marker at the top of the reservoir as the datum. − |- − | 5 − | Subdivide the reservoir interval of each well into flow units. − − | 6 − | Correlate flow units between wells and subdivide the reservoir into containers by determining which flow units interact during drainage. − |- − | 7 − | Determine hydrocarbon volume by computing the volume of pay by flow unit for each container. − |- − | 8 − | Predict performance in terms of recovery amount and time by incorporating the above analysis with expected fluid properties and drive mechanism (see [[Drive mechanisms and recovery]]). Predictions should compare well with performance of analog reservoir systems. − |} Line 68:
Line 49: − + − * [[What is a reservoir system?]] Line 81:
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added Category:Treatise Handbook 3 using HotCat
{{merge|Reservoir system}}
{{publication
{{publication
| image = exploring-for-oil-and-gas-traps.png
| image = exploring-for-oil-and-gas-traps.png
| part = Predicting the occurrence of oil and gas traps
| part = Predicting the occurrence of oil and gas traps
| chapter = Predicting reservoir system quality and performance
| chapter = Predicting reservoir system quality and performance
| frompg = 9-1
| frompg = 9-6
| topg = 9-156
| topg = 9-6
| author = Dan J. Hartmann, Edward A. Beaumont
| author = Dan J. Hartmann, Edward A. Beaumont
| link = http://archives.datapages.com/data/specpubs/beaumont/ch09/ch09.htm
| link = http://archives.datapages.com/data/specpubs/beaumont/ch09/ch09.htm
==Reservoir performance==
==Reservoir performance==
The fundamental goal of the explorationist is to predict the performance that a reservoir will have over the production life of the field. Reservoir performance affects the economic viability of a play or prospect and is a function of reservoir system quality. Performance is expressed by
The fundamental goal of the explorationist is to predict the performance that a [[reservoir]] will have over the production life of the field. Reservoir performance affects the economic viability of a play or prospect and is a function of reservoir system quality. Performance is expressed by
* Initial production rate and production rate decline over time
* Initial production rate and production rate decline over time
* Pore throat size distribution and pore geometry (including natural fractures; see also [[Pore and pore throat sizes]])
* Pore throat size distribution and pore geometry (including natural fractures; see also [[Pore and pore throat sizes]])
* Pore volume
* Pore volume
* Permeabilities to hydrocarbon
* [[Permeability]] to hydrocarbon
* [[Water saturation]] (hydrocarbon pore volume)
* [[Water saturation]] (hydrocarbon pore volume)
* Lateral continuity, number, and position of flow units and containers
* [[Lateral]] continuity, number, and position of flow units and containers
* Reservoir pressure and drive mechanism
* Reservoir pressure and [[Reservoir drive mechanisms|drive mechanism]]
==Procedure for reservoir system analysis==
==Procedure for reservoir system analysis==
Below is a suggested procedure for reservoir system analysis.
Below is a suggested procedure for reservoir system analysis:
# Select a key well(s) for detailed petrophysical analysis (see [[Petrophysical analysis of lithofacies]]).
# Subdivide the reservoir in the key well(s) into flow units (see [[Flow units for reservoir characterization]]).
# Determine pore type for each flow unit in the key well using [[core description]]s, [[Thin section analysis|thin section]] and [[Scanning electron microscopy (SEM)|scanning electron microscopy]] analysis, [[porosity]]/[[permeability]]–[[Characterizing_rock_quality#What_is_r35.3F|r<sub>35</sub>]] analysis, [[Water saturation]] –depth plot, [[Buckles plot]], etc.
# Construct stratigraphic [[strike]] and [[dip]] [[cross section]]s that include the key well. Use a region/fieldwide time marker at the top of the reservoir as the datum.
# Subdivide the reservoir interval of each well into flow units.
# Correlate [[Flow units for reservoir characterization|flow units]] between wells and subdivide the reservoir into containers by determining which flow units interact during drainage.
# Determine hydrocarbon volume by computing the volume of pay by flow unit for each container.
# Predict performance in terms of recovery amount and time by incorporating the above analysis with expected fluid properties and drive mechanism (see [[Drive mechanisms and recovery]]). Predictions should compare well with performance of analog reservoir systems.
|-
==Selecting a key well==
==Selecting a key well==
==See also==
==See also==
* [[Reservoir system basics]]
* [[Reservoir system]]
* [[Defining flow units and containers]]
* [[Defining flow units and containers]]
* [[Reservoir drive mechanisms]]
* [[Reservoir drive mechanisms]]
[[Category:Predicting the occurrence of oil and gas traps]]
[[Category:Predicting the occurrence of oil and gas traps]]
[[Category:Predicting reservoir system quality and performance]]
[[Category:Predicting reservoir system quality and performance]]
[[Category:Treatise Handbook 3]]