Changes

  | part    = Predicting the occurrence of oil and gas traps

  | part    = Predicting the occurrence of oil and gas traps

  | chapter = Interpreting seismic data

  | chapter = Interpreting seismic data

  | frompg  = 12-1

  | frompg  = 12-20

  | topg    = 12-29

  | topg    = 12-20

  | author  = Christopher L. Liner

  | author  = Christopher L. Liner

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch12/ch12.htm

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch12/ch12.htm

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

Whether doing 2-D or 3-D [[seismic interpretation]], the tasks are fundamentally the same. The work can sometimes be done by hand for 2-D data (paper sections and manual contouring of maps) but virtually requires computer assistance for 3-D data. The recipes described on the pages that follow apply to hand or computer work.

Whether doing 2-D or 3-D [[seismic interpretation]], the tasks are fundamentally the same. The work can sometimes be done by hand for [[Mapping with two-dimensional seismic data|2-D data]] (paper sections and manual contouring of maps) but virtually requires computer assistance for [[Three-dimensional seismic method|3-D data]]. The recipes described on the pages that follow apply to hand or computer work.

==Four basic techniques==

==Four basic techniques==

{| class = "wikitable"

{| class = "wikitable"

|-

|-

! Technique

! Technique || Description

! Description

|-

|-

| Classic

| Classic || Mapping a surface of interest (from data) using [[Average velocity|average velocities]]

| Mapping a surface of interest (from data) using average velocities

|-

|-

| Modified Classic

| Modified Classic || Mapping a surface of interest using a densely drilled shallow horizon, avoiding the weathering layer at the earth's surface

| Mapping a surface of interest using a densely drilled shallow horizon, [[avo]]iding the weathering layer at the earth's surface

|-

|-

| Migrated Depth

| Migrated Depth || Mapping an area using a 3-D seismic data cube with the vertical axis converted to depth (commonly used in complex areas but needs manual tweaking to match well control to seismic data)

| Mapping an area using a 3-D seismic data cube with the vertical axis converted to depth (commonly used in complex areas but needs manual tweaking to match well control to seismic data)

|-

|-

| Volumetric Depth Conversion

| Volumetric Depth Conversion || Mapping an area using [[Seismic migration|migrated]] seismic data (with time axis) converted to a depth cube using a ''V'' ( ''X, Y, Z'' ) velocity model

| Mapping an area using migrated seismic data (with time axis) converted to a depth cube using a ''V'' ( ''X, Y, Z'' ) velocity model

|}

|}

==See also==

==See also==

* [[Preparing seismic data for mapping]]

* [[Seismic data preparation for mapping]]

* [[Creating an integrated structure map]]

* [[Seismic data - creating an integrated structure map]]

* [[Seismic data - mapping with two-dimensional data]]

==External links==

==External links==

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

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

[[Category:Interpreting seismic data]]

[[Category:Interpreting seismic data]]