Construction Details for FutureGen Alliance 

Permit Number: IL-137-6A-0004 (Well #4) Page G1of 5 

ATTACHMENT G: CONSTRUCTION DETAILS 

Facility Information 

Facility Name: FutureGen 2.0 Morgan County CO2 Storage Site 

IL-137-6A-0004 (Well #4) 

Facility Contacts: Kenneth Humphreys, Chief Executive Officer, 

FutureGen Industrial Alliance, Inc., Morgan County Office, 

73 Central Park Plaza East, Jacksonville, IL 62650, 217-243-8215 

Location of Injection Well: Morgan County, IL; 26−16N−9W; 39.80111oN and 90.07544oW 

Borehole and Casing and Tubing Program for the Horizontal CO2 Injection Wells 

Casing 

String

Casing 

Depth, TVD

(ft bgs)

Casing 

Depth, MD

(ft bgs)

Borehole 

Diameter

(in.)

Casing 

Outside

Diameter

(in.)

Coupling 

Outside

Diameter

(in.)

Casing Material

(weight/grade/

connection)

String 

Weight 

in Air 

(lb)

Conductor 140 140 30 24 25.198 140 lb/ft, K-55, MTC 19,600

Surface 570 570 20 16 17 84 lb/ft, K-55, BTC 47,880

Intermed. 0-3,150 3,150 14.75 10.75 11.25 51 lb/ft, K-55, BTC 160,650

Long 

String

0-3,398 0-3,400 9.5 7 7.656 29 lb/ft, N-80, BTC 98,600

3,398- 

4,030

3,400-

7,004

7 7.669 29 lb/ft, P-110, 

Premium(a)

91, 466 

Tubing 3,819.1 3,949 NA 3.5 4.5 9.3 lb/ft, N-80, EUE 36,270

(a) A corrosion-resistant alloy such as 13 Cr (13 percent chromium) having strength properties equal to or greater 

than 29-lb/ft P-110 and having premium connections will be used for this section. Perforated interval.

EUE = external upset end; TVD = total vertical depth; MD = measured depth.

Properties of Well Casing and Tubing Materials 

Casing 

String

Casing 

Material

(weight/grade/

connection)

Casing 

Outside/Inside/

Drift

Diameter (in.)

Yield 

(ksi)

Tensile

(ksi)

Internal 

(Burst) 

Yield 

(psi)

Collapse 

(psi)

Tension 

(1,000 lb)

Body (B) 

Joint (J)

Compression

(1,000 lb)

Conductor 140 lb/ft, K-55, 

MTC

24/22.938/22.751 55 95 2,130 530 (1,967) 1,139

Surface 84 lb/ft, K-55, 

BTC

16/15.010/14.823 55 95 2,980 1,410 1,326 (B)

1,499 (J)

868

Intermediate 51 lb/ft, K-55, 

BTC

10.75/9.85/9.694 55 95 4,030 2,700 801 (B)

1,042 (J)

604

Long String 29 lb/ft, N-80, 

BTC

7.0/6.184/6.059 80 110 8,100 7,020 676 (B)

746 (J)

597

29 lb/ft, P-110, 

BTC

7.0/6.184/6.059 110 125 11,220 8,530 929 (B)

955 (J)

488
Construction Details for FutureGen Alliance 

Permit Number: IL-137-6A-0004 (Well #4) Page G2of 5 

Casing 

String

Casing 

Material

(weight/grade/

connection)

Casing 

Outside/Inside/

Drift

Diameter (in.)

Yield 

(ksi)

Tensile

(ksi)

Internal 

(Burst) 

Yield 

(psi)

Collapse 

(psi)

Tension 

(1,000 lb)

Body (B) 

Joint (J)

Compression

(1,000 lb)

Tubing 9.3 lb/ft, N-80, 

EUE

3.5/2.992/2.867 80 100 10,160 10,530 207.2 (B)

207.2 (J)

207.2

MTC = metal to metal seal threaded and coupled; BTC = buttress thread coupling; ksi = kilopound per square inch
Construction Details for FutureGen Alliance 

Permit Number: IL-137-6A-0004 (Well #4) Page G3of 5 

Figure 1. Injection Well Construction Schematic (geology and depths shown in this diagram are 

based on site-specific characterization data obtained from the FutureGen 2.0 Stratigraphic Well). 
Construction Details for FutureGen Alliance 

Permit Number: IL-137-6A-0004 (Well #4) Page G4of 5 

Pre-Injection Testing Plan 

The pre-operational formation testing program will be implemented to obtain an analysis of the 

chemical and physical characteristics of the injection zone and confining zone(s) that meets the 

testing requirements of 40 CFR 146.87 and well construction requirements of 40 CFR 146.86. 

The pre-operational formation testing program will include a combination of logging, coring, 

formation hydrogeologic testing (e.g., a pump test and/or injectivity tests), and other activities 

during the drilling and construction of the CO2 injection well, monitoring well(s), and the 

FutureGen 2.0 stratigraphic well. The pre-operational testing program will determine or verify 

the depth, thickness, mineralogy, lithology, porosity, permeability, and geomechanical 

information of the Mount Simon Sandstone (CO2 injection zone), the overlying Eau Claire 

Formation (confining zone), and other relevant geologic formations. In addition, formation fluid 

characteristics will be obtained from the Mount Simon Sandstone to establish baseline data 

against which future measurements may be compared after the start of injection operations. 

The results of the testing activities will be documented in a report and submitted to the U.S. 

Environmental Protection Agency (EPA) after the well drilling and testing activities have been 

completed but before the start of CO2 injection operations. Before drilling the injection wells, a 

vertical pilot hole will be drilled through the Mount Simon Formation at the injection well 

location to collect pre-operational characterization and testing data for the injection wells. After 

completing the characterization and testing in the vertical pilot hole, the borehole will be plugged 

(cemented) from total depth to the kick-off point (approximate depth of 3,200 ft bgs) and 

converted to one of the horizontal injection wells. Additional selected pre-operational testing will 

be conducted within one or more lateral boreholes. The permittee shall submit to the Director for 

review all pre-injection testing procedures for logging, sampling and testing required by 40 CFR 

146.87 no later than 30 days prior to performing the first test, along with the schedule for such 

testing. The permittee shall submit any changes to the schedule 30 days prior to the next 

scheduled test. Testing shall not proceed without the Director's approval of the schedule.

Wireline Logging 

Open-borehole logs will be run to obtain densely spaced, in situ, structural, stratigraphic, 

physical, chemical, and geomechanical information for the Mount Simon Sandstone, the Eau 

Claire confining zone, and other key formations. Open-borehole characterization logs will be 

obtained at the surface casing point, the intermediate casing point, and at the long-string casing 

point (i.e., total borehole depth) in the vertical pilot borehole. Open-borehole wireline logs will 

not be run in the 30-in.-diameter conductor casing borehole, because logging tools are not suited 

for this large-diameter hole size. Open-borehole logs for the surface, intermediate, and longstring sections of the well will include a suite of standard logs including gamma ray, formation 

density, neutron porosity, resistivity, spontaneous potential, photoelectric factor, and caliper. In 

addition, one or more specialized logs may also be run on the long-string section of the well, 

including for example, spectral gamma,sonic, resistivity-based and/or acoustic-based image,

nuclear magnetic resonance, and elemental capture spectroscopy.
Construction Details for FutureGen Alliance 

Permit Number: IL-137-6A-0004 (Well #4) Page G5of 5 

Demonstration of Mechanical Integrity 

This table summarizes the MITs and pressure fall-off tests to be performed prior to injection: 

Class VI Rule 

Citation

Rule 

Description

Test 

Description

Program 

Period

[40 CFR 

146.89(a)(1)] MIT - Internal Annulus 

Pressure Test

Prior to 

Operation

[40 CFR 

146.87(a)(4)] MIT - External Temperature 

Log

Prior to 

Operation

[40 CFR 

146.87(e)(1)]

Testing prior to 

operating

Pressure Falloff TestPrior to 

Operation

Additional information about testing procedures is addressed in the QASP attached to the Testing and 

Monitoring Plan of this permit. A successful test will be confirmed when casing pressure holds for one 

hour with less than 3% loss or gain in pressure.