silt

silt

silt

silt

coalysd-slt

coalysd-clay

sand-gravel

coalscoals

clay

clay

ss

sh

lignite

gravel

abdtlignite

slts

slts

ss-slts

ss-slts

wood

lignite

gravel

sand

sand

sand

abdtcoals

coaly ss

clay-ss

sandymudst

sltymudst

slts

tuff

tuff

clay-sand

?

progradational deltaic, nearshore marine, & incised valley fill

sh, tuff

sand-gravel

sh, sd

NE-prograding

delta front (upper) &

inner shelf (lower)

delta plain & fluvial

U S NAVYUmiat Test 1KB = 738 ft

Spud 6/22/1945

TD = 6005 ft

15 miles 15 miles

U S NAVYSentinel Hill Core 1

KB = 209 ftSpud 1/26/1947

Shivugak Bluff Measured Section

highly generalized fromFlores and others (2007a)

TD = 1180 ft

11.0 miles

ARCOTulaga 1

KB = 180 ftSpud 2/7/1993

TD = 11742 ft

16.5 miles

BPKuparuk Uplands Ekvik 1

KB = 619 ftSpud 2/21/1989

TD = 6100 ft

10.9 miles

TEXACOWolfbutton 32-7-8

KB = 494 ftSpud 1/15/1989

TD = 9550 ft

13.6 miles

CONOCOPHILLIPS ALASKACirque 3KB = 28 ft

Spud 1/19/2002

TD = 6677 ft

10.6 miles

CONOCOPHILLIPS ALASKARavik St 1KB = 351 ft

Spud 1/25/1983

CONOCOPHILLIPS ALASKAKRU Tabasco 2T-210

KB = 117 ftSpud 11/18/1999

ARCOWest Sak River St 1

KB = 84 ftSpud 1/20/1971

BPMilne Pt Unit KR A-01

KB = 42 ftSpud 2/5/1980

TD = 8200 ft

TD =5340 ft

TD =10290 ft TD =10180 ft

16.5 miles

-40 200MV

Depth

TVD0.2 400OHMM

0

1000

2000

3000

4000

5000

6000

-90 90MV

0 150API

Depth

TVDDeep Resistivity

0.2 2000OHMM

150 50US/F0

1000

2000

4000

5000

6000

7000

8000

-90 90MV

0 150API

Depth

0.2 2000OHMM

150 50US/FT0

1000

2000

3000

4000

5000

6000

-90 90MV

0 150GAPI

Depth

0.2 2000OHMM

150 50USFT0

1000

2000

3000

4000

5000

6000

7000

8000

0 100API

Depth

0.2 2000OHMM

150 50US/FT0

1000

2000

3000

5000

6000

-90 90MV

0 150API

Depth

0.2 2000OHMM

150 50US/FT

100200300400500600700800900

10001100

0

1000

2000

3000

4000

5000

6000

7000

8000

0 150API

Depth

0.2 2000OHMM

0

1000

2000

3000

4000

5000

-90 90MV

0 150API

Depth

0.2 2000OHMM

150 50US/FT0

1000

2000

3000

4000

5000

6000

7000

8000

-90 90MV

0 150API

Depth

0.2 2000OHMM

150 50US/FT0

1000

2000

3000

4000

5000

6000

7000

8000

500 500

0 0

-500 -500

-1000 -1000

-1500 -1500

-2000 -2000

-2500 -2500

-3000 -3000

-3500 -3500

-4000 -4000

-4500 -4500

-5000 -5000

-5500 -5500

-6000 -6000

-6500 -6500

-7000 -7000

-7500 -7500

See continuous core description and interpretation of Flores and others (2007b)

A A'

Sea LevelSea Level

No logs run

Deep ResistivityTVD

TVDDeep Resistivity

Deep ResistivityTVD

TVDDeep Resistivity

Deep Resistivity Deep ResistivityDeep Resistivity

Sonic Transit TimeSonic Transit Time

Sonic Transit Time

Sonic Transit Time

Sonic Transit Time

Sonic Transit Time

Sonic Transit Time

Spontaneous Potential

Spontaneous Potential

Spontaneous Potential

Spontaneous Potential

Spontaneous PotentialSpontaneous Potential

Gamma RayGamma Ray

Gamma RayGamma RayGamma Ray

Gamma Ray

Gamma Ray

Gamma Ray

TVD TVD TVD

Spontaneous Potential Short Normal Resistivity

fluvial - floodplain - mire facies:

conglomeratic ss, sltst, mudst, coal

barrier-shoreface - delta-front facies:

ss, bentonitic mudst

channelized fluvial

erosion surface,

>75’ relief

100’ 0’

200’300’

sb? MCU

sb? MCU

sb MCU?

sb

sb

sb MCU

Seabee Fm

Tuluvak Fm Fm

Seabee Fm

Seabee Fm

Seabee Fm

Tuluvak Fm

lower Schrader Bluff FmPrince Creek Fm

lower Schrader Bluff Fm

lower

Schrader Bluff Fm

lower Schrader Bluff Fm

lower Schrader Bluff Fm

Torok Fm

Torok Fm

thin coals

Prince Creek Fm Prince Creek Fm

HRZ & pebble sh

LCU

LCU

Tuluvak Fmfsfs

fs

fs fs

fs

fs

Nanushuk Fm

Torok Fm

Bs Permfrst Bs Permfrst

Bs Permfrst

Bs PermfrstBs PermfrstBs Permfrst? Bs Permfrst

MCU? (shelf)

MCU (slope?)

HRZ & pebble sh

distal Seabee Fm & Hue Sh, undiff.

Hue Sh

Alpine

Nuiqsut

Nechelik

Lower Kuparuk Fm

Upper Kuparuk Fm

Lower Kuparuk Fm

W Sak sands

W Sak sands eq

Ugnu sands eq?

Ugnu sands eq

W Sak Ss eq

W Sak Ss eq

Tabasco Ss

Ugnu sands

middle Schrader Bluff Fm middle Schrader Bluff Fm middle

Schrader Bluff Fm

proximal lower Canning Fm(or middle Schrader Bluff Fm?)

middle Schrader Bluff Fm

Sagavanirktok Fm

Sagavanirktok Fm

Prince Creek Fm

Prince Creek Fm

Prince Creek Fm

upper Schrader Bluff Fm

upper Schrader Bluff Fm

upper Schrader Bluff Fm

upper Schrader Bluff Fm

Lower Canning Fm

Sagavanirktok Fm?

Sagavanirktok Fm

LCU

LCU

Kingak Fm

Kingak Fm

MCU(slope-basin?)

MCU (basin?)

HRZ &pebble sh

fs

numerous coals above 715’

nonmarine

marine

marine

lignitic sd

Schrader Bluff (marine)

Schrader Bluff (marine)

Prince Creek (non-marine)

Prince Creek (non-marine)

thin coals

coaly sd, clay

ss, slts, clay, coaly

ss: glauc & chlor present (marine)

carb sd

tuffs

Inocer

slts, md gry

lignitic sd

varicol,oxidized sd

minor yel-brn siderite

marinedeltaic

marine

cement shoe

marine

marine

marine shoreface (forced regressive)

Miluveach Fm

Miluveach Fm

cement shoe

additional log data not plotted additional log data not plotted

additional log data not plotted,linework below is diagrammatic

Sheet 1. Brookian Sequence Stratigraphic Correlation Section, Umiat Field to Milne Point Field, West-central North Slope, Alaska

O unit

N unit

M unit

K & L units

nonmarine, undifferentiated

shallow marine to proximal shelf sandstone

distal shelf sandstone & siltstone

toe-of-slope turbidites (sand-prone)

shelf to slope mudstone & siltstone

condensed or bentonitic shale(either basinal or shelfal setting)

transgressive flooding/ravinement surface(curled arrow indicates probable minor transgressive erosion)

sequence boundary/erosional surface

mid-Campanian? unconformity

fs

fs

fs

sb

MCU

fs

fs

fs

Nanushuk Fm

Nanushuk Fm

Seabee Fm

Seabee Fm

Torok Fm

Shale Wall facies (sensu Houseknecht and Schenk, 2005)

Tuluvak Fm

fs

fs

fs

fs

fs

fs

fs

Tarn/Bermuda interval(off-axis & distal facies)

REVISED 02-2007P.L. Decker, Petroleum Geologist

GR suppressedin cased hole log interval

sb slumping & erosion near shelf edge

(Maastrichtian)

(Campanian)

Prince Creek Fm

early Maastrichtian

early Campanian

late Campanian

.

.

..

.

.

.

..

.

contact uncertain

contact uncertain

contact uncertain

Prince Creek -- Sagavanirktok contact uncertain in subsurface

slope wasting, other submarine erosional styles

(Cenomanian-Turonian)

additional log data not plotted,linework below is diagrammatic

Explanation

Cross section datum is mean sea level

A’

ANorth Slope Areawide Sale

Foothills Areawide Sale

Umiat 1

Sentinel HillCore Test 1

Tulaga 1

Ekvik 1

Cirque 3Ravik 1

W Sak 1

MPU KR A-01

KRU 2T-2101

Wolfbutton 32-7-8

ShivugakBluff

Trans

Alaska

Pipeline

System

NPRA

ANWR

1002Area

Beaufort Sea

Cann

ing

Rive

r

Colvil leRi ver

Beaufort Sea

Areawide Sale

OCS

25 miles

Inferred depositional setting and/or lithology

Shale Wall facies (sensu Houseknecht and Schenk, 2005)

basinal equivalent to Shale Wall facies

(sensu Houseknecht and Schenk, 2005)

Preliminary Interpretive Report 2007-2 N

AL AS K A

GEOLOGIC A L A ND G E OP HY S I

C A

LS U

RVEYS