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| + | {{merge|Reservoir system}} |
| + | |
| {{publication | | {{publication |
| | image = exploring-for-oil-and-gas-traps.png | | | image = exploring-for-oil-and-gas-traps.png |
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| | 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 |
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| ==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 |
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| * 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: |
| | | |
− | {| class = "wikitable"
| + | # 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]]). |
− | ! Step
| + | # 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. |
− | ! Action
| + | # 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. |
− | | 1
| + | # Correlate [[Flow units for reservoir characterization|flow units]] between wells and subdivide the reservoir into containers by determining which flow units interact during drainage. |
− | | Select a key well(s) for detailed petrophysical analysis (see [[Petrophysical analysis of lithofacies]]).
| + | # 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. |
− | | 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.
| |
− | |}
| |
| | | |
| ==Selecting a key well== | | ==Selecting a key well== |
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| | | |
| ==See also== | | ==See also== |
− | * [[Reservoir system basics]] | + | * [[Reservoir system]] |
− | * [[What is a reservoir system?]]
| |
| * [[Defining flow units and containers]] | | * [[Defining flow units and containers]] |
| * [[Reservoir drive mechanisms]] | | * [[Reservoir drive mechanisms]] |
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| [[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]] |