Changes

  | 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

! 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>

|}

|}

==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

| Calculate the volume of hydrocarbons generated by the [[source rock]], using the formula ''V'' = ''A'' × ''T'' × ''Y'' × ''M'', where:

# 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

| 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.

| Estimate the efficiency of the migration process. For example, did 20% of the generated hydrocarbons travel from the source rock to the trap?

| Calculate the volume of migrated hydrocarbons available to fill the trap

==Estimating drainage area==

==Estimating drainage area==

It is important to make a migration map showing the location of the source rock facies and the drainage areas that feed the areas of interest. The map is best drawn for the time when [[maturation]] analysis indicates the hydrocarbons should be migrating. A rougher estimate can be made from a map or the stucture as it exists today. A drainage map is made from the migration map. It should include estimates of maturity and hydrocarbon yield in an appropriate number of area classes. Subareas within these classes are defined by thickness and yield variation within the total drainage area.

It is important to make a migration map showing the location of the source rock facies and the drainage areas that feed the areas of interest. The map is best drawn for the time when [[maturation]] analysis indicates the hydrocarbons should be migrating. A rougher estimate can be made from a map or the stucture as it exists today. A drainage map is made from the migration map. It should include estimates of maturity and hydrocarbon yield in an appropriate number of area classes. Subareas within these classes are defined by thickness and yield variation within the total drainage area.

==Example drainage map==

[[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.

 

[[: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]]