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Julio Herbas Pizarro
“SPE Workshop: The Journey to 70% Reservoir Recovery:
Multiple Disciplines, Different Methods, One Go...
Julio Herbas Pizarro
INCREASING THE RECOVERY FACTORINCREASING THE RECOVERY FACTOR
DEVELOPED & UNDEVELOPED FIELDSDEVELOPED ...
SUMMARYSUMMARY
1.1.LATE EOR DEPLETED FIELD STUDIED IN 1978-86LATE EOR DEPLETED FIELD STUDIED IN 1978-86
SHOWED UNATTRACTIV...
EASTERN VENEZUELAEASTERN VENEZUELA
WATER/GAS INJECTION STUDIES 1978-1986WATER/GAS INJECTION STUDIES 1978-1986
EASTERN VENEZUELAEASTERN VENEZUELA
WATER/GAS INJECTION STUDIES 1978-1986WATER/GAS INJECTION STUDIES 1978-1986
•STUDIES BY BECHTELL &STUDIES BY BECHTELL &
LAGOVEN: 1978-1983LAGOVEN: 1978-1983
•FIELD TESTS: STEAMFIELD TESTS: STEAM
INJ...
EASTERN VENEZUELAEASTERN VENEZUELA
LATE WATER/GAS INJECTION JUSEPIN FIELDLATE WATER/GAS INJECTION JUSEPIN FIELD
Production...
UNDEPLETED FIELDS - EL FURRIAL – WATER & MISCIBLEUNDEPLETED FIELDS - EL FURRIAL – WATER & MISCIBLE
GAS INJECTION AT 2500 P...
EASTERN VENEZUELAN WATER & MISCIBLE GASEASTERN VENEZUELAN WATER & MISCIBLE GAS
INJECTION AT 2500 PSI ABOVE BUBBLE POINTINJ...
P = 6400 Psia
@ 13800 feet ss
08/2002
Maintenance Pressure : 6500 Psia
Buble point Pressure: 4500 Psia
CURRENT OIL RATE: ~...
INCREASING RECOVERY FACTORINCREASING RECOVERY FACTOR
INITIAL PRESSURE ~ 5000 PSI ; PB~ 3109 PSI; P @2010 ~2000 PSIINITIAL ...
CENTRAL AFRICA UNDEVELOPED FIELDSCENTRAL AFRICA UNDEVELOPED FIELDS
EOREOR FEASIBILITY STUDIES
Prototype reservoir simulati...
EOR EARLY:EOR EARLY:
• EASTERN VENEZUELA CASES:EASTERN VENEZUELA CASES: EARLY EOR INCREASED RECOVERYEARLY EOR INCREASED RE...
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Abu Dhabi Dec 2014 EOR workshop Julio Herbas

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Abu Dhabi Dec 2014 EOR workshop Julio Herbas

  1. 1. Julio Herbas Pizarro “SPE Workshop: The Journey to 70% Reservoir Recovery: Multiple Disciplines, Different Methods, One Goal” 15-17 December 2014 Jumeirah at Etihad Towers Abu Dhabi, UAE EXPERIENCES INCREASING THEEXPERIENCES INCREASING THE RECOVERY FACTORRECOVERY FACTOR DEVELOPED & UNDEVELOPED FIELDSDEVELOPED & UNDEVELOPED FIELDS
  2. 2. Julio Herbas Pizarro INCREASING THE RECOVERY FACTORINCREASING THE RECOVERY FACTOR DEVELOPED & UNDEVELOPED FIELDSDEVELOPED & UNDEVELOPED FIELDS • EOR DEVELOPED FIELDS SOUTH AMERICAEOR DEVELOPED FIELDS SOUTH AMERICA • EOR UNDEVELOPED FIELDS SOUTH AMERICAEOR UNDEVELOPED FIELDS SOUTH AMERICA • EOR STUDIES NORTH SEA & CENTRAL AFRICAEOR STUDIES NORTH SEA & CENTRAL AFRICA • CONCLUSSIONSCONCLUSSIONS
  3. 3. SUMMARYSUMMARY 1.1.LATE EOR DEPLETED FIELD STUDIED IN 1978-86LATE EOR DEPLETED FIELD STUDIED IN 1978-86 SHOWED UNATTRACTIVE. ~4 BSTB LEFTSHOWED UNATTRACTIVE. ~4 BSTB LEFT UNDERGROUND, HOWEVER DEMONSTRATED VALUEUNDERGROUND, HOWEVER DEMONSTRATED VALUE OF EARLY EOR, LESSON APPLIED IN 1986 DISCOVERY.OF EARLY EOR, LESSON APPLIED IN 1986 DISCOVERY. 2.2.EARLY EOR VALUES, CONCEPT APPLIED IN 1986EARLY EOR VALUES, CONCEPT APPLIED IN 1986 DISCOVERY, INCREASED RECOVERY FACTOR FROMDISCOVERY, INCREASED RECOVERY FACTOR FROM ~12% TO 56%. VALUE >1.6 BSTB.~12% TO 56%. VALUE >1.6 BSTB. 3.3.EARLY EOR REQUIRES PRODUCTION SACRIFICE.EARLY EOR REQUIRES PRODUCTION SACRIFICE. 4.4.OFFSHORE EOR DIFICULT, ANCIENT FACILITIESOFFSHORE EOR DIFICULT, ANCIENT FACILITIES MAKE IT MORE CHALLENGING.MAKE IT MORE CHALLENGING. INCREASING THE RECOVERY FACTORINCREASING THE RECOVERY FACTOR DEVELOPED & UNDEVELOPED FIELDSDEVELOPED & UNDEVELOPED FIELDS
  4. 4. EASTERN VENEZUELAEASTERN VENEZUELA WATER/GAS INJECTION STUDIES 1978-1986WATER/GAS INJECTION STUDIES 1978-1986
  5. 5. EASTERN VENEZUELAEASTERN VENEZUELA WATER/GAS INJECTION STUDIES 1978-1986WATER/GAS INJECTION STUDIES 1978-1986
  6. 6. •STUDIES BY BECHTELL &STUDIES BY BECHTELL & LAGOVEN: 1978-1983LAGOVEN: 1978-1983 •FIELD TESTS: STEAMFIELD TESTS: STEAM INJECTION, WATERINJECTION, WATER INJECTION, GAS INJECTIONINJECTION, GAS INJECTION RESULTRESULT: MARGINAL FIELD: MARGINAL FIELD.. INCREASING RECOVERY FACTOR - DEPLETED FIELDSINCREASING RECOVERY FACTOR - DEPLETED FIELDS EASTERN VENEZUELA 1978-1987EASTERN VENEZUELA 1978-1987 Oil rate 2014: 1000 bopd
  7. 7. EASTERN VENEZUELAEASTERN VENEZUELA LATE WATER/GAS INJECTION JUSEPIN FIELDLATE WATER/GAS INJECTION JUSEPIN FIELD Production plot is notional
  8. 8. UNDEPLETED FIELDS - EL FURRIAL – WATER & MISCIBLEUNDEPLETED FIELDS - EL FURRIAL – WATER & MISCIBLE GAS INJECTION AT 2500 PSI ABOVE BUBBLE POINTGAS INJECTION AT 2500 PSI ABOVE BUBBLE POINT
  9. 9. EASTERN VENEZUELAN WATER & MISCIBLE GASEASTERN VENEZUELAN WATER & MISCIBLE GAS INJECTION AT 2500 PSI ABOVE BUBBLE POINTINJECTION AT 2500 PSI ABOVE BUBBLE POINT ~ 80 WELLS ( ~40I, 40P) WATER INJECTION PRESSURE: 4500 Psi GAS INJECTION PRESSURE 7000 Psi API 27 TO <14 0.4 CPS 1100 SCF/STBAPI 27 TO <14 0.4 CPS 1100 SCF/STB 42 WATER INJECTORS 7 GAS INJECTORS WAG – FLANK WI
  10. 10. P = 6400 Psia @ 13800 feet ss 08/2002 Maintenance Pressure : 6500 Psia Buble point Pressure: 4500 Psia CURRENT OIL RATE: ~340,000 BOPDCURRENT OIL RATE: ~340,000 BOPD CUM PROD~ 3.1 MMSTBCUM PROD~ 3.1 MMSTB CURRENT RF~ 36%CURRENT RF~ 36% TARGET RF: 56%TARGET RF: 56% Por: Nellys Chek-Yan UNDEPLETED FIELDS EASTERN VENEZUELA WATERUNDEPLETED FIELDS EASTERN VENEZUELA WATER INJECTION SINCRONIZED TO ARREST PRESSURE DECLINEINJECTION SINCRONIZED TO ARREST PRESSURE DECLINE WATER INJECT START 1992WATER INJECT START 1992 PROD. SACRIFIED: 4500 STB/DAY -1992PROD. SACRIFIED: 4500 STB/DAY -1992 PROD.SACRIFIED ~40.000 STB/DAY- 1994PROD.SACRIFIED ~40.000 STB/DAY- 1994 GAS INJECTION START 1998GAS INJECTION START 1998 PRODUTION SACRIFIED:PRODUTION SACRIFIED: ~ 35000 STB/DAY - 1998~ 35000 STB/DAY - 1998
  11. 11. INCREASING RECOVERY FACTORINCREASING RECOVERY FACTOR INITIAL PRESSURE ~ 5000 PSI ; PB~ 3109 PSI; P @2010 ~2000 PSIINITIAL PRESSURE ~ 5000 PSI ; PB~ 3109 PSI; P @2010 ~2000 PSI PEAK PRODUCTION ~30000 STB/DAYPEAK PRODUCTION ~30000 STB/DAY LATE EOR - NORTH SEA DEPLETED FIELDLATE EOR - NORTH SEA DEPLETED FIELD EOR STUDY :EOR STUDY : UNATTRACTIVEUNATTRACTIVE
  12. 12. CENTRAL AFRICA UNDEVELOPED FIELDSCENTRAL AFRICA UNDEVELOPED FIELDS EOREOR FEASIBILITY STUDIES Prototype reservoir simulation evaluating Chemical EOR EOR STUDIES NEW UNDEVELOPED FIELDS DEFINING EOR PARAMETERS DEPLETED AND UN-DEPLETED CONDITIONS MICRO MODELS: WATER FLOOD (LEFT) AND CHEMICAL FLOOD (RIGHT). MECHANISTIC & SECTOR MODELLING PILOT TEST PLANNING & FIELD IMPLEMENTATION STUDIES FIELD SCALE SIMULATION
  13. 13. EOR EARLY:EOR EARLY: • EASTERN VENEZUELA CASES:EASTERN VENEZUELA CASES: EARLY EOR INCREASED RECOVERYEARLY EOR INCREASED RECOVERY FACTOR ~15% UP TO 55% VALUE ~1650 MMSTBFACTOR ~15% UP TO 55% VALUE ~1650 MMSTB • PRODUCTION SACRIFICED PAY BACK BY HIGHER CUM PRODUCTIONPRODUCTION SACRIFICED PAY BACK BY HIGHER CUM PRODUCTION EOR LATE:EOR LATE: • STUDIES IN 2 DEPLETED FIELDS EASTERN VENEZUELA RESULTEDSTUDIES IN 2 DEPLETED FIELDS EASTERN VENEZUELA RESULTED UNECONOMICUNECONOMIC <1 BSTB LEFT UNDERGROUND<1 BSTB LEFT UNDERGROUND, BUT DEMONSTRATED, BUT DEMONSTRATED VALUE OF EARLY EORVALUE OF EARLY EOR • EOR OFFSHORE IN DEPLETED RESERVOIRS DIFICULT/MARGINALEOR OFFSHORE IN DEPLETED RESERVOIRS DIFICULT/MARGINAL INCREASING THE RECOVERY FACTORINCREASING THE RECOVERY FACTOR DEVELOPED & UNDEVELOPED FIELDS - CONCLUSSIONSDEVELOPED & UNDEVELOPED FIELDS - CONCLUSSIONS

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