spe 106531 case study (updated jan 21, 2008) · 2010-02-22 · microsoft powerpoint - spe 106531...
TRANSCRIPT
1
Buffalo Wallow Field Study
For: Oklahoma Geological Survey
Stephen Ingram, HalliburtonBrian Rothkopf, Forest Oil Company
Issac Paterniti, Halliburton
Overview
• Reservoir Overview• Field Wide Study Results • The Fracture Fluid System• Core Tests & Results• Case Studies
– Lease Acreage #1 (15 Wells)– Lease Acreage #2 (16 Wells)– Lease Acreage #3 (14 Wells)
2
Granite Wash Reservoir
Granite Wash Reservoir
• Wash Types:– Morrowan (Historically, Primary Play)
• Cherty– Atokan
• Chert to Carbonate– Lower & Middle Cherokee
• Typically Carbonate– Red Fork
• Commonly carbonate w/ Granatic Materials (local)
3
Granite Wash Reservoir• Highly Lenticular• Variable Permeability• Variable Porosity• Variable Water Saturation• Variable Rw
• Difficult OH environment for extensive log sweeps
• Porosity Thickness (φH) is not directly related to Permiablity Thickness (kH)
Drilling ExplosionWheeler, Hemphill & Roberts Counties
4
Statistical Analysis of Treatments
Production Trends vs. Fracture Variable101 Wells
Buffalo Wallow Field
Initial Production
30 Day Cum’s
60 Day Cum’s
90 Day Cum’s
180 Day Cum’s
Net Pay
Gross Pay
Fracture Rate
Fracture Volume
Proppant Type & Mass
See SPE 104546 for more details
Buffalo Wallow Field Development2006 - Present
Designed Sand lbs per Well, 101 Wells
0
100000
200000
300000
400000
500000
600000
700000
800000
900000
12/14/05 3/24/06 7/2/06 10/10/06 1/18/07 4/28/07 8/6/07 11/14/07 2/22/08
Designed Water bbls per Well, 101 Wells
0200000400000600000800000
100000012000001400000160000018000002000000
12/14/05 3/24/06 7/2/06 10/10/06 1/18/07 4/28/07 8/6/07 11/14/07 2/22/08
5
Buffalo Wallow Field Development2006 - Present
Lbs/Net Pay per Well, 92 Wells
0
500
1000
1500
2000
2500
3000
12/14/05 3/24/06 7/2/06 10/10/06 1/18/07 4/28/07 8/6/07 11/14/07 2/22/08
Galllons/Net Pay per Well, 92 Wells
0
1000
2000
3000
4000
5000
6000
12/14/05 3/24/06 7/2/06 10/10/06 1/18/07 4/28/07 8/6/07 11/14/07 2/22/08
A Water Frac is a Water Frac is a Water FracRIGHT?
Conventional Fluid Systems
1. Conventional Friction Reducer
2. Conventional Surfactant
3. Clay Control (typically KCL)4. Biocide
Adaptive Fluid Systems
1. Anionic Friction Reducer2. Deflocculant / Viscosity
Reducing Agent3. Microemulsion Surfactant4. Surface Modification Agent on
Sand
5. Clay Control (typically KCL)6. Biocide
6
Core Testing
• 23 Standard Sidewall Cores• Previously Tested by 3rd Party for Initial
Permeability
No. of Tests
Regained Permeability, %
Baseline 3 68
ME 8 82CS 9 73
With DE 6 87Without DE 2 68
With SMA 7 67Without SMA 10 84
*Tests only performed with new anionic friction reducer.
SMA comparison
Table 1—Regained Permeability Testing for Lower Permeability Granite Wash Side-Wall Core Samples
Surfactant comparison
Deflocculant comparison*
7
Case Study
• 3 Lease Ranch Areas within the Buffalo Wallow Field
• Lease Acreage #1 (15 Wells)• Lease Acreage #2 (16 Wells)• Lease Acreage #3 (11 Wells)
• All wells have 4 fracture treaments• All treatments targeted 80 bpm, only wells with a
standard variation less then 2% are included in this study.
Lease Acreage #1
Average Production Decline Lease Acreage #1 (15 Wells)
0
500
1000
1500
2000
2500
3000
3500
4000
0 50 100 150 200 250 300 350
8
Lease Acreage #1
Sand Volume per WellLease Acreage 1
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007
Fluid Volume per WellLease Acreage 1
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
2,000,000
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007
# of Perfs per WellLease Acreage 1
100
110
120
130
140
150
160
170
180
190
200
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007
Net Pay Per WellLease Acreage 1
0
100
200
300
400
500
600
700
800
900
1,000
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007
Lease Acreage #1
Lease Acreage #1
100
1,000
10,000
IP 30 60 90 120 150 180 210 240 270 300 330
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11Well #12Well #13Well #14Well #15Series16
Lease Acreage #1
100
1,000
10,000
0 100 200 300 400 500 600 700 800 900
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11Well #12Well #13Well #14Well #15Series16
9
Lease Acreage #1Lease Acreage #1
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
IP 30 60 90 120 150 180 210 240 270 300 330
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11Well #12Well #13Well #14Well #15
Lease Acreage #2
Average Production DeclineLease Acreage #2 (16 Wells)
0
500
1000
1500
2000
2500
3000
0 50 100 150 200 250 300 350
Days since completion
Ave
rage
Gas
Rat
e (m
scf/d
)
10
Lease Acreage #2Sand Volume per Well
Lease Acreage #2
300,000
350,000
400,000
450,000
500,000
550,000
600,000
650,000
700,000
750,000
9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007 8/6/2007
Fluid Volume per WellLease Acreage #2
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1,400,000
1,500,000
1,600,000
9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007 8/6/2007
Net Pay per wellLease Acreage #2
300
350
400
450
500
550
600
650
700
750
800
9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007 8/6/2007
# of Perforations per WellLeaase Acreage #2
100
110
120
130
140
150
160
170
180
190
200
9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007 4/28/2007 8/6/2007
Lease Acreage #2Lease Acreage #2
100
1,000
10,000
IP 30 60 90 120 150 180 210 240 270 300 330
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11Well #12Well #13Well #14Well #15Well #16
Lease Acreage #2
100
1,000
10,000
0 100 200 300 400 500 600 700 800 900 1000
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11Well #12Well #13Well #14Well #15Well #16
11
Lease Acreage #2Lease Acreage #2
0
50,000
100,000
150,000
200,000
250,000
300,000
IP 30 60 90 120 150 180 210 240 270 300 330
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11Well #12Well #13Well #14Well #15Well #16
Lease Acreage #3
Average Production Decline Lease Acerage 3 (14 Wells)
0
500
1000
1500
2000
2500
0 50 100 150 200 250 300 350
Days since completion
Prod
uctio
n G
as R
ate
(Msc
f/d)
12
Lease Acreage #3Sand Volume per Well
Lease Acreage #3
300,000
350,000
400,000
450,000
500,000
550,000
600,000
650,000
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007
Water Volume per Well Lease Acreage #3
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1,400,000
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007
Net Pay per Well Lease Acreage #3
300
350
400
450
500
550
600
650
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007
# of Perforations per Well Lease Acreage #3
150
155
160
165
170
175
180
185
190
5/28/2005 9/5/2005 12/14/2005 3/24/2006 7/2/2006 10/10/2006 1/18/2007
Lease Acreage #3Lease Acreage #3
100
1000
10000
0 100 200 300 400 500 600 700 800
Well #1Well #2Well #3Well #4Well #5
Well #6Well #7Well #8Well #9Well #10Well #11
Lease Acreage #3
100
1000
10000
IP 30 60 90 120 150 180 210 240 270 300 330
Well #1Well #2
Well #3Well #4Well #5Well #6
Well #7Well #8Well #9
Well #10Well #11
13
Lease Acreage #3Lease Acreage #3
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
IP 30 60 90 120 150 180 210 240 270 300 330
Well #1Well #2Well #3Well #4Well #5Well #6Well #7Well #8Well #9Well #10Well #11
Results and Conclusions
• Maintain Consistency with Fracturing Variables in order to make informed decisions
• Sub fields within the Buffalo Wallow have dramatically varying production mechanisms and rates
• Increased volume of sand per foot of net pay indicates slight production benefit
• Increased volume of fluid per foot of net pay indicates slight production benefit
• Increased # of perforations indicate slight production benefit
14
Thank You
The Authors would like to thank the management of
Forest Oil Corporation And
Halliburton Energy Services