Post on 21-Jun-2018
Current Production Trends of the Woodford Shaleand Surface to Subsurface Correlations of Overlying
and Underlying Formation Boundaries
By: Rick AndrewsOklahoma Geological Survey
October 22, 2008
TALK OUTLINE
• Regional distribution of Woodford producing wells
• Surface to subsurface correlation of bounding strata
• Production declines (some of the better wells)
Woodford producing wells in Oklahoma as of 4-08. From IHS Energy Data.
Woodford wells in Wagoner Co. Oklahoma
T.
17
N.
R. 18 E.R. 17 E.
RESOURCES DEVELWCS INCWCT OPERATING
TD ~ 1,000 ft
5-25MMCF cum/well
Woodford producing wells in Oklahoma as of 4-08. From IHS Energy Data.
Woodford wells in Carter Co. Oklahoma
CIMAREXONEAL andCHESAPEAKE
Perf ~4,000 ftMostly older (vert) wellsBoth oil and gas
Woodford producing wells in Oklahoma as of 4-08. From IHS Energy Data.
TEXAS
OKLAHOMA
Woodford wells in Marshall Co. Oklahoma
T.6S.
T.5S.
R. 5 E.R. 4 E. R. 6 E. R. 7 E.
Cimarex & Range ProdOlder wells (vertical)Some poor-producing
horizontal wellsPerf ~4,000 ft T.
7S.
Woodford producing wells in Oklahoma as of 4-08. From IHS Energy Data.
Woodford wells in Oklahoma – Main Deep TrendAtoka Co.
Pittsburg Co.
Hughes Co.
Coal Co.
McIntosh Co.
ChesapeakeContinental
Newfield
DevonSt Mary
Antero
Okfuskee Co.
NewfieldDevon
Pablo
XTO
PetroquestAntero
Metro
TALK OUTLINE
• Regional distribution of Woodford producing wells
• Surface to subsurface correlation of bounding strata
• Production declines (some of the better wells)
Caney
Sycamore
TXO #1 Smith, SW SW 31, T2S-R2E
~ 1 ¼ miles
6300
6200
6100
6000
5900
Woo
dfor
dS
ycam
ore
0 400 800 CPS
Feet
0
100
200
300
400
GR Den-Neu Resistivity
Chert
Syc
Vio
Woodford – Sycamore Strata S/of Arbuckles
West side I-35SE/4 sec. 25, T2S-R1E
Woodford
West side I-35SE/4 sec. 25, T2S-R1E
Syc
amor
eW
oodf
ord
TXO #1 AE Smith, SW SW 31, T2S-R2E
6200
Woo
dfor
dS
ycam
ore
GR- API Den-Neu Resistivity
Fay’s (1989) top
1 10 10030 20 10 0
Chert and siliceous shale with P nodules grading down into mostly shale
~ 1 ¼ miles
Traditional top
Gre
enis
h-gr
ay s
hale
w
ith li
gniti
c cl
ay
surface GR
Woodford – Sycamore Contact; So of Arbuckles
Chert
6300
Sycamore limestones
Woodford Shale
Greenish-gray, earthy shale below Sycamore carbonates and above Woodford Shale fo
rmati
on co
ntac
t
Cherty Woodford Shale
Greenish-gray shale below Sycamore carbonates and above Woodford cherty beds
form
atio
n co
ntac
t
SE NW NE 30
T 1S R2ESW NE NE 30
T 1S R2E
Placid Oil Company No. 1 JoyceC NE SW 20, T1S-R2E<1 mi
Traditional formation- boundary log picks
Woo
dfor
d Sh
ale
HuntonLs
SycamoreLs
GR Den-Neu Por Resistivity
Surface GR
covered
Hunton/Woodford/Sycamore Strata N/of of Arbuckles
east side of I-35
east SH-77D& W/of I-35
1 10 10030 20 10 0
SW NE NE 30T1S-R2E
East side of I-35
Placid Oil Company No. 1 JoyceC NE SW 20, T1S-R2E<1 mi
0
20
ft
60
40
80
100
30 20 10 0
Cherty w/Pnods
Mostly chert
Shaly
Cherty
limestone
Woodford
Shale
SycamoreLs
Woodford – Sycamore Contact N/of Arbuckles
Outcrop contact
VeryCherty
limestone
Chert?
Shaly
Surface GR
Shaly?
GR Den-Neu Por Resistivity
Low resist shale
Shale
Shaly
Shaly
1 10 100
SE NW NE 30
T 1S R2ESW NE NE 30
T 1S R2E
Placid Oil Company No. 1 JoyceC NE SW 20, T1S-R2E<1 mi
Traditional formation- boundary log picks
Woo
dfor
d Sh
ale
HuntonLs
SycamoreLs
GR Den-Neu Por Resistivity
Surface GR
covered
Hunton/Woodford/Sycamore Strata N/of of Arbuckles
east side of I-35
east SH-77D& W/of I-35
1 10 10030 20 10 0
SE NW NE 30T 1S R2E
Placid Oil Company No. 1 JoyceC NE SW 20, T1S-R2E
GR Den-Neu Por Resistivity
<1 mi
Woo
dfor
d Sh
ale
HuntonLs
east SH-77D & W/of I-35
Woodford
Shale
HuntonLs
30 20 10 0 1 10 100
Surface GR
Surface GR
Outcroptop
Gravel lag & shBlack & green earthy shale
Woodford – Hunton Contact N/of Arbuckles
Woodford Shale
Unconformity
conglomerate
Transgressive shale
Note: these beds are overturned
Hunton – lower part (Henryhouse? Fm)
Hunton contact
Up-section
Woodford ShaleTransgressive shale
Hunton contact
Unconformity conglomerate
Up-sectionNote: these beds are overturned
Unconformity conglomerate just above Hunton
TALK OUTLINE
• Regional distribution of Woodford producing wells
• Surface to subsurface correlation of bounding strata
• Production declines (some of the better wells)
Atoka Co.
Pittsburg Co.
Hughes Co.
McIntosh Co.Okfuskee Co.
Coal Co.
Devon 1-20H Billie JeanNW NW 20, 3N-11E
Newfield 1H-32 WilsonNW NW 32, 2N-11E
Newfield 1H-7 SpragueNE NW 7, 2N-11E
Newfield 1H-20 MelvinNE NE 20, 4N-11E
Newfield 2H-31 PattersonSE SW 31, 4N-11E
Newfield 4H-22 Sherman EllisSW SW 22, 5N-12E
Pay out??
Devon 1-20H Billie JeanNW NW 20, 3N-11E
Newfield 1H-7 SpragueNE NW 7, 2N-11E
Newfield 1H-32 WilsonNW NW 32, 2N-11E
Newfield 1H-20 MelvinNE NE 20, 4N-11E
Newfield 2H-31 PattersonSE SW 31, 4N-11E
Newfield 4H-22 Sherman EllisSW SW 22, 5N-12E
Atoka Co.
Pittsburg Co.
Hughes Co.
McIntosh Co.Okfuskee Co.
Coal Co.
71% decline in 3 m
o
48% decline in 14 mo
Devon 1-20H Billie JeanNW NW 20, 3N-11E
Newfield 1H-7 SpragueNE NW 7, 2N-11E
Newfield 1H-32 WilsonNW NW 32, 2N-11E
Newfield 1H-20 MelvinNE NE 20, 4N-11E
Newfield 2H-31 PattersonSE SW 31, 4N-11E
Newfield 4H-22 Sherman EllisSW SW 22, 5N-12E Atoka Co.
Pittsburg Co.
Hughes Co.
McIntosh Co.Okfuskee Co.
Coal Co.
24% decline in 15 mo
Devon 1-20H Billie JeanNW NW 20, 3N-11E
Newfield 1H-7 SpragueNE NW 7, 2N-11E
Newfield 1H-32 WilsonNW NW 32, 2N-11E
Newfield 1H-20 MelvinNE NE 20, 4N-11E
Newfield 2H-31 PattersonSE SW 31, 4N-11E
Newfield 4H-22 Sherman EllisSW SW 22, 5N-12E
Atoka Co.
Pittsburg Co.
Hughes Co.
McIntosh Co.Okfuskee Co.
Coal Co.
79% decline in 15 mo
Devon 1-20H Billie JeanNW NW 20, 3N-11E
Newfield 1H-7 SpragueNE NW 7, 2N-11E
Newfield 1H-32 WilsonNW NW 32, 2N-11E
Newfield 1H-20 MelvinNE NE 20, 4N-11E
Newfield 2H-31 PattersonSE SW 31, 4N-11E
Newfield 4H-22 Sherman EllisSW SW 22, 5N-12E
Atoka Co.
Pittsburg Co.
Hughes Co.
McIntosh Co.Okfuskee Co.
Coal Co.
Pay-out?69% decline in 15 mo
Devon 1-20H Billie JeanNW NW 20, 3N-11E
Newfield 1H-7 SpragueNE NW 7, 2N-11E
Newfield 1H-32 WilsonNW NW 32, 2N-11E
Newfield 1H-20 MelvinNE NE 20, 4N-11E
Newfield 2H-31 PattersonSE SW 31, 4N-11E
Newfield 4H-22 Sherman EllisSW SW 22, 5N-12E
Atoka Co.
Pittsburg Co.
Hughes Co.
McIntosh Co.Okfuskee Co.
Coal Co.
Pay-out?
67% decline in 11 mo
14
13
12
11
10
9
8
7
6
5
14
13
12
11
10
9
8
7
6
5
NYMEX Henry- Hub natural Gas Prices - 12 previous months$
per
M
MB
tu
Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
2007 2008
$ p
er
MM
Btu
Unfriendly price for shale gas!