The Oriskany sandstone formation has been a prolific producer of natural gas in the Appalachian basin since 1930s. Lot of production wells have been converted to gas storage wells for the ease of operation. Natural gas storage industry is a vital part of North American energy driven economy because of the fluctuation in seasonal demand and in maintaining the reliability of supply needed to meet the demands of the consumer. However, the storage wells suffer from an annual deliverability loss of 5% owing to the various damage mechanisms. A lot of work pertaining to the issue of identification of damage mechanisms and subsequent development of stimulation technology in order to mitigate the damage and restore the wells deliverability have been done in a joint effort between The Gas Research Institute, Department of Energy, American Gas Association and the various other operator companies involved in the storage industry. Operators mostly rely on traditional methods such as blowing, washing, reperforating, acidizing, infill drilling to restore wells deliverability. These traditional methods do provide short term benefits, but the longevity is not sustained and the overall situation remains same. Hydraulic fracturing is not preferred in terms of legitimate concerns over excessive vertical height growth, long fracture fluid cleanup times, lack of expertise and cost. This research study was carried out to understand the various damage mechanisms affecting the Oriskany wells, with a focus on gas storage wells. We then developed a dataset of reservoir properties, rock properties and fracture treatment data for Oriskany based on a complete literature review and calculations from a sonic log. Parametrical studies were carried out to investigate the effect of type of fracture fluids, injection rate, types of proppant, treatment volume, reservoir pressure and treatment schedule on fracture geometries in the Oriskany formation. Based on the results, we developed new stimulation methods that lead to increased well deliverability, fracture height containment, and higher average fracture conductivity. This new understanding and knowledge help in practicing engineers design better treatments in stimulating Oriskany wells.

References

References
1.
Bennion
,
D. B.
,
Thomas
,
F. B.
,
Imer
,
D.
, and
Ma
,
T.
,
2000
, “
Detailed Protocol for the Screening and Selection of Gas Storage Reservoirs
,”
SPE
/CERI Gas Technology Symposium,
Calgary, AB, Canada
,
Apr. 3–5
, Paper No. 59738-MS10.2118/59738-MS.
2.
Germer
,
J. W.
, and
Barker
,
K. M.
,
2010
, “
Formation Damage in Gas-Storage Wells
,”
SPE
International Symposium and Exhibition on Formation Damage Control,
Lafayette, LA
,
Feb. 10–12
, Paper No. 127696-MS.10.2118/127696-MS
3.
Reeves
,
S. R.
,
1998
, “
Fracture-Stimulation Technology for Gas-Storage Wells
,”
J. Pet. Technol.
,
50
(
2
), pp.
61
67
.10.2118/39417-MS
4.
Frantz
,
J. H.
, Jr.
, and
Brown
,
K. G.
,
2002
, “
Characterization of Conditions of Natural Gas Storage Reservoirs and Design and Demonstration of Remedial Techniques for Damage Mechanism Found Therein
,”
Pittsburgh, PA
, Annual Technical Progress Report No. DE-FG26-99FT40703.
5.
Yeager
,
V. J.
, and
Shuchart
,
C. E.
,
1997
, “
Acidizing Gas Storage Wells
,”
SPE
Eastern Regional Meeting,
Lexington, KY
,
Oct. 22–24
, Paper No. 39225-MS.10.2118/39225-MS
6.
Wright
,
L.
, and
Kepley
,
J.
,
1967
, “
Bactericide Application in an Oriskany Storage Pool
,”
SPE
Indiana Regional Meeting,
Evansville, IN
,
Sept. 21–22
, Paper No. 1980-MS10.2118/1980-MS.
7.
McLeod
,
H. O.
, and
Coulter
,
A. W.
,
1966
, “
The Use of Alcohol in Gas Well Stimulation
,”
SPE
Eastern Regional Meeting,
Columbus, OH
,
Nov. 10–11
, Paper No. 1663-MS.10.2118/1663-MS
8.
Wang
,
J. Y.
,
2012
, “
Well Completion for Effective Deliquification of Natural Gas Wells
,”
ASME J. Energy Resour. Technol.
,
134
(
1
), p.
013102
10.1115/1.4005284
9.
Henderson
,
F. D.
,
1991
, “
Producing the Oriskany in Southwestern Pennsylvania
,”
SPE
Eastern Regional Meeting,
Lexington, KY
,
Oct. 22–25
, Paper No. 23430-MS.10.2118/23430-MS
10.
Gu
,
H.
, and
Siebrits
,
E.
,
2006
, “
Effect of Formation Modulus Contrast on Hydraulic Fracture Height Containment
,” International Oil & Gas Conference and Exhibition in China,
Beijing, China
,
Dec. 5–7
,
SPE
, Paper No. 103822-MS.10.2118/103822-MS
11.
Simonson
,
E. R.
,
Abou-Sayed
,
A. S.
, and
Clifton
,
R. J.
,
1978
, “
Containment of Massive Hydraulic Fractures
,”
SPE J.
,
18
(
1
), pp.
27
32
10.2118/6089-PA.
12.
Van Eekelen
,
H. A. M.
,
1982
, “
Hydraulic Fracture Geometry: Fracture Containment in Layered Formations
,”
SPE J.
,
22
(
3
), pp.
341
349
.10.2118/9261-PA
13.
Daneshy
,
A. A.
,
2009
, “
Factors Controlling the Vertical Growth of Hydraulic Fractures
,”
SPE
Hydraulic Fracturing Technology Conference,
The Woodlands, TX
,
Jan. 19–21
, Paper No. 118789-MS.10.2118/118789-MS
14.
Tushar
,
V.
,
2011
, “
Fracture Height Containment in the Stimulation of Oriskany Formation
,” M.Sc. thesis,
The Pennsylvania State University
,
University Park, PA
.
15.
Teufel
,
L. W.
, and
Clark
,
J. A.
,
1984
, “
Hydraulic Fracture Propagation in Layered Rock: Experimental Studies of Fracture Containment
,”
SPE J.
,
24
(
1
), pp.
19
32
.10.2118/9878-PA
16.
Palmer
,
I. D.
, and
Luiskutty
,
C. T.
,
1986
, “
Comparison of Hydraulic Fracture Models for Highly Elongated Fractures of Variable Height
,”
ASME J. Energy Resour. Technol.
,
108
(
2
), pp.
107
115
.10.1115/1.3231249
17.
Mendelsohn
,
D. A.
,
1984
, “
A Review of Hydraulic Fracture Modeling—Part I: General Concepts, 2D Models, Motivation for 3D Modeling
,”
ASME J. Energy Resour. Technol.
,
106
(
3
), pp.
369
376
.10.1115/1.3231067
18.
Mendelsohn
,
D. A.
,
1984
, “
A Review of Hydraulic Fracture Modeling—II: 3D Modeling and Vertical Growth in Layered Rock
,”
ASME J. Energy Resour. Technol.
,
106
(
4
), pp.
543
553
.10.1115/1.3231121
19.
Carbo Ceramics,
2007
, FracproPT version 2007.
20.
Shlyapobersky
,
J.
, and
Chudnovsky
,
A.
,
1994
, “
Review of Recent Developments in Fracture Mechanics With Petroleum Engineering Applications
,” Rock Mechanics in Petroleum Engineering,
Delft, The Netherlands
,
Aug. 29–31
,
SPE
, Paper No. 28074-MS.10.2118/28074-MS
21.
Chudnovsky
,
A.
,
Fan
,
J.
,
Shulkin
,
Y.
,
Dudley
,
J. W.
, II
,
Shlyapobersky
,
J.
, and
Schraufnagel
,
R.
,
1996
, “
A New Hydraulic Fracture Tip Mechanism in a Statistically Homogeneous Medium
,”
SPE
Annual Technical Conference and Exhibition,
Denver, CO
,
Oct. 6–9
, Paper No. 36442-MS.10.2118/36442-MS
22.
Rubin
,
M. B.
,
1983
, “
Experimental Study of Hydraulic Fracturing in an Impermeable Material
,”
ASME J. Energy Resour. Technol.
,
105
(2), pp.
116
124
.10.1115/1.3230889
23.
Valko
,
P.
, and
Economides
,
M. J.
,
1993
, “
Applications of a Continuum Damage Mechanics Model to Hydraulic Fracturing
,” Low Permeability Reservoirs Symposium,
Denver, CO
,
Apr. 26–28
,
SPE
, Paper No. 25887-MS.10.2118/25887-MS
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