Maraon Basin Block B

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Marañon Basin Block B
Marañon Basin Block B-04
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Marañon B-04 Location Map

• Block configuration - 9723 Km2
• Oil pipeline located NE of the Block
• Chambira Este (filled to spill point) and
  Capirona Oil Fields located just to the East of
  Block
• Four wells drilled on the block
• Ungumayo (Getty, 1975)
• Tigrillo (Getty, 1975)
• Chambira (Getty, 1975)
• Guineayacu (Repsol, 2002)

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Marañon B-04 Location Regional Seismic Profiles

• SW to NE Regional Composite Seismic Line through
• the Mahuaca well
• the Guineayacu wells
• Subcrop edge of the Sarayaquillo
• Onlap edge of the Pucara

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Mahuaca
Guineayacu
Marañon B-04 Regional Composite Seismic Line
U. Tert Mk
Pozo
Chonta Lmst
Base Cret
Subcrop edge of the Sarayaquillo beneath the
Cretaceous
Basement
SW to NE TWT Section
U. Tert Mk
Pozo
Chonta Lmst
Base Cret
Basement
Onlap edge of the Pucara onto basement
SW to NE Flattened (Pozo) Section
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Marañon B-04 Regional Composite Seismic Line

• Mapped Intervals
• Chonta Limestone TWT
• Base Cret to Basement Isochron
• Pozo to Chonta Limestone Isochron
• Upper Tertiary Mk to Chonta Limestone

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Marañon B-04 Location Cross-Section
Cross-Section incorporating all wells on the
Block Ungumayo 1X Guineayacu 1X Tigrillo
1X Chambira 4X (Capirona 1X outside of Block)
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Marañon B-04 West to East Stratigraphic
Cross-Section

• Top Chonta Datum
• Note
• Dramatic west to east thinning of all units
• Termination of the Chonta Lmst between Chambira
  and Capirona Wells
• Continuity of the Raya Shale across the block (a
  regional seal)

Original interpretation by Operator had the well
TDing in the Cushabatay Formation
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Marañon B-04Structure EvaluationUndrilled
Structures
Zancudo 37 Km2 Pastaza Three small
culminations of 25, 14 and 8
Km2 Hortenciacocha 157 Km2 Urituyacu 50 Km2
TWT Chonta Limestone CI 10 msec
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Marañon B-04Structure EvaluationUndrilled
Structures
Zancudo 37 Km2 Pastaza Three small
culminations of 25, 14 and 8
Km2 Hortenciacocha 157 Km2 Urituyacu 50 Km2
TWT Chonta Limestone CI 10 msec
10
Marañon B-04Structure EvaluationUndrilled
Structures
Zancudo 37 Km2 Pastaza Three small
culminations of 25, 14 and 8
Km2 Hortenciacocha 157 Km2 Urituyacu 50 Km2
TWT Chonta Limestone CI 10 msec
11
Marañon B-04Structure EvaluationUndrilled
Structures
Zancudo 37 Km2 Pastaza Three small
culminations of 25, 14 and 8
Km2 Hortenciacocha 157 Km2 Urituyacu 50 Km2
TWT Chonta Limestone CI 10 msec
12
Marañon B-04Structure EvaluationUndrilled
Structures
Zancudo 37 Km2 Pastaza Three small
culminations of 25, 14 and 8
Km2 Hortenciacocha 157 Km2 Urituyacu 50 Km2
TWT Chonta Limestone CI 10 msec
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PROBLEM!
How does one convince potential investors as to
the prospectivity of this block when there are 5
DRY HOLES currently drilled on it ( Mahuaca
just outside of the Block)
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Marañon B-04Structure EvaluationDrilled
Structures
Mahuaca 345 Km2 Ungumayo 232
Km2 Guineayacu 38 Km2 Tigrillo 13
Km2 Chambira 16 Km2
Mahuaca 1X (Texaco 1985) TD
Cushabatay Tested Vivian AC Wet Cushabatay
Mud and WC
TWT Chonta Limestone CI 10 msec
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Marañon B-04Structure EvaluationDrilled
Structures
Mahuaca 345 Km2 Ungumayo 232
Km2 Guineayacu 38 Km2 Tigrillo 13
Km2 Chambira 16 Km2
Ungumayo 4X (Getty 1974) TD Agua Caliente
Tested Vivian AC - Wet
TWT Chonta Limestone CI 10 msec
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Marañon B-04 Structure EvaluationDrilled
Structures
Mahuaca 345 Km2 Ungumayo 232
Km2 Guineayacu 38 Km2 Tigrillo 13
Km2 Chambira 16 Km2
Guineayacu 1X (Repsol 2002) TD Cushabatay
Cushabatay tested 12 bbl oil (360 API) and 115
bbl Fm Wtr 128-152000 ppm Cl
TWT Chonta Limestone CI 10 msec
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Marañon B-04 Structure EvaluationDrilled
Structures
Mahuaca 345 Km2 Ungumayo 232
Km2 Guineayacu 38 Km2 Tigrillo 13
Km2 Chambira 16 Km2
Tigrillo 1X (Getty 1975) TD Cushabatay Log
Shows - Cush Not Tested
TWT Chonta Limestone CI 10 msec
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Marañon B-04 Structure EvaluationDrilled
Structures
Chambira 4X (Getty 1975) TD Raya Not Tested
Mahuaca 345 Km2 Ungumayo 232
Km2 Guineayacu 38 Km2 Tigrillo 13
Km2 Chambira 16 Km2
TWT Chonta Limestone CI 10 msec
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Marañon B-04Regional Block Maps

• At Pozo level block is within the synclinal axis
  of the Basin

TWT Pozo Formation CI 10 msec
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Marañon B-04Regional Block Maps
Structures drilled and undrilled superimposed
over map
TWT Pozo Formation CI 10 msec
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Marañon B-04Regional Block Maps
Base Cretaceous to Basement Isochron CI 20 msec
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Marañon B-04Regional Block Maps
Structures drilled and undrilled superimposed
over map
Base Cretaceous to Basement Isochron CI 20 msec
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Marañon B-04Regional Block Maps
Chonta Limestone to Pozo Isochron CI 10 msec
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Marañon B-04Regional Block Maps
Structures drilled and undrilled superimposed
over map
Chonta Limestone to Pozo Isochron CI 10 msec
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Marañon B-04Regional Block Maps
Chonta Limestone to Upper Tertiary Marker
Isochron CI 5 msec
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Marañon B-04Regional Block Maps
Structures drilled and undrilled superimposed
over map
Chonta Limestone to Upper Tertiary Marker
Isochron CI 5 msec
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What is Prospective and What is Not

• Prospectivity appears to be limited to
• Petroleum System
• Cushabatay Formation reservoir (as the Hollin
  in Ecuador)
• Raya Formation regional seal
• Pucará source rock

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Marañon B-04Cushabatay Prospect Evaluation
Wells in the Region of B-04 Sungachi
Cushabatay Tested Wet Mahuaca
Cushabatay Tested tight Guineayacu
Cushabatay Tested Oil Tigrillo
Cushabatay Untested Pay? Ungumayo
Agua Caliente Chambira Raya Nucaray
Chonta
TWT Chonta Limestone CI 10 msec
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Excellent regional seal developed within the Raya
Guineayacu DST (Cushabatay) Rec 127 bbl diesel
emulsion, 12 bbl oil (360 API) and 115 bbl Fm Wtr
128-152000 ppm Cl
Tigrillo HC log show in upper 40 meters of the
Cushabatay
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Marañon B-04Cushabatay Prospect Evaluation
Wells in the Region of B-04 Sungachi
Cushabatay Tested Wet Analysis Only two
intersecting seismic lines and therefore
difficult to ascertain whether the structure has
a valid closure
TWT Chonta Limestone CI 10 msec
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Marañon B-04 Cushabatay Prospect Evaluation
Wells in the Region of B-04 Mahuaca
Cushabatay Tested tight Analysis The
Mahuaca structure is the largest in the region
and in one of the structurally lowest regions of
the Basin and therefore little H/C available for
remigration. The young age of the structure
prevented an early entrapment of H/C for the
preservation of por/perm
TWT Chonta Limestone CI 10 msec
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Marañon B-04Cushabatay Prospect Evaluation
Wells in the Region of B-04 Guineayacu
Cushabatay Tested Oil Analysis Structure
with ancestral growth tested Pucará sourced 360
API gravity oil from the Cushabatay
TWT Chonta Limestone CI 10 msec
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Marañon B-04Cushabatay Prospect Evaluation
Wells in the Region of B-04 Tigrillo
Cushabatay Untested Pay? Analysis Structur
e with ancestral growth. Upper Cushabatay
appears to have close to 40 meters of untested
pay. SWC attempts were made to recover a sample
of the Cushabatay but hole problems prevented the
test.
TWT Chonta Limestone CI 10 msec
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Marañon B-04 Cushabatay Prospect
EvaluationTigrillo Well
Left Composite log of Cushabatay section in the
Tigrillo Well Right Sonic and deep
resistivity overlay showing a dramatic decrease
in Sws towards the top of the Cushabatay
Formation
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Marañon B-04 Detailed Mapping Areas
Area 2
Area 3
Area 1
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Marañon B-04 Detailed Mapping Area 1
Ungumayo
Guineayacu
Pastaza
Urituyacu
Mahuaca
Chonta Limestone TWT CI 10 msec
Base Cretaceous to Basement Isochron CI 10 msec
Ungumayo
Guineayacu
Pastaza
Urituyacu
Mahuaca
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Marañon B-04 Detailed Mapping Area 1
Ungumayo
Guineayacu
Pastaza
Urituyacu
Mahuaca
Chonta Limestone to Pozo Isochron CI 5 msec
Chonta Limestone to Upper Tertiary Marker
Isochron CI 5 msec
Ungumayo
Guineayacu
Pastaza
Urituyacu
Mahuaca
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Marañon B-04 Detailed Mapping Area 2
Chambira
Tigrillo
Chonta Limestone TWT CI 10 msec
Base Cretaceous to Basement Isochron CI 10 msec
Chambira
Tigrillo
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Marañon B-04 Detailed Mapping Area 2
Chambira
Chonta Limestone to Pozo Isochron CI 5 msec
Tigrillo
Chonta Limestone to Upper Tertiary Marker
Isochron CI 5 msec
Chambira
Tigrillo
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Marañon B-04Detailed Mapping Area 3
Hortenciacocha
Zancudo
Urituyacu
Chonta Limestone TWT CI 10 msec
Pastaza
Base Cretaceous to Basement Isochron CI 10 msec
Hortenciacocha
Zancudo
Urituyacu
Pastaza
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Marañon B-04Detailed Mapping Area 3
Hortenciacocha
Zancudo
Urituyacu
Chonta Limestone to Pozo Isochron CI 5 msec
Pastaza
Chonta Limestone to Upper Tertiary Marker
Isochron CI 5 msec
Hortenciacocha
Zancudo
Urituyacu
Area 3
Pastaza
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What is Prospective and What is Not

• Prospectivity appears to be limited to
• Petroleum System
• Cushabatay Formation reservoir (as the Hollin
  in Ecuador)
• Raya Formation regional seal
• Pucará source rock
• Structures with early growth

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Marañon B-04 Regional Block Maps
Structures drilled and undrilled superimposed
over map
Base Cretaceous to Basement Isochron CI 20 msec
44
What is Prospective and What is Not

• Prospectivity appears to be limited to
• Petroleum System
• Cushabatay Formation reservoir (as the Hollin
  in Ecuador)
• Raya Formation regional seal
• Pucará source rock
• Structures with early growth
• Block is in the lowest region of the Basin
  therefore there is nowhere from which to
  re-migrate oil

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Marañon B-04 Regional Block Maps
Structures drilled and undrilled superimposed
over map
TWT Pozo Formation CI 10 msec
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What is Prospective and What is Not

• Prospectivity appears to be limited to
• Petroleum System
• Cushabatay Formation reservoir (as the Hollin
  in Ecuador)
• Raya Formation regional seal
• Pucará source rock
• Structures with early growth
• Block is in the lowest region of the Basin
  therefore there is nowhere from which to
  re-migrate oil
• Early entrapment of oil to preserve porosity and
  permeability of Cushabatay reservoir i.e Mahuaca,
  a young structure with poor porosity

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Marañon B-04Remaining Prospective Structures
Zancudo 37 Km2 Undrilled
TWT Chonta Limestone CI 10 msec
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Marañon B-04Remaining Prospective Structures
Zancudo 37 Km2 Undrilled Tigrillo
13 Km2 Bypassed Pay
TWT Chonta Limestone CI 10 msec
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Marañon B-04Remaining Prospective Structures
Zancudo 37 Km2 Undrilled Tigrillo
13 Km2 Bypassed Pay Chambira 16 Km2
NDE
TWT Chonta Limestone CI 10 msec
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Marañon B-04Remaining Prospective Structures
Sancudo 37 Km2 Undrilled Tigrillo
13 Km2 Bypassed Pay Chambira 16 Km2
NDE Ungumayo 232 Km2 NDE
TWT Chonta Limestone CI 10 msec
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Marañon B-04 Location Map of all Seismic
Lines colored red are available in SEGY Format
and were used for this interpretation Lines
colored Black are available as PAPER copies and
were not used for this interpretation
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Marañon B-04 Block Summary

• Large Block 9723 Km2
• Close to oil pipeline
• Pucará oil migration route is from kitchen area
  to the west, through the Block to the eastern
  Pucará sourced oil fields, Capirona, Pavayacu and
  Chambira Este
• Cushabatay greatly under explored on the block
• Possible bypassed pay in the Chambira well
• Light oil shows in the Guineayacu well
• The two remaining wells on the Block did not
  penetrate the Cushabatay.
• Remaining undrilled structures are large such as
  Ungumayo which is 232 Km2