American Oil and Gas Reporter - June 2012 - 37

TECHCONNECTIONS
Surfactants And CO2/Gel System Promise More Oil Recovery
Liquids continue to be the moneymaker in oil and gas. Oil prices were down a little in May, but still were at very profitable levels. Interest in enhanced oil recovery remains high, but the oil patch is moving cautiously, especially smaller operators. Last month I provided some ideas for near-term EOR technologies. This column explores some new EOR technologies in or near exploratory field testing. All have received U.S. Department of Energy funding and are managed by the National Energy Technology Laboratory. The University of Oklahoma has focused on Pennsylvanian age sands to test high performance, next generation surfactants for improved chemical flooding. Over the years, chemical floods have reduced surfactant concentrations while maintaining recovery, but chemical costs are still significant. OU has tested sacrificial agents to minimize surfactant adsorption at the brine/rock interface, further reducing required surfactant injection. The project is ending, but the field tests are compelling. Partnering with Mid-Con Energy of Tulsa, OU initiated two single-well tests in the Bartlesville formation in 2011. The investigators first characterized the remaining oil in place in the high-water-cut stripper wells using tracer tests. They flooded the wells with three surfactants with polymer, using reservoir brine rather than freshwater, then chased the chemical flood with additional brine. Post-flood, they re-measured the remaining oil to assess the effectiveness of the floods. In one well, the flood mobilized 75 percent of the residual oil with a surfactant concentration of 0.5 percent. The performance in the other well was even better, with 80 percent residual oil mobilization using a surfactant concentration of only 0.23 percent. Subsequent laboratory tests indicated surfactant concentrations as low as 0.11 percent could be used to mobilize oil. With these results in hand, two commercial pilot projects are being designed for implementation this fall in Northeast Oklahoma. OU estimates that if the Bartlesville formation is treated widely with polymer surfactant floods, up to 1 billion barrels more oil might be produced. The OU project contact is Jeff Harwell (jharwell@ou.edu). The Illinois State Geological Survey, along with Rex Energy Corporation of Bridgeport, Il., is investigating applying alkali surfactant polymer (ASP) EOR floods in Illinois’ Lawrence Field (see story page 83). The ISGS estimates 130 million barrels of oil are still in the Lawrence’s Cypress and Bridgeport sandstone reservoirs (13 percent of original oil in place). ISGS is doing all the reservoir characterization for this project. Rex Energy is supporting the laboratory flood tests, and is executing pilot floods in Lawrence County, Il. Rex has increased production in one well from 16 barrels a day to 65-75 bbl/d using ASP flooding, and increased the overall oil cut from 1 percent to 12 percent. Based on these results, Rex Energy is increasing the size of its pilot from 15 to 58 acres, and then plans to invest in ASP flooding on 351 acres immediately south of its current operations in 2013, according DOE. Contact John Grube (grube@isgs.uiuc.edu) at ISGS for more information.

“Liquids continue to be the moneymaker
and interest in enhanced oil recovery remains high.

”

The search for conformance control agents for carbon dioxide oil recovery floods has been on for years. Carbon dioxide’s high mobility creates high permeability fingers that bypass much of typical reservoirs. Impact Technologies LLC of Tulsa and Clean Tech Innovations LLC have teamed to test Impact Technologies’ Silica Polymer Initiator (SPI) CO2 gel systems. The novelty in this approach is that CO2 initiates the gel formation, so only those channels with carbon dioxide in them are blocked. An SPI mix slug becomes one of the water injections in a water-alternating-gas flood, and the CO2 following that slug will finger through and mix with the more viscous SPI slug. As one finger gets blocked, the CO2 moves off to another finger, which will be blocked again, and so on. The flood front thereby becomes more stable, and the CO2 mobilizes more oil by reducing the reservoir volume bypassed by the carbon dioxide. The investigators also are testing substituting a superabsorbent polymer instead of the more commonly used polyacrylamide to improve gel integrity. Impact Technologies’ Ken Oglesby (kdo2@impact2u.com) is encouraged by the laboratory studies in sand packs. The project is moving ahead with field tests this summer. An oilman himself, Oglesby has used SPI gels already in other applications such as waterflooding with success. His formulation for CO2 gels is designed with field application in mind (easy mixing and better isolation in the high permeability zones). This project is scheduled to run to 2014. A lot of prior work has gone into developing gels for the primary CO2 injection phase, but none are low cost or commercial. Oglesby hopes to change that with his SPI technology. These next tests will be critical in the path to success. Ì

BILL LAWSON is the executive director of the Petroleum Technology Transfer Council. He was the first director of DOE’s Strategic Center for Natural Gas and Oil at the National Energy Technology Center, retiring after 31 years of DOE service. PTTC may be contacted at www.pttc.org.
JUNE 2012 37


http://www.pttc.org

Table of Contents for the Digital Edition of American Oil and Gas Reporter - June 2012

American Oil and Gas Reporter - June 2012
Contents
Reports
Calendar
Oil & Gas Counts
State Legislative
Industry Digest
Natural Gas NSPS Affects a Variety of Equipment
Federal Legislation
SPCC
EPA
Keystone XL
Tech Connections
Washington Watch
Anadarko Finds World-Class Reservoirs in Deepwater Mozambique
Variety of Projects Have Permian Basin Hopping
Infrastructure Bottlenecks Easing in Permian Region
Completion Design Optimizes Yeso-San Andres Oil Wells
Cover Story
Beaver Creek CO2 Flood Boosts Madison Production
Study Evaluates Low-Salinity Waterfloods
Variable Speed Drives Coming of Age
Activity Spurring Artificial Lift Innovations
Project Shows STMZ’s Viability for Lower Tertiary Completions
ICDs, Modeling Improve Horizontal Shelf Well Completion
Intelligent Gas Lift Maximizes Production, Recovery
KOGA
CIPA
TOGA
TAEP
Frac Rules
Marcellus Regs
Conventions
The American Well Servicing Directory, Summer 2012
Industry Focus
Classified Advertising
Advertisers Index
American Oil and Gas Reporter - June 2012 - American Oil and Gas Reporter - June 2012
American Oil and Gas Reporter - June 2012 - Cover2
American Oil and Gas Reporter - June 2012 - Contents
American Oil and Gas Reporter - June 2012 - Reports
American Oil and Gas Reporter - June 2012 - 5
American Oil and Gas Reporter - June 2012 - 6
American Oil and Gas Reporter - June 2012 - 7
American Oil and Gas Reporter - June 2012 - Calendar
American Oil and Gas Reporter - June 2012 - 9
American Oil and Gas Reporter - June 2012 - 10
American Oil and Gas Reporter - June 2012 - 11
American Oil and Gas Reporter - June 2012 - 12
American Oil and Gas Reporter - June 2012 - 13
American Oil and Gas Reporter - June 2012 - Oil & Gas Counts
American Oil and Gas Reporter - June 2012 - 15
American Oil and Gas Reporter - June 2012 - Industry Digest
American Oil and Gas Reporter - June 2012 - 17
American Oil and Gas Reporter - June 2012 - 18
American Oil and Gas Reporter - June 2012 - 19
American Oil and Gas Reporter - June 2012 - 20
American Oil and Gas Reporter - June 2012 - 21
American Oil and Gas Reporter - June 2012 - 22
American Oil and Gas Reporter - June 2012 - 23
American Oil and Gas Reporter - June 2012 - Natural Gas NSPS Affects a Variety of Equipment
American Oil and Gas Reporter - June 2012 - 25
American Oil and Gas Reporter - June 2012 - 26
American Oil and Gas Reporter - June 2012 - 27
American Oil and Gas Reporter - June 2012 - Federal Legislation
American Oil and Gas Reporter - June 2012 - 29
American Oil and Gas Reporter - June 2012 - 30
American Oil and Gas Reporter - June 2012 - 31
American Oil and Gas Reporter - June 2012 - SPCC
American Oil and Gas Reporter - June 2012 - 33
American Oil and Gas Reporter - June 2012 - Keystone XL
American Oil and Gas Reporter - June 2012 - 35
American Oil and Gas Reporter - June 2012 - 36
American Oil and Gas Reporter - June 2012 - Tech Connections
American Oil and Gas Reporter - June 2012 - 38
American Oil and Gas Reporter - June 2012 - Washington Watch
American Oil and Gas Reporter - June 2012 - Anadarko Finds World-Class Reservoirs in Deepwater Mozambique
American Oil and Gas Reporter - June 2012 - 41
American Oil and Gas Reporter - June 2012 - 42
American Oil and Gas Reporter - June 2012 - 43
American Oil and Gas Reporter - June 2012 - 44
American Oil and Gas Reporter - June 2012 - 45
American Oil and Gas Reporter - June 2012 - 46
American Oil and Gas Reporter - June 2012 - 47
American Oil and Gas Reporter - June 2012 - 48
American Oil and Gas Reporter - June 2012 - 49
American Oil and Gas Reporter - June 2012 - Variety of Projects Have Permian Basin Hopping
American Oil and Gas Reporter - June 2012 - 51
American Oil and Gas Reporter - June 2012 - 52
American Oil and Gas Reporter - June 2012 - 53
American Oil and Gas Reporter - June 2012 - 54
American Oil and Gas Reporter - June 2012 - 55
American Oil and Gas Reporter - June 2012 - 56
American Oil and Gas Reporter - June 2012 - 57
American Oil and Gas Reporter - June 2012 - 58
American Oil and Gas Reporter - June 2012 - 59
American Oil and Gas Reporter - June 2012 - 60
American Oil and Gas Reporter - June 2012 - 61
American Oil and Gas Reporter - June 2012 - 62
American Oil and Gas Reporter - June 2012 - 63
American Oil and Gas Reporter - June 2012 - Infrastructure Bottlenecks Easing in Permian Region
American Oil and Gas Reporter - June 2012 - 65
American Oil and Gas Reporter - June 2012 - 66
American Oil and Gas Reporter - June 2012 - 67
American Oil and Gas Reporter - June 2012 - 68
American Oil and Gas Reporter - June 2012 - 69
American Oil and Gas Reporter - June 2012 - 70
American Oil and Gas Reporter - June 2012 - 71
American Oil and Gas Reporter - June 2012 - Completion Design Optimizes Yeso-San Andres Oil Wells
American Oil and Gas Reporter - June 2012 - 73
American Oil and Gas Reporter - June 2012 - 74
American Oil and Gas Reporter - June 2012 - 75
American Oil and Gas Reporter - June 2012 - 76
American Oil and Gas Reporter - June 2012 - 77
American Oil and Gas Reporter - June 2012 - 78
American Oil and Gas Reporter - June 2012 - 79
American Oil and Gas Reporter - June 2012 - 80
American Oil and Gas Reporter - June 2012 - 81
American Oil and Gas Reporter - June 2012 - Cover Story
American Oil and Gas Reporter - June 2012 - 83
American Oil and Gas Reporter - June 2012 - 84
American Oil and Gas Reporter - June 2012 - 85
American Oil and Gas Reporter - June 2012 - 86
American Oil and Gas Reporter - June 2012 - 87
American Oil and Gas Reporter - June 2012 - 88
American Oil and Gas Reporter - June 2012 - 89
American Oil and Gas Reporter - June 2012 - 90
American Oil and Gas Reporter - June 2012 - 91
American Oil and Gas Reporter - June 2012 - Beaver Creek CO2 Flood Boosts Madison Production
American Oil and Gas Reporter - June 2012 - 93
American Oil and Gas Reporter - June 2012 - 94
American Oil and Gas Reporter - June 2012 - 95
American Oil and Gas Reporter - June 2012 - 96
American Oil and Gas Reporter - June 2012 - 97
American Oil and Gas Reporter - June 2012 - 98
American Oil and Gas Reporter - June 2012 - 99
American Oil and Gas Reporter - June 2012 - Study Evaluates Low-Salinity Waterfloods
American Oil and Gas Reporter - June 2012 - 101
American Oil and Gas Reporter - June 2012 - 102
American Oil and Gas Reporter - June 2012 - 103
American Oil and Gas Reporter - June 2012 - Variable Speed Drives Coming of Age
American Oil and Gas Reporter - June 2012 - 105
American Oil and Gas Reporter - June 2012 - 106
American Oil and Gas Reporter - June 2012 - 107
American Oil and Gas Reporter - June 2012 - Activity Spurring Artificial Lift Innovations
American Oil and Gas Reporter - June 2012 - 109
American Oil and Gas Reporter - June 2012 - 110
American Oil and Gas Reporter - June 2012 - 111
American Oil and Gas Reporter - June 2012 - 112
American Oil and Gas Reporter - June 2012 - 113
American Oil and Gas Reporter - June 2012 - 114
American Oil and Gas Reporter - June 2012 - 115
American Oil and Gas Reporter - June 2012 - 116
American Oil and Gas Reporter - June 2012 - 117
American Oil and Gas Reporter - June 2012 - Project Shows STMZ’s Viability for Lower Tertiary Completions
American Oil and Gas Reporter - June 2012 - 119
American Oil and Gas Reporter - June 2012 - 120
American Oil and Gas Reporter - June 2012 - 121
American Oil and Gas Reporter - June 2012 - 122
American Oil and Gas Reporter - June 2012 - 123
American Oil and Gas Reporter - June 2012 - 124
American Oil and Gas Reporter - June 2012 - 125
American Oil and Gas Reporter - June 2012 - 126
American Oil and Gas Reporter - June 2012 - 127
American Oil and Gas Reporter - June 2012 - 128
American Oil and Gas Reporter - June 2012 - 129
American Oil and Gas Reporter - June 2012 - 130
American Oil and Gas Reporter - June 2012 - ICDs, Modeling Improve Horizontal Shelf Well Completion
American Oil and Gas Reporter - June 2012 - 132
American Oil and Gas Reporter - June 2012 - 133
American Oil and Gas Reporter - June 2012 - 134
American Oil and Gas Reporter - June 2012 - 135
American Oil and Gas Reporter - June 2012 - 136
American Oil and Gas Reporter - June 2012 - 137
American Oil and Gas Reporter - June 2012 - 138
American Oil and Gas Reporter - June 2012 - 139
American Oil and Gas Reporter - June 2012 - 140
American Oil and Gas Reporter - June 2012 - Intelligent Gas Lift Maximizes Production, Recovery
American Oil and Gas Reporter - June 2012 - 142
American Oil and Gas Reporter - June 2012 - 143
American Oil and Gas Reporter - June 2012 - 144
American Oil and Gas Reporter - June 2012 - 145
American Oil and Gas Reporter - June 2012 - 146
American Oil and Gas Reporter - June 2012 - 147
American Oil and Gas Reporter - June 2012 - 148
American Oil and Gas Reporter - June 2012 - KOGA
American Oil and Gas Reporter - June 2012 - 150
American Oil and Gas Reporter - June 2012 - 151
American Oil and Gas Reporter - June 2012 - CIPA
American Oil and Gas Reporter - June 2012 - 153
American Oil and Gas Reporter - June 2012 - 154
American Oil and Gas Reporter - June 2012 - 155
American Oil and Gas Reporter - June 2012 - TOGA
American Oil and Gas Reporter - June 2012 - 157
American Oil and Gas Reporter - June 2012 - 158
American Oil and Gas Reporter - June 2012 - 159
American Oil and Gas Reporter - June 2012 - 160
American Oil and Gas Reporter - June 2012 - 161
American Oil and Gas Reporter - June 2012 - 162
American Oil and Gas Reporter - June 2012 - 163
American Oil and Gas Reporter - June 2012 - TAEP
American Oil and Gas Reporter - June 2012 - 165
American Oil and Gas Reporter - June 2012 - 166
American Oil and Gas Reporter - June 2012 - 167
American Oil and Gas Reporter - June 2012 - 168
American Oil and Gas Reporter - June 2012 - 169
American Oil and Gas Reporter - June 2012 - 170
American Oil and Gas Reporter - June 2012 - Frac Rules
American Oil and Gas Reporter - June 2012 - Marcellus Regs
American Oil and Gas Reporter - June 2012 - 173
American Oil and Gas Reporter - June 2012 - Conventions
American Oil and Gas Reporter - June 2012 - The American Well Servicing Directory, Summer 2012
American Oil and Gas Reporter - June 2012 - 176
American Oil and Gas Reporter - June 2012 - 177
American Oil and Gas Reporter - June 2012 - 178
American Oil and Gas Reporter - June 2012 - 179
American Oil and Gas Reporter - June 2012 - 180
American Oil and Gas Reporter - June 2012 - 181
American Oil and Gas Reporter - June 2012 - 182
American Oil and Gas Reporter - June 2012 - 183
American Oil and Gas Reporter - June 2012 - 184
American Oil and Gas Reporter - June 2012 - 185
American Oil and Gas Reporter - June 2012 - 186
American Oil and Gas Reporter - June 2012 - 187
American Oil and Gas Reporter - June 2012 - 188
American Oil and Gas Reporter - June 2012 - 189
American Oil and Gas Reporter - June 2012 - 190
American Oil and Gas Reporter - June 2012 - 191
American Oil and Gas Reporter - June 2012 - 192
American Oil and Gas Reporter - June 2012 - 193
American Oil and Gas Reporter - June 2012 - 194
American Oil and Gas Reporter - June 2012 - 195
American Oil and Gas Reporter - June 2012 - 196
American Oil and Gas Reporter - June 2012 - 197
American Oil and Gas Reporter - June 2012 - 198
American Oil and Gas Reporter - June 2012 - 199
American Oil and Gas Reporter - June 2012 - 200
American Oil and Gas Reporter - June 2012 - 201
American Oil and Gas Reporter - June 2012 - 202
American Oil and Gas Reporter - June 2012 - Industry Focus
American Oil and Gas Reporter - June 2012 - 204
American Oil and Gas Reporter - June 2012 - 205
American Oil and Gas Reporter - June 2012 - 206
American Oil and Gas Reporter - June 2012 - 207
American Oil and Gas Reporter - June 2012 - 208
American Oil and Gas Reporter - June 2012 - Classified Advertising
American Oil and Gas Reporter - June 2012 - Advertisers Index
American Oil and Gas Reporter - June 2012 - Cover3
American Oil and Gas Reporter - June 2012 - Cover4
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