All articles in the Oil patch Sub-Sahara Section:


Kosmos Throws $75Million In The Hole

By Toyin Akinosho
American minnow, Kosmos Energy will record approximately $75 million to exploration expense in its second quarter 2013 results, “associated with the results” of the Sipo-1 well, onshore Cameroon.

The highly publicized wildcat, drilled on the Ndian River Block in the Rio del Rey Basin(a finger of the Niger Delta Basin), failed to encounter commercial reservoirs. Kosmos says, however, the minor “oil and gas shows evidenced during drilling indicated a working petroleum system”.

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Sahara Shops For A Rig

Sahara Energy plans to move rig to a location on the Oki field in Nigeria’s Oil Prospecting Lease(OPL) 274 in June 2013. The company is working on contracting a rig. It’s interesting; for a company that has held some of the best prospects in the Niger Delta basin for upwards of seven years and never for once moved on to a drilling location.
Last February, Sahara completed acquisition of 500sq km of three dimensional ( 3D) seismic on the lease, which cost $40Million.

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Ivoire 1X Boosts The West African Transform Margin

TOTAL has encountered 28 metres of net oil pay in its Ivoire 1X deep-water exploration well off Cote d’Ivoire.
The well is not tested yet, but the result is a boon for the current geologic thinking focused on the West African Transform Margin(WATM), in which the well is located.
WATM refers to the Cretaceous sequence in the south Atlantic that extends from Nigeria in the east to Sierra Leone in the west. Countries in between include Cote D’Ivoire, Liberia, Benin and Ghana.

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Afren Spuds Ogo-1 Offshore Lagos

London listed Afren is on course to spud Ogo-1 in Oil Prospective Lease(OPL) 310 in the Benin Basin, offshore Lagos. OPL 310 is held by Optimum Petroleum, a Nigerian E&P company. Afren is the technical and financing partner. The well is to be drilled by GSF Monitor, a jack up rig owned by Transocean, to a planned depth of 3,536 metres (or 11,600feet). The site is 24km from the Lagos coastline. Logistics will be provided by Lagos Deep Offshore Logistics, LADOL.

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Conoil Appraises, Deepens Its Ango Discovery

Majestic Closeup on Location

With 4,000BOPD flowed in two zones in discovery well, operator wants to find out what lies deeper
By Fred Akanni

Conoil, the Nigerian independent, has moved the HTHP swamp barge Majestic to Ango-2, to appraise the deep oil zones it tested in Ango-1 Sidetrack 3 and even probe deeper.

Ango-2 is prognosed to drill to a total depth(TD) of 18,500ft (or 5639metres)  True Vertical Depth (TVD), meaning that it still wants to probe the reservoirs it could not reach, due to tough drilling conditions, in the discovery well.

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Anadarko Hits A Duster Offshore Kenya, But..

American independent Anadarko has completed drilling its Kubwa well in the L-07 Block offshore Kenya, which encountered non-commercial oil shows in reservoir-quality sands.

It’s the company’s first probe of Kenya’s deepwater, and the second well in the terrain in eight months. The Mbawa South well  in Block 8, drilled in third quarter 2012 by Apache Corp., another American independent, encountered 53metre net gas pay, making it the first hydrocarbon discovery offshore Kenya,

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TOTAL Hits A Fourth Duster In Uganda

TOTAL Hits A Fourth Duster In Uganda

TOTAL continued its streak of dry holes in Uganda’s Lake Albert Basin, with the Ondyek-1 exploration well proving the fourth duster in two months.
Ondyek-1 did not encounter hydrocarbons and has been plugged and abandoned. The well, located 16km North West of the Nigiri-1 oil discovery in the company’s operated EA-1A block to the north of the basin, was the fifth in a drilling campaign designed to test the boundary limits of the TOTAL operated EA-1A Block.
The other dry holes, drilled between December 2012 and February 2013, include: Riwu-1 (tested far northwestern limits), Raa-1 (tested northern extent), and Til-1 (tested far northeastern limits). Ondyek-1 was drilled to a total depth of 1,462 metres.

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Kenya: Flow Rates Prove Commerciality

The proof that crude oil can be mined in commercial quantities in Kenya has been shown by the results of drill stem tests in the Twiga South 1, one of the two onshore oil discoveries in the country in 2012.

Operator Tullow Oil recorded a cumulative rate of 2,812 BOPD in three separate sands in the Auwerwer formation in the well, after carrying out five flow tests between January and late February, 2013.

One test (DST 3)flowed at a maximum natural flow rate of 1,860 BOPD of 37°API oil, another (DST 4A) flowed at a rate of 491 BOPD  while the third (DST 5)flowed 461BOPD, using a Progressive Cavity Pump (PCP).

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Africa’s 2012 Hydrocarbon Finds

  • Cobalt reported that its Came iapre salt oil discovery in Block 21,offshore Angola, flowed at an unstimulated, sustained rate of 5,010 barrels per day.
  • Statoil described its Zafarani discovery in Block 2 offshore Tanzania a “high impact

discovery” with as much as 5 Tcf of gasin place. ExxonMobil is a partner in the well.

March

Offshore Nigeria, Afren and Amni tested a light oil discovery on OML

112. Afren claimed that future horizontal wells at its Okoro East oil discovery, offshore

South east Nigeria, should yield 4,500-7,000barrels of oil per day per well.

 May

  • Onshore Kenya, Tullow Oil’sNgamia-1 well found more than 328 feetof oil pay over a gross oil-bearing intervalof 2,130 feet in multiple zones.
  • Anadarko Petroleum added seven to 20-plus Tcf of recoverable gas offshore Mozambique at an explorationstrike about 30km northwest of its Prosperidade complex.
  • In an exploratory well on the Ebok North Fault Block offshore south east Nigeria, Afren and Oriental Energy Resources identified 370 feet true verticalthickness of net oil pay in what Afren described as  “excellent quality reservoir sands.”
  • BG Group reported a fifth gasdiscovery offshore Tanzania with the Mzia-1exploratory well on Block 1 – a first successin the deeper Cretaceous section.
  • Agiba, a joint operating company, operated the Emry Deep 1X well about 288km southwest of Alexandria in Egypt,which encountered 250 feet of net pay in multiplesandstones of the Lower Cretaceous Alam El Bueib Formation and flowed 3,500barrels/day during testing.
  • Offshore Mozambique, an AnadarkoPetroleum partnership hit more than 300 netfeet of natural gas pay in two high-qualityOligocene fan systems with the Atum discovery well in Offshore Area 1 in theRovuma basin.

June

Tullow Oil’s Paon-1X deepwater exploration well, a light oil discovery in a Turonian fan system in the CI-103 licenseoffshore Cote d’Ivoire, extended a provenoil play westward from previous discoveriesoffshore Ghana.

July

In Offshore Area 4, Mozambique, ENI’sMamba North East-2 giant gas discoveryencountered more than 650 feet of payin stacked, multiple, high-quality zones,adding at least 10 Tcf to the play’s potential. The Papa-1 deepwater wildcat on Block 3 offshore Tanzania became the first

Cretaceous gas discovery outboard of the Rufiji Delta, according to partners Ophir Energy and BG.

November

  • Tullow Oil said Twiga South-1 in Block13T, onshore Kenya, found 98 feet of net oilpay with further potential to be assessed.
  • The Mamba South 2 and Coral 2delineation wells in Area 4, Mozambique, added about six Tcf potential in the Mamba complex for ENI and partners.


The Party Last Time Africa’s 2012 Hydrocarbon Finds February AAPG 14 JANUARY 2013 WWW.AAPG.ORG

  • Cobalt reported that its Cameiapresalt oil discovery in Block 21,offshore Angola, flowed at an unstimulated,sustained rate of 5,010 barrels per day.
  • Statoil described its Zafarani discovery inBlock 2 offshore Tanzania a “high impact

discovery” with as much as 5 Tcf of gas inplace. ExxonMobil is a partner in the well.

March

Offshore Nigeria, Afren and Amnitested a light oil discovery on OML

112. Afrenclaimed that future horizontal wellsat its Okoro East oil discovery, offshore

southeast Nigeria, should yield 4,500-7,000barrels of oil per day per well.

May

  • Onshore Kenya, Tullow Oil’sNgamia-1 well found more than 328 feetof oil pay over a gross oil-bearing intervalof 2,130 feet in multiple zones.
  • Anadarko Petroleum added sevento 20-plus Tcf of recoverable gasoffshore Mozambique at an explorationstrike about 30km northwest of itsProsperidade complex.
  • In an exploratory well on the EbokNorth Fault Block offshore southeastNigeria, Afren and Oriental EnergyResources identified 370 feet true verticalthickness of net oil pay in what Afren described as  “excellentquality reservoir sands.”
  • BG Group reported a fifth gasdiscovery offshore Tanzania with the Mzia-1exploratory well on Block 1 – a first successin the deeper Cretaceous section.
  • Agiba, a joint operating company,operated the Emry Deep 1X well about 288km southwest of Alexandria in Egypt,which encountered 250 feet of net pay in multiplesandstones of the Lower Cretaceous AlamEl Bueib Formation and flowed 3,500barrels/day during testing.
  • Offshore Mozambique, an AnadarkoPetroleum partnership hit more than 300 netfeet of natural gas pay in two high-qualityOligocene fan systems with the Atumdiscovery well in Offshore Area 1 in theRovuma basin.
  • June

Tullow Oil’s Paon-1X deepwaterexploration well, a light oil discovery in aTuronian fan system in the CI-103 licenseoffshore Cote d’Ivoire, extended a provenoil play westward from previous discoveriesoffshore Ghana.

July

In Offshore Area 4, Mozambique, ENI’sMamba North East-2 giant gas discoveryencountered more than 650 feet of payin stacked, multiple, high-quality zones,adding at least 10 Tcf to the play’s potential.The Papa-1 deepwater wildcat onBlock 3 offshore Tanzania became the first

Cretaceous gas discovery outboard of theRufiji Delta, according to partners OphirEnergy and BG.

November

  • Tullow Oil said Twiga South-1 in Block13T, onshore Kenya, found 98 feet of net oilpay with further potential to be assessed.
  • The Mamba South 2 and Coral 2delineation wells in Area 4, Mozambique,added about six Tcf potential in theMamba complex for ENI and partners.

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