PAPG May Meeting Taylor McClain Range Resources

Introduction

Objectives

Study area and dataset

Geologic Setting

Sequence stratigraphy Present understanding

Cross-sections and interpretations

Regional maps

Petrophysics Passey TOC, density TOC

Regional TOC maps

Porosity and water saturation modeling

Hydrocarbon potential Normalized oil

Peak porosity

Initial production and percent liquids reported to date

Upper Ordovician black shale and limestone

Historic production dating to early 1900’s

Modern organic source-rock play

Vernon/Sandy Creek

Bluetail-Rooster

Albion-Scipio

Lima Indiana

Fractured interbedded play

Point Pleasant Play

Create a depositional model for the Utica-Point Pleasant interval in eastern OH and western PA.

Create stratigraphic architecture consistent between states

Correlate core data and wireline logs to calculate and map total organic carbon (TOC) and porosity.

Investigate relationship of high TOC intervals to sequence stratigraphy and basin structure

Identify prospective production fairways

Map geochemisty to determine source potential and maturity

Ohio, WV, PA, NY

300 well logs

2 measured cores

~100 wells with core TOC, Rock-eval data

Late Middle-Ordovician Paleogeography

N.E. North America situated 20-25°S latitude

Great American Carbonate Platform

Collision with island arc sets up Taconic foreland basin

Blakey, 2005, Northern Arizona Univ. Dept. of Geology; http://jan.ucc.nau.edu

Brett and Baird (2002)

Atypical foreland basin

Cross-strike lineaments create sub-basins

Sebree trough

Pennsylvania basin

Point Pleasant sub-basin

Third-order sequences

Similar between OH/KY, and NY

Cores from SW Ohio matched to logs

Correlated to study area

McLaughlin et al. (2004)

Normal faulting sets up Point Pleasant sub-basin

Organic marl deposited in sub-basin

Clean limestones on flanking platforms

N S

Point Pleasant

Lexington/Logana

Middle Utica

Lower Utica

Lexington Platform

Trenton Platform

M5

M6

C1

Organic Trenton

Upper Utica

Middle Utica

Lower Utica

N S

M5

M6

C1

C2

Brett and Baird (2002)

N S

E Canada K-b

Manheim K-b

Deer River K-b

Sherman Falls K-b

Lehman et al. (1995)

PPLN grades into Lexington platform carbonates

Utica downlaps, becomes less shale-rich

Lexington

N S

Lexington Platform

M5

M6

C1

Widespread clean carbonates

No tectonic activity

Subsidence and relative sea level increasing

Trenton Platform develops

Gentle slope

Clean LS at edge, lagoonal facies behind

Sub-basins with marl

Sharp edge at platform

Water depth differences

Subsidence, relative sea level increase

Platform retreating

Sebree trough becoming apparent

Steep edge platform, sharp facies change

Platform area significantly reduced

Black shale in the Sebree trough

Westward shift in black shale

Trenton-Utica strata are a 2nd-order transgression Utica shale marks maximum flooding surface

Four, 3rd-order sequences present (M5, M6, C1, C2)

Lowstand deposits absent, sequences separated by type 3 sequence boundaries

Amalgamation of the TS with the SB

Normal faulting along CSD’s creates steep paleo-topography, resulting in sharp facies changes

Upper Utica recognized to the north Younger than Utica shale in the south

Passey Method Porosity and resistivity respond to organic matter

Overlay logs, magnitude of separation proportional to organic content

Works best with sonic-logR, rhob-logR has two different baselines ΔLogR

0 1 2 3 4 5

LOGR - Log10(HLLD)

3

2.9

2.8

2.7

2.6

2.5

2.4

2.3

2.2

2.1

2

RH

OB

- B

ulk

Density

{F

13.4

}

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

GR

_U

TIC

A_N

RM

- GR

Utic

a N

rm L

og - c

ut fo

r Utic

a in

terv

a

6900

6950

7000

7050

7100

7150

7200

7250

7300

7350

7400

7450

7500

LOGR

(0-5)

RHOB

(3-2)

GR_UTICA_NRM

(0-200)

RHOB = 0.05359223*LOGR + 2.5384 StdErr=0.0967

WELL: 34029215930000 (1267 samples)

Utica Database - TMcClain

PETRA 12/19/2012 5:51:13 PM Plot Log10 of resistivity

Best fit line on non-organic rock (limestone)

Compute pseudo bulk density log (RhobR)

-0.2 -0.1 0 0.1 0.2 0.3 0.4

DELTRHOBR - Delta RHOBR - RHOB

0

1

2

3

4

5

6

7

8

9

10

CO

RE

_T

OC

-

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

GR

_U

TIC

A_N

RM

- GR

Utic

a N

rm L

og - c

ut fo

r Utic

a in

terv

a

CORE_TOC = 9.41689881*DELTRHOBR + 1.2086 Corr=0.819 StdErr=0.5379

91 Samples f or 5 out of 7 Wells

Utica Database - TMcClain

PETRA 3/1/2013 5:17:21 PM Calculate magnitude of separation between density and pseudo-density

Plot against TOC

Slope of line varies with LOM

0 1 2 3 4 5

LOGR - Log10(HLLD)

3

2.9

2.8

2.7

2.6

2.5

2.4

2.3

2.2

2.1

2

RH

OB

- B

ulk

Density

{F

13.4

}

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

GR

_U

TIC

A_N

RM

- GR

Utic

a N

rm L

og - c

ut fo

r Utic

a in

terv

a

6900

6950

7000

7050

7100

7150

7200

7250

7300

7350

7400

7450

7500

LOGR

(0-5)

RHOB

(3-2)

GR_UTICA_NRM

(0-200)

RHOB = 0.05359223*LOGR + 2.5384 StdErr=0.0967

WELL: 34029215930000 (1267 samples)

Utica Database - TMcClain

PETRA 12/19/2012 5:51:13 PM Plot Log10 of resistivity

Best fit line on non-organic rock (limestone)

Compute pseudo bulk density log (RhobR)

-0.2 -0.1 0 0.1 0.2 0.3 0.4

DELTRHOBR - Delta RHOBR - RHOB

0

1

2

3

4

5

6

7

8

9

10

CO

RE

_T

OC

-

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

GR

_U

TIC

A_N

RM

- GR

Utic

a N

rm L

og - c

ut fo

r Utic

a in

terv

a

CORE_TOC = 9.41689881*DELTRHOBR + 1.2086 Corr=0.819 StdErr=0.5379

91 Samples f or 5 out of 7 Wells

Utica Database - TMcClain

PETRA 3/1/2013 5:17:21 PM Calculate magnitude of separation between density and pseudo-density

Plot against TOC

Slope of line varies with LOM

Organic matter has low density

Trends strongly with bulk density log (r2=0.8)

2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3

RHOB - Bulk Density {F13.4}

0

1

2

3

4

5

6

7

8

9

10

CO

RE

_T

OC

-

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

GR

_U

TIC

A_N

RM

- GR

Utic

a N

rm L

og - c

ut fo

r Utic

a in

terv

a

CORE_TOC = (-21.34105257)*RHOB + 58.0943 Corr=-0.704 StdErr=0.8694

499 Samples f or 6 out of 6 Wells

Utica Database - TMcClain

PETRA 12/19/2012 5:11:16 PM

Both models close fit

ΔLogR model on well by well basis

Resistivity varies with LOM

Organic-rich strata focused in sub-basin

Clean carbonates on platforms

Point Pleasant sub-basin

Trenton platform

Lexington platform

Same footprint as M6, more restricted

Lines up with P-MW lineament zone

Organic-rich depocenter broadens

Highest organics to south

P-MW lineament dropping to the south

Organic-rich strata in Pennsylvania basin

Pennsylvania basin

Trenton platform

Point Pleasant TOC increases to south

Utica TOC increases to north

Core data from Fred Barth

Fit with bulk density

Very low Sw in Point Pleasant

Utica organic lean

Shallow-deep resistivity separation indicates perm

Sw Phi TOC Vclay/Vcarb

S1 - generated HC’s

S2 – Potential HC’s

S1 decreases into dry gas phase

Gaseous HC’s lost during sample recovery

S1/TOC*100

Evaluate source potential and maturity

Mix of gas and liquids needed for production

“Peak porosity” - 90th percentile value

Paleo-high

Paleo-high

Lower IP’s where Utica source

Higher IP’s where Utica seals

Thick calcareousLexington/Logana

Organic Utica Section

Thin calcareousLexington/Logana

Non-organic Utica Section

PPLN porosity increases

Density shows strong correlation with TOC and porosity ΔLogR method based on maturity

Point Pleasant contains highest TOC and porosity, lowest Sw Utica Shale contains low organic strata

TOC concentrated in Point Pleasant sub-basin

Normalized oil content mapping shows source potential and thermal maturity

Peak porosity map identifies “sweet spot” PPLN thickness increases to the north

Porosity increases to the south

Larger production rates to the south Higher PPLN porosity

Utica Shale acts as a seal?