Carroll Springs Project: A 12, Acre Rodessa (Gloyd) Coquina Limestone Oil Reservoir Well Evaluation Model Nodal Analysis of Typical Existing Completions vs. Improved Vertical and Short Lateral Wells
A fractured vertical well similar to those drilled 2 years ago, can be duplicated today at a cost of $1.7 million and a payout of 28 months. A horizontal well with multi-stage frac will cost approximately $3.7 million; and payout in 4 to 8 months depending on frac proppant compaction.
Coquina Prospect A Vertical and Horizontal Well Exploitation/Development Plan for the Coquina (Rodessa) Formation, in Henderson County, Texas Computer Simulation - Existing fractured vertical well performance is correlated to actual initial production rate and average initial monthly production rates. Simulation of 1 and 3 horizontal wells in the same Coquina (Rodessa) formation with multi-stage fracturing is demonstrated. Horizontal wells have approximately nine (9) times higher initial production rates Increased drainage areas are 125% for 1 HZ wells, and 165% for 3 HZ wells. This increases the EUR 125% (1 HZ) and 165% (3 HZ) over the equivalent vertical well in the Coquina (Rodessa). All example well simulations used the actual vertical well experience of initial average barrels of oil per day for the first month equal to 35% of the initial test rate (IP). Similar declines were created in HZ well simulations to match the drainage areas and corresponding EUR s.
Actual Carroll Springs Well FLOWING BTM PRES (psig) 5 4 3 2 1 Inflow/Outflow Plot Vertical completion with Frac Fluid Properties : Oil Gr = 42. API Gas Gr =.75 Water Gr = 1.6 WLR = 1. % GOR = 14. scf/bbl Pbp = 5267.8 psig Wellbore Data : WHP = 1. psig TVD = 9994. ft Corr =Olgas Tbg/2.375/ 998 Csg/4.5/185 Reservoir Data : Pr = 44. psig BHT = 262. deg F Perm = 1.25 md Re = 216.4 ft Bit Size= 7.75 in Hnorm = 6.4 ft Hmeas = 6.4 ft Segregated Flow Kw/Ko =.25 Kh/Kv = 1. Type = Hydrl Frac Cinco Model Xf = 4. ft Frac Wid= 24. in Kfrac = 2. md Porosity =.13 CARROLL CREEK AREA TYPICAL WELL MODEL AS CATFISH CREEK #1 WITH FRAC 5 TO 1 LBS FOR 4 TO 8 FT FRAC LENGTH 5 1 FLOW RATE (bbl/d) 15 IP = 155 BBLS/D 2 Base case data: 1.25 md, 8 ft section, (6.4 net) poro = 13% InflowPres = 44 InflowPres = 35 InflowPres = 25 InflowPres = 15 OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. Results of frac with 5, lb sand for 4 ft ½ length (wing length)
Actual Carroll Springs Well Radetsky (vert) - Tejas 1, Present Cuml = 131, bbls EUR = 3, bbls Economic Limit: 3/295 Economic Life: 996 mo Future Net Revenue: $1,673,456 Present Worth: $2,911,849 Rate of Return: >1 % Return on Invest:. Payout Date: n/a Daily Rate 1 1 Oil at Effective Date: 439 bbl Oil at Economic Limit: 15 bbl Rem Oil (Decline): 169,891 bbl Ult Oil (Decline): 34,883 bbl Oil Decline at Eff Date: 2.13 % Cum Oil at Eff Date: 134,992 bbl Gas at Effective Date: mcf Gas at Economic Limit: mcf Rem Gas (Decline): mcf Ult Gas (Decline): 265,336 mcf Gas Decline at Eff Date:. % Cum Gas at Eff Date: 265,336 mcf 1 1992 1996 2 24 28 212 216 22 224 228 232 Time Results of frac with 5, lb sand for 4 ft ½ length (wing length) Water at Effective Date: 48 bbl Water at Economic Limit: 1 bbl Rem Water (Decline): 19,514 bbl Ult Water (Decline): 34,56 bbl
Expected Results, New Vertical Well Carroll Springs ETL 1 vert - Tejas Carroll Springs ETL 1 vert - Tejas Daily Rate 1, 1 1 CapEx = $1.7mm 6 = Avg BOPD EUR = 3, Bbls First month flow rate = 35% of IP, initial prod rate. Decline curve mimics the Radetsky #1 Economic Limit: 8/297 Economic Life: 125 mo Future Net Revenue: $6,377,688 Present Worth: $1,675,86 Rate of Return: 34.57 % Return on Invest: 4.87 Payout Date: 1/214 Oil at Effective Date: bbl Oil at Economic Limit: 166 bbl Rem Oil (Decline): 3,525 bbl Ult Oil (Decline): 35,25 bbl Oil Decline at Eff Date:. % Cum Oil at Eff Date: 4,5 bbl Gas at Effective Date: mcf Gas at Economic Limit: mcf Rem Gas (Decline): 13,8 mcf Ult Gas (Decline): 16,68 mcf Gas Decline at Eff Date:. % Cum Gas at Eff Date: 3,6 mcf 1 211 213 215 217 219 221 223 225 227 229 231 Time Water at Effective Date: bbl Water at Economic Limit: 32 bbl Rem Water (Decline): 1,294 bbl Ult Water (Decline): 1,794 bbl $9 oil, $3.25 gas, 77% NRI. 7/212 start date, 28 mo. payout.
FLOWING BTM PRES (psig) Carroll Springs Well, Large Frac 5 4 3 2 1 Inflow/Outflow Plot Vertical completion with large Frac Fluid Properties : Oil Gr = 42. API Gas Gr =.75 Water Gr = 1.6 WLR = 1. % GOR = 1. scf/bbl Pbp = 3819.3 psig Wellbore Data : WHP = 1. psig TVD = 9994. ft Corr =Olgas Tbg/2.375/ 998 Csg/4.5/185 Reservoir Data : Pr = 46. psig BHT = 239.9 deg F Perm = 1.25 md Re = 216.4 ft Bit Size= 7.75 in Hnorm = 6.4 ft Hmeas = 6.4 ft Segregated Flow Kw/Ko =.25 Kh/Kv = 1. Type = Hydrl Frac Cinco Model Xf = 8. ft Frac Wid= 24. in Kfrac = 2. md Porosity =.13 CARROLL SPRINGS CATFISH RANCH #1 DATA VERTICAL WELL FRAC 1 LBS FOR 8 FT FRAC 1/2 LENGTH(WING) 5 1 15 FLOW RATE (bbl/d) InflowPres = 46 InflowPres = 35 InflowPres = 25 InflowPres = 15 OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. 2 Results of frac with 1, lb sand for 8 ft ½ length (wing length) 25 IP = 28 BBLS/D 3 Base case data: 1.25 md, 8 ft section, (6.4 net) poro = 13%
Expected Results, New Vertical Well, LF Carroll Springs ETL 2 vert - Tejas Carroll Springs ETL 1 vert - Tejas Daily Rate 1, 1 1 CapEx = $1.8mm Avg BOPD= 95 BOPD EUR = 3, Bbls First month flow rate = 35% of IP, initial prod rate. Larger frac, higher decline rate Economic Limit: 11/274 Economic Life: 752 mo Future Net Revenue: $8,946,795 Present Worth: $3,864,576 Rate of Return: 8.177 % Return on Invest: 6.11 Payout Date: 8/213 Oil at Effective Date: bbl Oil at Economic Limit: 167 bbl Rem Oil (Decline): 296,825 bbl Ult Oil (Decline): 31,325 bbl Oil Decline at Eff Date:. % Cum Oil at Eff Date: 4,5 bbl Gas at Effective Date: mcf Gas at Economic Limit: mcf Rem Gas (Decline): 174,6 mcf Ult Gas (Decline): 177,66 mcf Gas Decline at Eff Date:. % Cum Gas at Eff Date: 3,6 mcf 1 211 213 215 217 219 221 223 225 227 229 231 Time Water at Effective Date: bbl Water at Economic Limit: 57 bbl Rem Water (Decline): 11,414 bbl Ult Water (Decline): 11,914 bbl $9 oil, $3.25 gas, 77% NRI. 7/212 start date, 14 mo. payout.
Porosity feet = 8 Porosity feet = 8 Area= 288 acres Area= 361 acres I.P. in Hz Well 9 times greater Drainage area.25 x greater Therefore a short HZ well gains NPV advantage over vertical wells Scale: 1 = 1
FLOWING BTM PRES (psig) Carroll Springs HZ Well, 5 Stage Frac 5 4 3 2 1 1 Hz Well Completion with Frac 2 Darcy Perm Frac Proppant 4 PSI Pwh Inflow/Outflow Plot 7 casing, 3 ½ tubing For high flow rates Fluid Properties : Oil Gr = 42. API Gas Gr =.75 Water Gr = 1.6 WLR = 1. % GOR = 14. scf/bbl Pbp = 5267.8 psig Wellbore Data : WHP = 1. psig TVD = 9995.7 ft Corr =Olgas Tbg/3.5/124 Csg/7./11275 Reservoir Data : Pr = 44. psig BHT = 262. deg F Perm = 1. md Lx = 5. ft Ly = 4. ft Gas Cap =NO Bit Size= 8.75 in Hnorm = 6.4 ft Xw = 25. ft Yw = 2. ft Zw = 3.2 ft Segregated Flow Kw/Ko =.25 Kh/Kv = 1. Kx/Ky = 1. Type = Hydrl Frac Cinco Model Xf = 4. ft Frac Wid= 12. in Kfrac = 2. md Porosity =.12 GOODE Pres Drop =NO HzWell Len= 1. ft Shot Den = 6. spf Perf Dia =.48 in Gun Phasing = 9 deg Perf Len = 38. in Kc/Kf =.3 5 1 FLOW RATE (bbl/d) InflowPres = 44 InflowPres = 35 InflowPres = 25 InflowPres = 15 OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. 15 IP = 155 BBLS/D 2 12% porosity, 1md permeability Perforating 5 2 intervals Fracture Stimulating each With 5, lbs 1 FT Hz WELL WITH 5-5, LB SAND FRAC STAGES FOR 4 ½ LENGTH (WING) FRACTURES, 1% OF HZ PERF D
Expected Results, 1 HZ well, ETL 1H 5 stg 1 frac 5 - Tejas Carroll Springs ETL 1H 5 - Tejas Daily Rate 1, 1 1 CapEx = $3.7mm EUR = 375, Bbls First month flow rate = 35% of WEM nodal analysis initial prod. Rate (IP). IP = 9 times greater than vert well, and EUR is 25% greater than vert well based on increased drainage area. Economic Limit: 7/229 Economic Life: 28 mo Future Net Revenue: $19,64,68 Present Worth: $14,111,37 Rate of Return: >1 % Return on Invest: 6.3 Payout Date: 11/212 Oil at Effective Date: bbl Oil at Economic Limit: 157 bbl Rem Oil (Decline): 345,194 bbl Ult Oil (Decline): 375,194 bbl Oil Decline at Eff Date:. % Cum Oil at Eff Date: 3, bbl Gas at Effective Date: mcf Gas at Economic Limit: mcf Rem Gas (Decline): 395,12 mcf Ult Gas (Decline): 419,12 mcf Gas Decline at Eff Date:. % Cum Gas at Eff Date: 24, mcf 1 211 213 215 217 219 221 223 225 227 229 231 Time Water at Effective Date: bbl Water at Economic Limit: 87 bbl Rem Water (Decline): 34,152 bbl Ult Water (Decline): 34,352 bbl $9 oil, $3.25 gas, 77% NRI. 7/212 start date, 5 mo. payout.
FLOWING BTM PRES (psig) Carroll Springs HZ Well, 15 Stage Frac 5 4 3 2 1 1 2 3 FLOW RATE Inflow/Outflow Plot 3 Hz Well Completion with 15 Stage Frac 2 Darcy Perm Frac Proppant (bbl/d) 7 casing, 3 ½ tubing for high flow rates 4 5 IP = 43 BBLS/D InflowXf = 1. InflowXf = 2. InflowXf = 4. OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. 6 Fluid Properties : Oil Gr = 42. API Gas Gr =.65 Water Gr = 1.6 WLR = 12. % GOR = 14. scf/bbl Pbp = 5728. psig Wellbore Data : WHP = 2. psig TVD = 9274. ft Corr =Olgas Tbg/3.5/1274 Csg/4.5/13274 Csg/./1529 Reservoir Data : Pr = 4627.2 psig BHT = 239.9 deg F Perm = 1. md Lx = 72. ft Ly = 42. ft Gas Cap =NO Bit Size= 6.125 in Hnorm = 6.4 ft Xw = 36. ft Yw = 21. ft Zw = 3.2 ft Fractional Flow kro =. krw =.25 Kh/Kv = 1. Kx/Ky = 1. Type = Hydrl Frac Cinco Model Xf = 4. ft Frac Wid= 12. in Kfrac = 2. md Porosity =.12 GOODE Pres Drop =NO HzWell Len= 3. ft Shot Den = 6. spf Perf Dia =.48 in Gun Phasing = 9 deg Perf Len = 38. in Kc/Kf =.3 12% porosity, 1md permeability Perforating 15 2 intervals Fracture Stimulating each With 5, lbs 3 FT Hz WELL WITH 15-5, LB SAND FRAC STAGES FOR 4 ½ LENGTH (WING) FRACTURES, 1% PERF S
Carroll Springs HZ Well, 15 Stage Frac FLOWING BTM PRES (psig) 5 4 3 2 1 5 1 15 FLOW RATE Inflow/Outflow Plot 3 Hz Well Completion with 15 Stage Frac 1 md Perm Frac Proppant 2 (bbl/d) 7 casing, 3 ½ tubing For high flow rates 25 3 IP = 25 BBLS/D InflowXf = 4. InflowXf = 2. InflowXf = 1. OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. 35 Fluid Properties : Oil Gr = 42. API Gas Gr =.65 Water Gr = 1.6 WLR = 12. % GOR = 14. scf/bbl Pbp = 5728. psig Wellbore Data : WHP = 2. psig TVD = 9274. ft Corr =Olgas Tbg/3.5/1274 Csg/4.5/13274 Csg/./1529 Reservoir Data : Pr = 4627.2 psig BHT = 239.9 deg F Perm = 1. md Lx = 72. ft Ly = 42. ft Gas Cap =NO Bit Size= 6.125 in Hnorm = 6.4 ft Xw = 36. ft Yw = 21. ft Zw = 3.2 ft Fractional Flow kro =. krw =.25 Kh/Kv = 1. Kx/Ky = 1. Type = Hydrl Frac Cinco Model Xf = 4. ft Frac Wid= 12. in Kfrac = 1. md Porosity =.12 GOODE Pres Drop =NO HzWell Len= 3. ft Shot Den = 6. spf Perf Dia =.48 in Gun Phasing = 9 deg Perf Len = 38. in Kc/Kf =.3 12% porosity, 1md permeability Perforating 15 2 intervals Fracture Stimulating each With 5, lbs 3 FT Hz WELL WITH 15-5, LB SAND FRAC STAGES FOR 4 ½ LENGTH (WING) FRACTURES, 1% of HZ PERF D
Expected Results, 3 HZ well, 15 stg frac 1, 1, ETL 1H 3 15 - Tejas Carroll Springs ETL 1H 3 15 - Tejas CapEx = $4.7mm EUR = 457, Bbls Economic Limit: 5/222 Economic Life: 122 mo Future Net Revenue: $16,453,13 Present Worth: $13,252,521 Rate of Return: >1 % Return on Invest: 4.16 Payout Date: 11/212 Daily Rate 1 1 Oil at Effective Date: bbl Oil at Economic Limit: 199 bbl Rem Oil (Decline): 427,972 bbl Ult Oil (Decline): 457,972 bbl Oil Decline at Eff Date:. % Cum Oil at Eff Date: 3, bbl Gas at Effective Date: mcf Gas at Economic Limit: mcf Rem Gas (Decline): 53,937 mcf Ult Gas (Decline): 554,937 mcf Gas Decline at Eff Date:. % Cum Gas at Eff Date: 24, mcf Water at Effective Date: bbl Water at Economic Limit: 55 bbl Rem Water (Decline): 186,942 bbl Ult Water (Decline): 187,142 bbl Water Decline at Eff Date:. % Cum Water at Eff Date: 2 bbl Inj at Effective Date: bbl Inj at Economic Limit: bbl Rem Inj (Decline): bbl Ult Inj (Decline): bbl Inj Decline at Eff Date:. % Cum Inj at Eff Date: bbl 1 211 213 215 217 219 221 223 225 227 229 231 Time $9 oil, $3.25 gas, 77% NRI. 7/212 start date, 5 mo. payout.
Carroll Springs HZ Well, 15 Stage Frac FLOWING BTM PRES (psig) 5 4 3 2 1 3 Hz Well Completion with 15 Stage Frac 5 2 PSI Pwh FLOW RATE Inflow/Outflow Plot 1 md Perm Frac Proppant (bbl/d) 7 casing, 3 ½ tubing For high flow rates 1 IP = 12 BBLS/D InflowXf = 4. InflowXf = 2. InflowXf = 1. OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. 15 Fluid Properties : Oil Gr = 42. API Gas Gr =.65 Water Gr = 1.6 WLR = 12. % GOR = 14. scf/bbl Pbp = 5728. psig Wellbore Data : WHP = 2. psig TVD = 9274. ft Corr =Olgas Tbg/3.5/1274 Csg/4.5/13274 Csg/./1529 Reservoir Data : Pr = 4627.2 psig BHT = 239.9 deg F Perm = 1. md Lx = 72. ft Ly = 42. ft Gas Cap =NO Bit Size= 6.125 in Hnorm = 6.4 ft Xw = 36. ft Yw = 21. ft Zw = 3.2 ft Fractional Flow kro =. krw =.25 Kh/Kv = 1. Kx/Ky = 1. Type = Hydrl Frac Cinco Model Xf = 4. ft Frac Wid= 12. in Kfrac = 1. md Porosity =.12 GOODE Pres Drop =NO HzWell Len= 3. ft Shot Den = 6. spf Perf Dia =.48 in Gun Phasing = 9 deg Perf Len = 38. in Kc/Kf =.3 12% porosity, 1md permeability Perforating 15 2 intervals Fracture Stimulating each With 5, lbs 3 FT Hz WELL WITH 15-5, LB SAND FRAC STAGES FOR 4 ½ LENGTH (WING) FRACTURES, 1% of HZ PERF D
1, ETL 1H 3 15 1md loperm - Tejas CapEx = $4.7mm EUR = 457, Bbls Economic Limit: 11/244 Economic Life: 392 mo Future Net Revenue: $2,62,545 Present Worth: $12,852,626 Rate of Return: >1 % Return on Invest: 4.17 Payout Date: 4/213 Daily Rate 1 1 Oil at Effective Date: bbl Oil at Economic Limit: 77 bbl Rem Oil (Decline): 426,876 bbl Ult Oil (Decline): 456,876 bbl Oil Decline at Eff Date:. % Cum Oil at Eff Date: 3, bbl Gas at Effective Date: mcf Gas at Economic Limit: mcf Rem Gas (Decline): 448,95 mcf Ult Gas (Decline): 472,95 mcf Gas Decline at Eff Date:. % Cum Gas at Eff Date: 24, mcf 1 211 214 217 22 223 226 229 232 235 238 241 Time Water at Effective Date: bbl Water at Economic Limit: bbl Rem Water (Decline): 27,212 bbl Ult Water (Decline): 27,412 bbl $9 oil, $3.25 gas, 77% NRI. 7/212 start date, 9 mo. payout.
Weight of Proppant versus Fracture Dimensions Height of pay section 6 feet Red numbers are "input data". Frac sand weight 17 lbs per cu.ft. Fracture half length (wing length) feet----> 1 2 3 4 5 6 7 8 Ellipse Shape Fracture, Coned Width at Perfs Lbs of Proppant - for frac diameter, and frac 1/2 length Cone factor =.25 12 inches 12,69 25,219 37,828 5,437 63,46 75,656 88,265 1,874 24 inches 25,219 5,437 75,656 1,874 126,93 151,311 176,53 21,749 36 inches 37,828 75,656 113,484 151,311 189,139 226,967 264,795 32,623 48 inches 5,437 1,874 151,311 21,749 252,186 32,623 353,6 43,497 6 inches 63,46 126,93 189,139 252,186 315,232 378,278 441,325 54,371 72 inches 75,656 151,311 226,967 32,623 378,278 453,934 529,59 65,246 Rectangular Shape Frac, Coned 12 inches 16,5 32,1 48,15 64,2 8,25 96,3 112,35 128,4 Cone factor =.25 24 inches 32,1 64,2 96,3 128,4 16,5 192,6 224,7 256,8 Height of pay, feet 6 36 inches 48,15 96,3 144,45 192,6 24,75 288,9 337,5 385,2 48 inches 64,2 128,4 192,6 256,8 321, 385,2 449,4 513,6 6 inches 8,25 16,5 24,75 321, 41,25 481,5 561,75 642, 72 inches 96,3 192,6 288,9 385,2 481,5 577,8 674,1 77,4 by SCD, Oct 11, 211
FLOWING BTM PRES (psig) 5 4 3 2 1 2 4 6 FLOW RATE Inflow/Outflow Plot 1 Hz Well Completion with Frac 2 md Perm Frac Proppant (crushed) 1 PSI Pwh 2 PSI Pwh (bbl/d) 7 casing, 3 ½ tubing for high flow rates 1 InflowNo Frac = 15. InflowNo Frac = 1. InflowNo Frac = 5. OutflowPwh = 1. OutflowPwh = 2. OutflowPwh = 4. 8 4 PSI Pwh 12 Fluid Properties : Oil Gr = 42. API Gas Gr =.75 Water Gr = 1.6 WLR = 12. % GOR = 1259. scf/bbl Pbp = 464.3 psig Wellbore Data : WHP = 2. psig TVD = 9994. ft Corr =Olgas Tbg/3.5/1274 Csg/4.5/15274 Reservoir Data : Pr = 44. psig BHT = 239.9 deg F Perm = 1. md Lx = 5394. ft Ly = 4394. ft Gas Cap =NO Bit Size= 6. in Hnorm = 6.4 ft Xw = 2697. ft Yw = 2197. ft Zw = 3.2 ft Fractional Flow kro =. krw =.25 Kh/Kv = 1. Kx/Ky = 1. Type = Hydrl Frac Cinco Model Xf = 4. ft Frac Wid= 24. in Kfrac = 2. md Porosity =.12 GOODE Pres Drop =NO HzWell Len= 1. ft Shot Den = 6. spf Perf Dia =.48 in Gun Phasing = 9 deg Perf Len = 38. in Kc/Kf =.3 12% porosity, 1md permeability Perforating 2 intervals Fracture Stimulating each With 5, lbs Permeability of Proppant = 2 md (crushed) 1 FT Hz WELL WITH 5, 1, or 15-5, LB SAND FRAC STAGES FOR 4 ½ LENGTH (WING) FRACTURES