Changes

  | part    = Predicting the occurrence of oil and gas traps

  | part    = Predicting the occurrence of oil and gas traps

  | chapter = Exploring for structural traps

  | chapter = Exploring for structural traps

  | frompg  = 20-1

  | frompg  = 20-61

  | topg    = 20-70

  | topg    = 20-61

  | author  = R.A. Nelson, T.L. Patton, S. Serra

  | author  = R.A. Nelson, T.L. Patton, S. Serra

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch20/ch20.htm

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch20/ch20.htm

==What is a structural style?==

==What is a structural style?==

Structural styles or structural families are associations of structures that often occur together due to a common origin. For example, major [[foreland thrust belt]]s usually contain a mixture of [[listric]] [[reverse]] or [[decollement]] [[thrust fault]]s, large asymmetric [[hanging wall]] folds, and late listric [[normal fault]]s. These features are arranged to form an overall arcuate deformed belt. There is little or no involvement of mechanical [[basement]] in the deformation. Individual structures generally have good [[strike]] continuity and poor depth or [[dip]] continuity. Hence, in any newly discovered thrust belt, these same associations (thrust belt structural style) would be anticipated, modified somewhat by local geology. The concept of structural styles and their classification are given in Harding and Lowell<ref name=Harding_Lowell_1979>Harding, T. P., and J. D. Lowell, 1979, Structural styles, their plate-tectonic habitats and hydrocarbon traps in petroleum provinces: AAPG Bulletin, v. 63, p. 1016-1058.</ref> and Lowell.<ref name=ch20r215>Lowell, J., D., 1985, Structural Styles in Petroleum Exploration: Tulsa, OGCI, 460 p.</ref>

Structural styles or structural families are associations of structures that often occur together due to a common origin. For example, major [[foreland thrust belt]]s usually contain a mixture of [[listric]], [[reverse]], or [[decollement]] [[thrust fault]]s, large asymmetric [[hanging wall]] folds, and late listric [[normal fault]]s. These features are arranged to form an overall arcuate deformed belt. There is little or no involvement of mechanical [[basement]] in the [[deformation]]. Individual structures generally have good [[strike]] continuity and poor depth or [[dip]] continuity. Hence, in any newly discovered thrust belt, these same associations (thrust belt structural style) would be anticipated, modified somewhat by local geology. The concept of structural styles and their classification are given in Harding and Lowell<ref name=Harding_Lowell_1979>Harding, T. P., and J. D. Lowell, 1979, [http://archives.datapages.com/data/bulletns/1977-79/data/pg/0063/0007/1000/1016.htm Structural styles, their plate-tectonic habitats and hydrocarbon traps in petroleum provinces]: AAPG Bulletin, v. 63, p. 1016-1058.</ref> and Lowell.<ref name=ch20r215>Lowell, J., D., 1985, Structural Styles in Petroleum Exploration: Tulsa, OGCI, 460 p.</ref>

==Choosing techniques==

==Choosing techniques==

If and when a structural style(s) is ascribed to an area, certain of the structural techniques become more important to perform than others. The list below displays those techniques (keyed to the numbers in [[:file:Exploring-for-structural-traps fig20-4.png|Figure 2]] of [[Structural exploration workflow]]) deemed important for each major structural style.

 

 

If and when one or more structural styles are ascribed to an area, certain of the structural techniques become more important to perform than others. The list below displays those techniques (keyed to the numbers in [[:file:Exploring-for-structural-traps fig20-4.png|Figure 1]].

{| class = "wikitable"

{| class = "wikitable"

|-

|-

! Style

! Style || Very Important*

! Very Important*

|-

|-

| Thrust belts

| [[Thrust belt]]s || 5, 8, 10, 12

| 5, 8, 10, 12

|-

|-

| Wrench systems

| [http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=wrench%20fault Wrench systems] || 1, 3, 11

| 1, 3, 11

|-

|-

| Rifts and detached normal fault systems

| [[Rift]]s and [[detached normal fault]] systems || 2, 8, 10, 12, 15

| 2, 8, 10, 12, 15

|-

|-

| Diapiric

| [[Diapir]]ic || 2, 12

| 2, 12

|-

|-

| Foreland block folds

| [[Foreland block fold]]s || 3, 6, 8

| 3, 6, 8

|-

|-

| Basement warps and sags

| [[Basement]] warps and sags || 2, 6, 8, 11

| 2, 6, 8, 11

|}

|}

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Exploring for structural traps]]

[[Category:Exploring for structural traps]]