2. Block Overview
2
Block 11-2
• Location: 320km from Vung Tau
• Basin: Nam Con Son
• Operator: KNOC
• KC (75%), PVEP (25%)
• First Gas : 25th Dec., 2006
3. Production Enhancement
3
Objectives • To increase gas flow rate and recovery of RD/RDT gas field
• To make decision for additional perforation interval
• To evaluate post perforation job
Terms • January ~ September 2022
Budget • In-house
Work Scope • Petrophysical review
• GWC review
• Review previous PLT and perforation effects
• RDT water production history matching
• Forecasting the perforation effects
• Depth matching of B-3 Upper zone
• Post job evaluation for additional RDT perforation
2022 Work Program
Budget (K USD)
Firm Contingent
Production Enhancement - -
• RDT additional perforation - -
12. 2 Scenarios of Production Forecast
12
#1 : Barrier Case (Forecast)
#2 : No Barrier Case (Forecast)
Perforated
Seal
U
U
L
C
- Effective Porosity : < <
- Permeability : < <
C L
U
C L
Seal No Seal
?
No Seal
5% 7%
2%
Water
Conning
Initial
GWC
13. Producing Zone of RDT Wells
13
Well RDT-2P RDT-1P
Well Test Date November, 2021
Gas MMscfd 1.77 3.87
Producing
Zones
(PLT)
PLT
Date
Mar 2017 May 2018
Contribution
Gas
(MMscf/d)
Contribution
Gas
(MMscf/d)
A0 84% 1.49
A1 13% 0.23
A1.5 2% 0.04
A2
A3 1% 0.02 17% 0.66
B2 13% 0.50
B3 44% (2015 PLT) 3.53 (2015 PLT) 33% 1.28
C1 1% 0.04
C2 36% 1.39
RDT-1P
RDT-2P
144% 100%
A0
A0.5
A1
A1-5
A2
A3
B1
B3
C1 upper
C1 lower
C2
D1a
A 3
B 2
B 3
C 1
C 2U
C 2L
D 1b
D 3
D 4
D 5U
D 5L
Dec 2015
Mar 2017
Mar 2016
Mar 2015
Dec 2015
Mar 2015
Jun 2012
Jun 2012
Jun 2012
Jun 2012
Mar 2016
Dec 2018
Mar 2015
Mar 2016
Mar 2015
Jul 2009
May 2011
14. Production History Of RDT Wells
14
4
130
0
500
1,000
1,500
2,000
2,500
3,000
3,500
0
10
20
30
40
50
60
70
BBL/D
MMSCF/D
RDT-1P Production
Gas Condensate
2
12 0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
0
10
20
30
40
50
60
70
80
90
BBL/D
MMSCF/D
RDT-2P Production
Gas Condensate
C1+D1+D3+D4+D5 C1+C2+D1+D3+D4+D5 C1+C2UP A3+B3+C1+C2UP A3+B2+B3+C1+C2UP
B1+B3+C1+C2+D1 B1+B3 A1.5+A3+B1+B3 A0+A1+A1.5+A2+A3 A0+A1+A1.5+A2+A3+B1+B3
15. B3 Production History (RDT-2P)
15
PLT (12 Mar 2013)
52%
PLT(04 Mar 2015)
96%
PLT(01 Dec 2015)
※ (Total Production of RDT-2P) × (Contribution Ratio of B3 by PLT) = B3 Production
B3
Perforation
Push down HEX Plug
to below B3 (Dec, 2018)
A0
A0.5
A1
A1-5
A2
A3
B1
B3
C1 upper
C1 lower
C2
D1a
E1
F1
0.56 MMSCF/D
3.69 BBL/D
30.5% (=44%/144%)
PLT (07 Mar 2017)
44%
(B3/RDT-2P Ratio)
HEX Plug Set
@ above B1
(due to 1,425 bblw/d)
16. B3 Production History (RDT-1P)
16
PLT(01 Dec 2015) PLT(23 Mar 2016)
PLT(04 Mar 2017)
PLT(24 May 2018)
1.27 MMSCF/D
42 BBL/D
40% 39% 34% 32%
(B3/RDT-1P Ratio)
※ (Total Production of RDT-1P) × (Contribution Ratio of B3 by PLT) = B3 Production
B3
Perforation
A 3
B 2
B 3
C 1
C 2U
C 2L
D 1b
D 3
D 4
D 5U
D 5L
17. #1 : Barrier Case
#2 : No Barrier Case
2 Scenarios of Production Forecast
17
Perforated
Artificial barrier
B3
Simulation grid
B3
Simulation grid
Proposed perf.
B3 Up.
18. B3 Upper interval Selection
18
GWC@2869mTVDss
Proposed B3 Up
Proposed Perf. Interval
3921.03-3925.30 mMD
Dec 2015
Simulation Grid Fine Grid
19. B3 Production Recovery Review
19
RDT-1P Perforation
Zone
2021 Model
GIIP, Bcf
Top Perf.
mTVDSS/
mMD
Bottom perf.
mTVDSS/
mMD
Perf. Length,
mMD
RFDP Cumulative B3
production by
Simulation
(Bcf)
Cumulative B3
production by PLT
allocation
(Bcf)
Recovery
(%)
GWC,
mTVDss
B-3 41.46
(B3 Upper)
2837.29/
3921.03
(B3 Upper)
2839.81/
3925.30
4.27
2869 20.06 26.68 48.38 (Sim.)/ 64.35 (PLT)
(B3 Lower)
2848.02/
3939.80
(B3 Lower)
2852.56/
3947.80
8.0
23. Remaining Potential (B-3 Upper)
23
#1 : Barrier Case
B3
Artificial barrier
Simulation grid
Proposed perf.
B3 Up.
B-3 Gas Production Rate • No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Av. 29.60 bbld increased
Production Forecasting
Av. 0.85 mmscfd increased
YEAR 2022 2023 2024 2025 2026 2027 2028 Total
Gas
(bcf/yr)
0.19 0.43 0.31 0.23 0.17 0.14 0.11 1.57
Condy
(mbbl/yr)
6.84 15.31 10.60 7.92 5.51 4.36 3.34 53.88
24. Remaining Potential (B-3 Upper)
24
#2 : No Barrier Case
Simulation grid
B3
Proposed perf.
B3 Up.
B-3 Gas Production Rate • No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Av. 5.23 bbld increased
Production Forecasting
Av. 0.16 mmscfd increased
YEAR 2022 2023 2024 2025 2026 2027 2028 Total
Gas
(bcf/yr)
0.07 0.07 0.04 0.03 0.03 0.03 0.02 0.31
Condy
(mbbl/yr)
2.36 2.38 1.34 1.08 1.01 0.93 0.72 9.80
25. Simple Economics (Barrier Case)
25
• Cost
- During PLT work
- 79,689 $US (2017)
- No additional OPEX
• Pay back : 1 Month
• NCF : 7.64 $MM
B-3 Gas Production Rate • No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Av. 29.60 bbld increased
Production Forecasting
Av. 0.85 mmscfd increased
26. Simple Economics (No Barrier Case)
26
B-3 Gas Production Rate • No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Av. 5.23 bbld increased
Av. 0.16 mmscfd increased
• Cost
- During PLT work
- 79,689 $US (2017)
- No additional OPEX
• Pay back : 3 Months
• NCF : 1.34 $MM
30. Remaining Potential (B-3 Upper)
30
#2 : No Barrier Case
Simulation grid
RFDP 2012
B3
Proposed perf.
B3 Up.
B-3 Gas Production Rate • No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Av. 35.17 bbld increased
Production Forecasting
Av. 1.15 mmscfd increased
YEAR 2022 2023 2024 2025 2026 2027 2028 Total
Gas
(bcf/yr)
0.18 0.44 0.41 0.39 0.36 0.34 0.29 2.42
Condy
(mbbl/yr)
5.71 13.81 12.71 11.78 10.85 9.93 8.64 73.43
31. 2022 2023 2024 2025 2026 2027 2028 TOTAL
Gas (bcf/yr) 0.18 0.44 0.41 0.39 0.36 0.34 0.29 2.42
Cond (mbbl/yr) 5.71 13.81 12.71 11.78 10.85 9.93 8.64 73.43
Netback Gas
(80% applied, $/mcf)
2.25 2.30 2.34 2.39 2.44 2.48 2.53
Cond ($/bbl) 102.88 89.71 82.64 53.10 54.16 55.25 56.35
CAPEX ($MM) 0.16 - - - - - -
OPEX ($MM) - - - - - - -
Gas ($MM) 0.40 1.02 0.97 0.93 0.88 0.83 0.75 5.78
Cond ($MM) 0.59 1.24 1.05 0.63 0.59 0.55 0.49 5.13
Gas ($MM) 0.16 - - - - - - 0.16
Cond ($MM) - - - - - - - -
NCF $MM 0.83 2.25 2.02 1.55 1.47 1.38 1.23 10.75
Cash-Out
Year
Production
Unit Price
COST
Cash-In
Simple Economics (No Barrier Case)
31
• Cost
- During PLT work
- 79,689 $US (2017)
- No additional OPEX
• Pay back : 1 Months
• NCF : 10.75 $MM
B-3 Gas Production Rate • No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Av. 35.17 bbld increased
Av. 1.15 mmscfd increased
32. Remaining Potential (B-3 Upper)
32
#1 : Barrier Case
B3
Artificial barrier
Simulation grid
RFDP 2012
Proposed perf.
B3 Up.
Production Forecasting
B-3 Gas Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
B-3 Condensate Production Rate
• No B-3 Upper perf
• With B-3 Upper perf
Very minor effect
Very minor effect