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Line 21: − + − ! Migration factors − + − − + − − + − − + − + − {| class = "wikitable"+ − |-+ − ! Step+ − ! Action+ − |-+ − | 1+ − | Calculate the volume of hydrocarbons generated by the [[source rock]], using the formula ''V'' = ''A'' × ''T'' × ''Y'' × ''M'', where:+ − + − + − − − − |- − | 2 − | Estimate the proportion of the source rock that supplied hydrocarbons to the area in which the trap is located (drainage area). Use a map of the mature source rock. − |- − | 3 − | Estimate the efficiency of the migration process. For example, did 20% of the generated hydrocarbons travel from the source rock to the trap? − |- − | 4 − | Calculate the volume of migrated hydrocarbons available to fill the trap − |} Line 67:
Line 50: − The upper map below is a hypothetical migration pathway map. The lower map shows the thickness of source rock, the top of the oil and gas windows, and the drainage areas for two traps labeled A and B of the same area shown in the upper map. The drainage areas for traps A and B were made using the migration pathway map. − + + + Line 142:
Line 126: − * [[Calculating migration rate and charge volume]]+ Line 153:
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added Category:Treatise Handbook 3 using HotCat
| part = Critical elements of the petroleum system
| part = Critical elements of the petroleum system
| chapter = Migration of petroleum
| chapter = Migration of petroleum
| frompg = 7-1
| frompg = 7-32
| topg = 7-38
| topg = 7-34
| author = Martin D. Matthews
| author = Martin D. Matthews
| link = http://archives.datapages.com/data/specpubs/beaumont/ch07/ch07.htm
| link = http://archives.datapages.com/data/specpubs/beaumont/ch07/ch07.htm
{| class = "wikitable"
{| class = "wikitable"
|-
|-
! [[Source rock]] factors
! Source rock factors || Migration factors
|-
|-
| Drainage area
| Drainage area || [[Lateral]] migration distance
| Lateral migration distance
|-
|-
| Thickness
| Thickness || Vertical migration distance
| Vertical migration distance
|-
|-
| Potential ultimate yield
| Potential ultimate yield || Lateral migration factor*
| Lateral migration factor <xref ref-type="table-fn" rid="ch07tblfn1"> * </xref>
|-
|-
| Yield fraction timing
| Yield fraction timing || Vertical migration factor*
| Vertical migration factor <xref ref-type="table-fn" rid="ch07tblfn1"> * </xref>
|}
|}
<sup>* A function of lithology, depth, degree of fracturing, and/or faulting</sup>
==Procedure==
==Procedure==
The table below lists a procedure for estimating the volume of migrated hydrocarbons available to fill a trap.
The table below lists a procedure for estimating the volume of migrated hydrocarbons available to fill a trap.
# Calculate the volume of hydrocarbons generated by the [[source rock]], using the formula <math>\text{V} = \text{A} \times \text{T} \times \text{Y} \times \text{M}</math>, where:
#* ''V'' = potential charge volume
#* ''A'' = area
#* ''T'' = source rock thickness
#* ''Y'' = hydrocarbon yield per volume of source from each [[kerogen]] facies and maturity class
#* ''M'' = migration efficiency
# Estimate the proportion of the source rock that supplied hydrocarbons to the area in which the trap is located (drainage area). Use a map of the mature source rock.
* ''V'' = potential charge volume
# Estimate the efficiency of the migration process. For example, did 20% of the generated hydrocarbons travel from the source rock to the trap?
* ''A'' = area
# Calculate the volume of migrated hydrocarbons available to fill the trap
* ''T'' = source rock thickness
* ''Y'' = hydrocarbon yield per volume of source from each kerogen facies and maturity class
* ''M'' = migration efficiency
==Estimating drainage area==
==Estimating drainage area==
==Example drainage map==
==Example drainage map==
[[file:migration-of-petroleum_fig7-12.png|thumb|{{figure number|7-12}}See text for explanation.]]
[[file:migration-of-petroleum_fig7-12.png|300px|thumb|{{figure number|1}}Hypothetical migration pathway map.]]
[[:file:migration-of-petroleum_fig7-12.png|Figure 1]] is a hypothetical [[migration pathway]] map. The lower map shows the thickness of source rock, the top of the oil and gas windows, and the drainage areas for two traps labeled A and B of the same area shown in the upper map. The drainage areas for traps A and B were made using the migration pathway map.
==Example of calculating volume==
==Example of calculating volume==
==See also==
==See also==
* [[Calculating migration rate]]
* [[Calculating migration rate]]
* [[Estimating expulsion efficiency]]
* [[Estimating expulsion efficiency]]
[[Category:Critical elements of the petroleum system]]
[[Category:Critical elements of the petroleum system]]
[[Category:Migration of petroleum]] [[Category:Pages with bad references]]
[[Category:Migration of petroleum]] [[Category:Pages with bad references]]
[[Category:Treatise Handbook 3]]