Ventures Overview

Kenya - Block 3A

Resource Type: Oil, Natural Gas
Property Size: 12,192 km2 (pre 35% -relinquishment which awaits government approval)
Stage of Development: Exploration
Current Work Program: Drilling planned in 2014(two wells total one on 3A, one on 3A or 3B)
Potential: Unknown
Sproule's opinion: Vanoil's holdings are prospective for oil or natural gas (Gross Unrisked Undiscovered Petroleum Initially In-Place P50 3.7 bn boe total blocks 3A and 3B)
Ownership: Vanoil (100%); Kenyan government holds 15% overriding carried interest;

In October 2007, Vanoil signed a Production Sharing Contract for Block 3A (12,192 km2) located mainly in the Anza Graben in northeastern Kenya. Vanoil chose Block 3A based on its technical merits following a study conducted by the company that identified several structural and stratigraphic leads.

Block 3A occupies a convergence area of three sedimentary basins of Anza and Mochesa with the third rift basin of Lamu Embayment occupying the adjacent Vanoil's block 3B to the south. The part of the Anza basin in Block 3A is characterized by the Anza Graben and constitutes the rift termination zone of the Central African Rift System in north east Kenya. The Anza Graben forms the south-eastern extension of the prolific Melut and Muglad rift basins of Southern Sudan where a Cretaceous working petroleum system have been proved and oil discovered. Faulting in Block 3A was initiated in the Mesozoic period and has intermittently been activated through to Tertiary with creation of depo-centres filled primarily with fluvial-lacustrine, deltaic and marine sediments. Potential source rocks for hydrocarbon generation and evidences of a Cretaceous working petroleum system exist in Anza Graben in Chalbi sub-basin to the north-east of Block 3A. Relatively thick (locally in the order of 4,000m) prospective Cretaceous sequences are present in Block 3A. The prolific Melut and Muglad basins have equivalent Cretaceous sequences with a proven working Cretaceous petroleum system responsible for discoveries in the two rift basins.

Hydrocarbon trapping mechanisms in Block 3A include tilted fault blocks, faulted anticlinal closures and stratigrahic traps. The Anza rift termination zone in Block 3A is structurally interesting as a play zone and the detailed interpretation of the re-processed seismic data will further increase structural clarity on faulting and horizon imaging.

Examples of encouraging proximal results include the Africa Oil/Tullow Ngamia-1 well on Block 10BB with ~150 ft net oil pay, their Twiga South 1 well on Block 13T with 2,812 bopd constrained, 37° API waxy crude and Tullow's Paipai-1 well on Block 10A with hydrocarbon shows in Lower Cretaceous. Most recently the Afren/Tullow Ekales-1 wildcat, located in Block 13T ihas made a new oil discovery with results indicating a potential net oil pay in the Auwerwer and Upper Lokone sandstone reservoirs of between 190 and 330 feet.

Onshore activity in Kenya

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Madogashe - Target of 1st Vanoil well

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Vanoil Work Program

  • Reprocessing and interpretation of 3000km regional historic seismic data including the integration with gravity and magnetic data to create a basin model and define structural and stratigraphic leads completed

  • Environmental impact assessments completed

  • 392km of 2D seismic acquired by Vanoil on Block 3A; approximately 3800 gravity stations and 300 magnetic stations data simultaneously acquired and uphole drilling program designed and

  • implemented to deal with statics (Blocks 3A and 3B)

  • Resource analysis study completed

  • 100km2 3D seismic and gravity survey completed over western leads in block 3A; gravity and magnetic data acquired simultaneously

  • Drilling operations commenced at site

  • Drilling of one well planned for Q2 2014 with a second well later in the year on either Block 3A or Block 3B


Kenya Block 3B


Location: Northeast Kenya in Lamu Embayment Basin

Resource Type: Oil & Gas
Property Size: 12,489 km2 (pre 35% -relinquishment which awaits government approval)
Stage of Development: Exploration
Current Work Program: Drilling planned in 2014 (two wells total one on 3A, one on 3A or 3B)
Potential: Sproule's opinion: Vanoil's holdings are prospective for oil or natural gas (Gross Unrisked Undiscovered Petroleum Initially In-Place P50 3.7 bn boe total blocks 3A and 3B)
Ownership: Vanoil (100%); Kenyan government holds 15% overriding carried interest;

Located in northeastern Kenya, Block 3B is the subject of a PSC signed in October, 2007. Most of the Block 3B acreage is located in the Lamu Embayment with a small portion of the block to the northwest probably in the Anza basin. It is also possible that a small area of Block 3B to the northeast is located in the Mochesa basin. Block 3B is relatively adequately covered by magnetic and gravity data with sparse seismic coverage. The Cretaceous basin-fill in the northwest portion of Block 3B was influenced by Anza Graben depositional system resulting in development of local and two possibly prospective Cretaceous depo-centres with a relatively thick (over 4000m) Cretaceous section. Two exploratory wells have been drilled in Block 3B, with a third well drilled by BP-Shell in 1969 located very close to the south-eastern corner of the block 3B acreage. In addition to new seismic show by Vanoil, Block 3B is covered by approximately 475 line-km of fairly good re-processed 2D historic seismic data.

The Lamu Embayment basin was initiated in the Karroo Permo-Triassic times during which an intra-cratonic, tri-radial rifts system developed in East Kenya. This development of the triple junction rifts system heralded the emergence of proto Indian Ocean and culminated in the failure of one of the rift branch which today constitutes the onshore Lamu Embayment basin. The failed Karroo rift extends to the Block 3B acreage. During the subsequent basin-fill in Block 3B the Karroo sequences have been buried thousands of meters below the oil window. During the Jurassic period, Block 3B area experienced marine transgression into the initial Karroo rift-graben which was accompanied by the deposition of mainly marine carbonates and minor shales under platform depositional systems. Faulting in Block 3B continued to Late Mesozoic and Lower Tertiary with emerging rift depo-centres being filled primarily by sediments deposited under fluvial-lacustrine, deltaic and marine depositional systems. The eastern portion of the Block 3B acreage was under marine influence in Middle Cretaceous during which potential source rocks shales and marine carbonates were deposited. During the lower Tertiary, non-marine continental depositional systems were extensive and similar throughout the Block 3B acreage. In the Upper Tertiary however, the southeastern portion of the Block 3B was under marine transgression that resulted in the deposition of Lower to Middle Miocene marine reefal carbonates, sands and shales. The marine transgression barely reached the Anza Graben in the Block 3A. In Block 3B, the Lower-Middle Miocene marine sequence is capped by Pliocene to Quaternary coarse fluvial deposits.

Past studies geological, geophysical and geochemical studies of Block 3B proved the existence of possible fair-good quality oil-prone shale source rocks in the Cretaceous section, in addition to good quality sandstone reservoirs in the Lower Tertiary and several structural traps. The prospectivity of the eastern area of Block 3B is strongly influenced by a structure which continues from southeast to the north along the eastern portion of Block 3B as broad areas of Cretaceous strata on-lapping Jurassic formation.

Historic data suggest that the sedimentary sequences penetrated in Bahati-1 well in Block 3B enter the oil window at 2,400m. The Bahati-1 well encountered Gilsonite, which could be interpreted as degraded, solid residue of generated oil and migrated earlier the Bahati structure, or modified surface seepage oil incorporated into the sediments during their deposition. The Meri-1 well drilled also in Block 3B reached Eocene stratigraphic level and did not test the Cretaceous section play.

Geochemically-analyzed source rock samples mainly from the Lower Tertiary formation were lean in hydrocarbon sourcing potential containing less than 0.55 TOC. However, Meri-1 well did not reach the Cretaceous formation level which is considered to be prospective, thus the area remains unexplored.

Block 3B is near also to the same recently successful and encouraging wells listed under Block 3A.

Onshore activity in Kenya

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Vanoil Work Program

  • Reprocessing and interpretation of 3000 km regional historic seismic data including the integration with gravity and magnetic data to create a basin model and define structural and stratigraphic leads completed

  • Environmental impact assessments completed

  • 536km of 2D seismic acquired by Vanoil on Block 3B; approximately 3800 gravity stations and 300 magnetic stations data simultaneously acquired and uphole drilling program designed and implemented to deal with statics (Blocks 3A and 3B)

  • A well planned in H2 2014 on either Block 3A or Block 3B (in addition to the well planned for Q2 2014 on block 3A

Seychelles


Areas A and B
Location: Located on the Seychelles micro-continent in shallow to deep water in the northern half of the Seychelles plateau
Resource Type: Oil & Gas
Property Size: 14,319 km2
Stage of Development: Exploration
Current Work Program: Drilling planned in 2014/2015
Potential: 2.801 bn boe unrisked Pmean (gross to partners, source: Afren)
Ownership: Vanoil (25%), Avana (75%)

Vanoil holds a 25% working interest in Seychelles Areas A and B with its partner Afren. Areas A and B comprise 14,319 km2 in total and are located on the Seychelles micro-continent in shallow to deep water in the northern half of the Seychelles plateau in a region where Amoco previously drilled three exploration wells were drilled, all of which encountered oil shows and, along with the presence of multiple seeps and tarballs, confirms the presence of a working hydrocarbon system. Some 50,000 line km of 2D regional seismic has been acquired to map the basin. Interpretation points to a Seychelles, thick and contiguous sedimentary section with source (Perma-Triassic-Karoo), reservoir(Perma-Triassic-Karoo) and seal potential source and reservoir.
  • Vanoil and Afren have acquired some 9,000 line km 2D seismic

  • Vanoil and Afren have acquired 3,375 km2 3D seismic

  • Drilling is planned for late 2014

Seychelles 2D seismic
database and wells


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Seychelles 3D seismic and leads&prospects database

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