Description File for Field Structure and Trap Code

Field Structure Code (FSTRU)

Field Primary Trap Code (FTRAP1)

Field Secondary Trap Code (FTRAP2)

A

Anticline

A

Anticlines

A

Anticlines

B

Fault

B

Faulted Anticline

B

Faulted Anticline

C

Shallow Salt Diapir: 0 - 4,000'SS

C

Rollover anticline into growth fault

C

Rollover anticline into growth fault

D

Intermediate Salt Diapir: 4,000 - 10,000'SS

D

Normal Fault

D

Normal Fault

E

Deep Salt Dome: > 10,000'SS

E

Reverse Fault

E

Reverse Fault

F

Salt Ridge

F

Turtle Structure

F

Turtle Structure

G

Shale Diapir

G

Flank traps associated with salt or shale diapirs

G

Flank traps associated with salt or shale diapirs

H

Unconformity

H

Sediments overlying domes

H

Sediments overlying domes

I

Stratigraphic

I

Caprock

I

Caprock

J

Reef

J

Updip facies change

J

Updip facies change

K

Rollover into growth fault

K

Updip pinch out

K

Updip pinch out

L

Rotational Slump Block

L

Permeability

L

Permeability

M

Nonpiercement Louann Salt

M

Onlap sands

M

Onlap sands

N

Thrust Fault

N

Annular unconformity

N

Annular unconformity

U

Unknown

O

Barrier reef

O

Barrier reef

P

Patch reef

P

Patch reef

Q

Subsalt Trap

Q

Subsalt Trap

U

Unknown

U

Unknown