Brasil Round 4 Foz do Amazonas Basin. Adhemar Massao Fugita Block Definition Superintendency

Transcrição

1 Brasil Round 4 Foz do Amazonas Basin Adhemar Massao Fugita Block Definition Superintendency

2 Location Map Total Area = 261,170 km 2 Foz do Amazonas Basin km Macapá Pará-Maranhão Basin Belém

3 GENERAL REMARKS Exploration start up Subcomercial Gas - Pirapema Pliocene Probable Original Volume 10.1 BM3 Area of APS-51A Pleistocene Possible Original Volume 7-12 BM3 - Subcommercial oil/gas/cond - Drilling to date Area of APS exploratory wells (1 well/2,808 km2) 92 wildcats and 1 extension

4 Structural Framework Petrobras

5 Schematic Regional Geological Section Petrobras

6 Gravity Map Bloco BT-SL-1 Petrobras

7 Stratigraphy 3 sequences: -Drift- Cenomanian-Recent Amazon delta (canyon dominated) Miocene-Recent - Tucunaré/Pirarucu/Orange Fms. Clastic/Carbonate Platform Paleocene-Miocene Marajó/Amapá/Travosas Fm Transgressive-regressive system Cenomanian-Paleocene Limoeiro Fm -Rift II- Albian-Aptian Caciporé Fm -Rift I- Triassic - volcanics and Calçoene Fm

8 Petrobras

9 Schematic Regional Geological Section Petrobras

10 Source Rocks - Travosas Fm. (Eocene) potential source rock TOC up to 4.5 % - 1-APS kg of HC/rock ton - Limoeiro Fm. (Albian/Cenomanian/Turonian) Marine shales of the transgressive system TOC -1%-5% Type II - Caciporé Fm. (Rift phase II- Albian-Aptian) Lacustrine shales on average 6 kg of HC/rock ton

11 Source Rocks (Advocate D.M. et al.-1999) Post-Rift Phase: - Pirarucu Fm (Miocene-Pleistocene) Potential source rock Can be mature in the deeper portions - Amapá Fm (Paleogene) TOC 1%-5% Restricted to back-reef lagoon - Limoeiro Fm (late Cretaceous) TOC 1%-5% Recognized on the platform and expected to occur in the deep basin

12 Geochemical Profile 1-APS-31A Limoeiro Fm Transgressive Unit DPC&Assoc.

13 1-APS-36 Travosas Fm DPC&Assoc.

14 Reservoirs - Turbiditic sands - Orange Fm. Plio/Pleistocene - Canyonites - Pirarucu Fm - Tertiary porous and fractured carbonates, banks, reefs and talus deposits and calcareous turbidites - Amapá/Travosas Fm. - Deltaic/Turbiditic sands - Limoeiro Fm. - Fluvio-deltaic sands of Rift Phase II Caciporé Fm - Eolian sands Rift Phase I Calçoene Fm

15 Reservoirs - Deltaic sands and turbidites of the Orange Fm - Miocene to Recent - Canyonites Pirarucu Fm - Miocene-Pliocene -Reefs, banks, talus deposits, siliciclastic and carbonatic turbidites, fractured carbonates Amapá and Travosas Fms - Tertiary - Deltaic and turbiditic sands of the Limoeiro Fm - Albianlate Cretaceous (Rift II) - Fluvio-deltaic sands Caciporé Fm - Aptian-Albian - Eolian sands Calçoene Fm (Rift I)

16 Traps structural and stratigraphic - carbonates - banks, reefs, structures associated with growth faults, paleogeomorphic (canyons), fractures - siliciclastics- structures associated with growth faults, shale domes/diapirs, toe-thrust structures, pinch-outs, canyon fill (canyonites) and canyon truncation, faulted blocks Seals - Shales, marls, calcilutites intercalated in target zones

17 - Generation -Limoeiro and Caciporé Fm - oil generation window entry during late Cretaceous/Paleocene -Travosas Fm - oil and gas generation window entry during Plio-Pleistocene - Migration - Amapá, Travosas and Orange Fm - Drift phase normal and listric faults, canyons - Calçoene and Caciporé Fm Rift phase normal faults and direct source rock/reservoir contact

18 Petroleum System Event Chart - Limoeiro-Amapá System DPC&Assoc.

19 Petroleum System Event Chart - Travosas-Pirarucu System(!) DPC& Assoc.

20 Limoeiro-Amapá System(!) Main HC occurrences and generation pods DPC& Assoc.

21 Travosas-Pirarucu System(!) Main HC ocurrences and generation pods DPC& Assoc.

22 BM-FZA-2 BM-FZA-3

23 BM-FZA-2 and 3

24 Seismic and regional wells

25 BM-FZA-2 and 3 Map of available 2D seismic

26 Area 7,682 km2 BM-FZA-2 2D Seismic km 15 exploratory wells (3 of them repeated) - 6 siliciclastic rollover prospects Pirapema (APS-10B) APS-4, 8A, 10B, 15, 34, 40-6 carbonate prospects 5 structural -APS-2, 16C, 17, 36, 25 (this well also with a Rift target) 1 bioherm- APS-24

27 BM-FZA-2 Map of available wells

28 Plays Foz do Amazonas Basin BM-FZA-2 ORANGE FM TURBIDITES rollovers and associated structures, stratigraphic (syndepositional lows) PIRARUCU FM CANYONITES pinch-outs, onlap, differential compaction AMAPÁ AND TRAVOSAS FM CARBONATES Fractures, reefs, banks, paleogeomorphologic, talus deposits, carbonate-turbidites LIMOEIRO FM CLASTICS structural and stratigraphic

29 BM-FZA-3 Area 7,548 km2 2D Seismic km No wells

30 BM-FZA-3 Play TRAVOSAS AND ORANGE FM TURBIDITES structural, stratigraphic and syndepositional traps (mounds)

31 Minimum Work Program - BM-FZA-2 Exploration Period MINIMUM PROGRAM - BM-FZA-2 Length (years) 1st 3 2nd 3 3rd 2 Compulsory Area Relinquishment 50 % of original area 25 % of original area 25 % of original area Work Program/ Investment 5,000 km 2D seismic 2 Wells 2 Wells Financial Guarantee 1st Period = USD 5,000,000

32 Minimum Work Program - BM-FZA-3 Exploration Period MINIMUM PROGRAM - BM-FZA-3 Length (years) 1st 3 2nd 3 3rd 3 Compulsory Area Relinquishment 50 % of original area 25 % of original area 25 % of original area Work Program/ Investment 5,000 km 2D seismic 2 Wells 2 Wells Financial Guarantee 1st Period = USD 5,000,000

33 Carbonate Plays Reefs INTISAR D - LIBYA

34 Recent world reef distribution

35 Global reef distribution Mid Miocene Kiessling W. et al.1999

36 Reef ocurrence over time Kiessling et al.1999

37 Responses to sea level rise Kendall et al. 1991

38 Responses to sea level fall Kendall et al. 1991

39 Responses to sea level fall Kendall et al.1991

40 Reef types accumulation processes Kleypas et al.2001

41 1-APS-21 Subcommercial oil/cond/gas producer Amapá Fm late Miocene HC at the top of the carbonate sequence, corresponding to the canyon base. RFT-1A - oil 19.5 º API Flow 6.4 m3/day, damaged Gas(?) in Pirarucu canyonite(?) m

42 Bacia da Foz do Amazonas 1-APS-21 - Hypotethical Model of Accumulation 42

43 Bacia da Foz do Amazonas 1-APS m Paleocene - General Start up Keep up and Production Dominated Ended by drownig and pollution event Minor cycles of drowning and pollution Local seals 43

44 Bacia da Foz do Amazonas 1-APS m Early Eocene Import Clastic Dominated Drowning and pollution event at base of sequence Base of sandstones = minor order sequences In the basin - development of siliciclastic turbidites 44

45 Bacia da Foz do Amazonas 1-APS m Late/Middle Eocene Keep up and production Dominated At base and top of sequence drowning and pollution events Minor order sequences bounded by minor drowning and pollution events 45

46 Bacia da Foz do Amazonas 1-APS m Oligocene In the upper part Keep up and production Dominated In the lower part Give up and Import Dominated Backstepping Slope deposits 46

47 Bacia da Foz do Amazonas 1-APS m Late/Middle Miocene to Late Oligocene End up in Late Miocene Top of sequence = base of canyon Drowning event in Early Eocene at 1.490m. 47

48 Siliciclastic Plays Pirapema Field Guardado et al.1999 Flat spot = gas/water contact Orange Fm Flat spot = gas/water contact

49 Siliciclastic Plays Niger delta HC Fields Tutlle et al./99 Traditionally used as a model for the Amazon delta May not be valid for shallow water facies Amazon delta = Canyon-dominated submarine delta?

50 Siliciclastic Plays Niger delta Tutlle et al.99

51 Siliciclastic Plays Niger Delta Generation, migration, trapping Tutlle et al./99

52 Siliciclastic Plays Niger delta Physiography Tutlle et al.99

53 Tuttle et al,1999 Niger delta Schematic dip section

54 Deep water of Niger delta Siliciclastic Plays Tutlle et al/99 Amazonas Delta - type Canyon-dominated(?): Structural zoning towards deeper waters: -zone of rollovers w/ith listric faults (some resembling flower strucutures) -zone of shale diapirs -zone of toe thrust -zone of foreocean (equivalent to foreland) 54

55 Traditional Delta Types River-dominated Wave-dominated Tide-dominated Amazon River Delta =Non-traditional Canyon-dominated (submarine) delta (?) 55

56 Amazon River delta- Canyon-dominated (submarine) delta (?) Canyon = predominantly by-pass zone Sedimentation at canyon mouth in deep water - Delta plain/delta front poorly developed, as opposed to Niger Delta - Canyonite deposition under onlap ( transgressive tract and initial highstand) and offlap conditions ( late highstand and lowstand in Type 2 sequences) 56

57 Amazonas River Delta- Canyon-dominated (submarine) delta (?) Foz do Amazonas canyon: Depositional/erosional type Built under highstand and lowstand Highstand- by depositional thinning in relation to adjacent platforms Amapá and Ilha de Santana /Pará Lowstand - by erosion Multi-episodic process active probably since Paleocene 57

58 Amazonas Cone prospects Traditionally apex of rollover strucutures associated with listric faults (Ex- Pirapema). In general very fine and silty sands. Thicker and better reservoirs must be found at canyon mouths in sindepositional lows. The recognition of these lows can be difficult if affected by argillokinesis 58

59 Structural Contour Map Top of Amapá/Ilha de Santana Fm Based on Well data Main prospects in the blocks 59

60 Carbonate Depositional Models

61 Bacia do Pará-Maranhão CORAL REEF MODEL PARCEL MANOEL LUÍS Approximate location 0º30 S e 44º45 W Area around 30 km a circular pinnacles w/50-300m diameter ( cabeços ) covered by corals, algae, sponges, molluscs they project upwards from the bottom up to 30m high.some cabeços outcrop in low tide. 12 species of coral and 4 of hydrocoral patch-reef of keep-up and production dominated types in a carbonate platform drowned by Holocene transgression 61

62 Parcel Manoel Luiz

63 Parcel Manoel Luiz

64 Parcel Manoel Luiz

65 Ilha da Fortaleza (Pará) outcrops Pirabas Fm type-section Early Miocene age Fossils of corals, bryozoans, echinoderms, algae, fish, ostracods, crustaceans, foraminifers, etc. 4 lithofacies: - laminated clays - stratified calcarenites - massive carbonates - biocalcirudites Tavora V.A. et al 1999

66 Ilha da Fortaleza-Pará Tavora V.A. et al 1999

67 Ilha da Fortaleza-Pará Tavora V.A. et al 1999

68 Ilha da Fortaleza-Pará Biocalcirudite Tavora V.A. et al 1999