production Blocks

Marib – Al Jawf Block (18)

95% of oil and gas which have been discovered in the Block (18) coming from the Jurassic Alif Formation. Oil exploration continued with propose to discover HC from the fractured Basement and other secondary formations.
The field structures in the contract area are generally faulted dip closures formed in response to regional extension and related salt activity. The primary trap types are tilted fault blocks draped by Late Jurassic reservoir sands. Many of the traps evolved in the Late Jurassic as a result of gentle eastward tilting and extension. This produced a series of low angle listric faults, with shallow detachment horizons in Jurassic evaporites. the majority discoveries having been made between 1984 and 1995.

Production in the Marib – Al Jawf Block peaked at 197,600 b/d in 1991.

The Marib – Al Jawf Block contains more than 21 oil and gas fields.

The main reservoirs in the block:
- Alif Formation Sand/Sandstones,
- Seen Formation Sand,
- Shaqra, Lam and Meem Formations reservoir (non-commercial yet),
- Fractured Basement reservoir (sub-commercial yet).

Main Seismic Work:
- Hunt Oil 2D
- Hunt Oil 3D
- Safer (SEPOC) 3D
More than 710 wells were drilled in the block.

Block (18) Facilities:
Oil is processed through two main facilities in the Marib area; these facilities are the Central Production Unit (CPU) and the Kamil Production Unit (KPU).

The oils in Block (18) fields are generally of high gravity, in the range (35-48° API). The oils are gas saturated and generally sweet, with sulphur content of less than 0.1%.

In 1986, a pipeline (of 438 Km long, 24-26″ diameter, with maximum capacity of 300,000 BOPD) was completed allowing the transportation of Crude from the Marib – Al Jawf fields to the Ras Issa export terminal (maximum storage 3,000,000 barrel) on the Red Sea.
The main Marib to Ras Issa pipeline was also used by the nearby Jannah (5, S1 and S2) Blocks to transportation of crude oil from the Marib/Shabwa areas to the Ras Issa export terminal.
The Block supplies Marib Refinery Company with 10,000 bbls per day.

Damis Block (S1)

Damis Damis Block (S1)

Damis Block (S1) located in in Saba’tayn (Marib-Shabwa) Basin, With area of (1,156) Km². It lies west of the productive Jannah Block 5 fields and east of the productive Ayadh Block 4 fields.

Block (S1) was awarded to TransGlobe Energy on June 28^th 1998. Vintage Petroleum Yemen, Inc (VPYI), farmed in for a 75% interest, in exchange for financing 100% of TransGlobe’s first phase exploration. Operatorship of the block was subsequently transferred to Vintage in October 1998. In September 2005 Occidental announced its acquisition of Vintage Petroleum. The acquisition was completed on 30 January 2006 making Occidental, through its wholly owned subsidiary, the operator of the Damis Block.

In May 1993 during Shell’s period as operator, it discovered 39° API oil in the Lam formation with the An Nagyah-1 well.
The An Naeem-1 well the first discovery made by Vintage Petroleum on Block S1 in February-May, 2000. The reservoir flowed gas/condensate from the Alif formations (main Alif tasted 519 bcpd and 19.9 mmcfpd, Lower Alif tasted 514 bcpd and 19.7 mmcfpd and Alif Dolomites tasted 243 bcpd and 7.7 mmcfpd).
In May-June, 2000, Harmel-1 discovered oil. The well tested oil from Qishn, Sarr and Upper Naifa (Azal) Formations at oil rates between 400 to 500 bopd).
The An Nagyah-2 well discovered oil/gas by Vintage Petroleum on Block S1 in November-December, 2002. The reservoir flowed oil and gas from the Lam formation (Lam tasted 1091 bopd 45.6° API and 543 mcfpd,).
In November, 2006, Osaylan-2 discovered oil in the Lam formations (Lam tested at oil rates 1,307 bopd and 615 mcfgpd).

The block extends from the western margins of the Marib-Shabwa rift basin, north-eastwards, across a series of tilted half grabens and the extension of the Alif horst, into the deepest parts of the graben system. The An Nagyah’s trap type is a combination of structural-stratigraphic, with a gas cap drive.

In October 2003, Declaration of Commerciality in the Damis Block (S1).

The first oil production from the Block was on the 28 March 2004.

Production in the Damis Block peaked at 11,731 b/d in 2008.

The block contains 4 fields.

The main reservoirs in the block:
- Qishn Formation Clastics/Carbonates,
- Sarr Formation Carbonates,
- Naifa Formation Carbonates,
- Alif Formation Clastics,
- Lam Formation Clastics,
- Basement fractured reservoir.

Seismic Works:
- Shell 2D
- Shell 3D
- Vintage / Occidental 2D
- Vintage / Occidental 3D
50 wells were drilled in the Block.

Block (S1) Facilities:
CPF Capacities:
Separation
- LP Separator: 15 Mbopd, 5 Mbwpd, 6 MMscfd
- HP Separator: 15 Mbopd, 7.5 Mbwpd, 30 MMscfd
Compression
- LP Compression: 6 MMscfd to 300 psig
- HP Compression: 28 MMscfd to 1800 psig
- Reinjection: 27 MMscfd
- Flare Tip: 60 MMscfd
Oil Export: 3 x 15000 bpd
Water Disposal: 4 x 3500 bpd
Power: 3 x 1 MW; 1 x .85 MW

An Naeem Field produced from the Alif Clastics with an average 58-63.7° API condensate.
An Nagyah Field produced from the Lam Clastics with an average 43° API oil. The oil has viscosity 0.56 cp and Sulphur (0.6%).
Harmel Field produced 13-23° API oil from the Qishn, Sarr and Naifa Formations. The oil has Sulphur (2.1%).

In 2005, a 28-kilometer, 10-inch pipeline was completed, connecting the CPF to the Jannah Hunt export pipeline allowing the transportation of Crude through the Marib – Al Jawf fields to the Ras Issa export terminal on the Red Sea.

Uqlah Block (S2)

Uqlah Block (S2) located in in Saba’tayn (Marib-Shabwa) Basin, With area of (904) Km². It lies south of the productive Ayadh Block 4 fields.

In the 1990s, Occidental commenced exploration on Block (S2). Block (S2) was awarded to Preussag Energy GmbH on March 21^st 1998. In early 2003 OMV acquired Preussag’s entire exploration and production portfolio, operatorship of the block was subsequently transferred to OMV.

In March-June 1992 during Occidental period as operator, it discovered an oil in Kharwah-1, the well flowed about 900 bopd during the initial test phase from the Kohlan Fm and most probably also from the crystalline Basement. Re-entry and a multi rate test was performed by Preussag in March/April 2001 ,where the well produced 960 bopd.
The Habban-1 well the first discovery made by OMV on Block S2 in April-August, 2005. The multi rate DST showed production rates between 352 and 1403 bopd and 1,632 Mscf/d gas from the crystalline Basement.

The Habban structure is part of the Central Basement High area which is separating the half-graben areas. The Habban structure is a normal fault bounded 4–way dip closure at the top Basement level and in the Lam.

In January 2006, Declaration of Commerciality in the Uqlah Block (S2).

The first oil production from the Block was on the December 2006.

Production in the Uqlah Block peaked at 16,697 b/d in November 2010.

The block contains 1 oil field.

The main reservoirs in the block:
- Lam Formation Clastics/Carbonates,
- Kohlan Formation Clastics,
- Basement fractured reservoir.

Seismic Works:
- Occidental 2D
- OMV/Preussag 2D
- OMV/Preussag 3D
48 wells were drilled in the Block.

Block (S2) Facilities:
CPF Capacity 30,000 bbl oil.

Habban Field produced from the Fractured Basement with an average 40° API oil. Oil Viscosity (@ res. conditions) 0.355 cp.

The operator has been trucking oil production 140 kilometers from the Habban field to the Marib-AlJawf (Safer) facilities, where it enters the main Marib export pipeline allowing the transportation of Crude through the Marib – Al Jawf fields to the Ras Issa export terminal on the Red Sea. Currently, oil is being trucked to facilities at Block 4 allowing the transportation of crude oil to the Main Oil Line for export through the Bir Ali (Al Nushaima) Terminal on the Gulf of Aden.

East Sarr Block (53)

East Sarr Block (53) located in the central part of Yemen in (Sayun-Masila) Basin, With an area of (474) Km². It lies immediately north-west of the productive Masila Block 14 fields, and north-west of the East Shabwa Block 10 fields.
The Block was awarded to Dove Energy Company in January 1998. In February 2015 Ministerial resolution was issued to establish a State-owned national company PetroSarr to operate the Block 53.

Dove Energy drilled second well, Sharyoof-1, was spudded in June 2000. Oil was discovered in the Qishn S1A reservoir. The well flowed 30° API oil at a rate of 4,850 b/d. The operator drilled Sharyoof-2 in November 2000.
In 2006 Dove Energy drilled Bayoot SW-1 targeting the basement reservoirs and encountered oil shows. The vertical well was drilled into the basement, but also penetrated prospective carbonates at higher intervals. The results of the next well, Bayoot SW-2. Testing of the well yielded 1,000 b/d of oil. Bayoot South-1, was drilled south of Bayoot SW-1 and SW-2 to test the Madbi formation, and successfully flowed oil.
Raoq-1, spudded in October 2008, initially provided strong indications of hydrocarbons in the Basement. However, the oil did not flow freely on test in 2009.

Field structures in the Block are generally faulted dip closures, associated with extensional normal faults characteristic of rift basins. The primary trap types are tilted fault blocks draped by Upper Jurassic reservoir sands. Many of the traps evolved in the Middle-Late Jurassic as a result of eastward tilting and extension. This produced a series of tilted fault blocks and half grabens.

The East Sarr Block was declared commercial in July 2000.

The first oil production from the Block (Sharyoof field) was in December, 2001. In September 2006, Production started from Bayoot field.

Production in the East Saar Block peaked at 22,500 b/d in 2002. A plateau of around 18,000 b/d was maintained between 2003 and 2005 before production began to decrease.

The Block contains 3 oil fields.

The main reservoirs in the block:
- Qishn Formation sand/Sandstones,
- Madbi Formation Carbonate,
- Fractured Basement reservoir.

Main Seismic Works:
- Dove Energy 2D
- Dove Energy 3D
54 wells were drilled in the block.

Sharyoof produced 30° API oil from the Upper Qishn S1A sand. Bayoot produced 38° API oil from the Basement Reservoirs.

Block (53) Facilities:
- Sharyoof Central Processing Facility (CPF), located to the west of the field. The CPF was built in 2001 and can process 25,000 b/d of crude, 15 million cubic feet of gas per day3 and up to 220,000 b/d of water.
- Bayoot Central Processing Unit (B-CPU)

A 67-kilometer, 10-inch diameter pipeline with capacity of 35,000 b/d transported crude from the Sharyoof CPF to the Masila production facilities allowing the transportation of crude oil from the East Sarr fields to the Masila Main Oil Line for export through the Ash Shihr Terminal on the Gulf of Aden.
In February 2009 a 10-kilometer Bayoot-Sharyoof pipeline was completed linking the new Bayoot production facilities with Sharyoof

East Al Hajr Block (51)

East Al Hajr Block (14) located in the central part of Yemen in (Sayun-Masila) Basin, With an area of (2,042) Km². It lies immediately west of the productive Masila Block 14 fields, and north of East Shabwah Block 10 fields.
The Block was awarded to Kerr-McGee Company on 3 April 1997. In April 1998, Nexen (formerly Canadian Occidental) farmed into the block. In 2001, Kerr-McGee decided not to enter the second exploration period and the company’s interest reverted to Nexen which became the operator. State-owned Masila Petroleum Exploration and Production Company (PetroMasila) in June2015, become the National Operator of the Block 51.

Nexen drilled Tammum-1 (later renamed Bashir Al Khair A “BAK A-1”) and Amir-1 (later renamed Bashir Al Khair B “BAK B-1”) exploration wells in 2003. Both wells tested oil in the Qishn and Saar horizons.
Four exploration, three of which were unsuccessful and one, Bashir Al Khair-K1 well was drilled in 2005 reported as a discovery in early 2006. The Bashir Al Khair-K1 well tested an average of 908 b/d of condensate and 27 mmcfd of gas.
First oil from the BAK-A field was produced in November 2004. The field was initially brought to production at 4,000 b/d. BAK-B came to production at the end of 2005.

The East Al Hajr Block was declared commercial in December 2003.

The trapping style at East Al Hajr Block 51 for the Lower Qishn 2 is a combination stratigraphic and four-way dip closure or 3-way dip closure with a sealing bounding fault.
Trapping in the Upper Saar A, B, C and D reservoirs is primarily a 3-way dip closure with a sealing bounding fault and 4-way, fault- independent structural closures draped over basement highs.

Production in the East Al Hajr Block peaked at 25,562 b/d at end-2005.

The Block contains 3 oil fields.

The main reservoirs in the block:
- Qishn Formation Sandstones,
- Saar Formation Carbonate & Sandstones,
- Madbi Formation Carbonate & Madbi Fan,
- Fractured Basement reservoir.

Main Seismic Work:
- Kerr-McGee 2D
- Canadian Oxy/Nexen 3D
115 wells were drilled in the block.

Block (51) Facilities:
- Central Production Facility (CPF) with a 35,000 bopd capacity;
- Central Power Plant (CPP).

Bashir Al Khair A (BAK “A”) produced 34° API oil from the Upper Qishn S2 sand. Bashir Al Khair B (BAK “B”) produced 26° API oil from the Upper Qishn S1A and S1C, and 32° API oil from the Lower Qishn LQ2 sand.
The oil produced from all producing formations has low sulphur, metal and acid content.

A 16-inch, 22 kilometer oil pipeline was completed allowing the transportation of crude oil from the East Al Hajr fields to the Masila Main Oil Line for export through the Ash Shihr Terminal on the Gulf of Aden.

South Howarime Block (43)

South Howarime Block (43) located in the central part of Yemen in (Sayun-Masila) Basin, With an area of (2,026) Km². It lies immediately west of the productive Masila Block 14 fields.

The Block was awarded to First Calgary / Ocean Energy on 25 July 1998. In September 2001, the Norwegian DNO farmed into the block for the second phase of exploration and became operator of the Block.

At the end of March 2004 DNO discovered oil with the Nabrajah-1 well. The well was tested and flowed oil from the Qishn Sandstone S1 and S2 from an intervals between 1,769 – 1,781 meters, which flowed 25.3° API oil at a stabilized rate of 1,973 b/d, 2.4 mmcfd of gas. The gas-oil ratio was 1,226 scf/bbl.
The Nabrajah-2 well, flowed at a rate of 1,427 b/d from an interval between 1,933-1,935 meters. Hydrocarbons were also encountered within the basement. A drill stem test between 2,376 and 2,545 metres flowed at a stabilized rate of 15.2 mmcfd of gas and 313 b/d of condensate (62.6° API).
In March-April 2005, Nabrajah-5 discovered oil in the Basement and Naifa formations. During testing, the well flowed 38° API oil at rate 5,800 b/d and 4.162 mmscf/d from the Basement and 40.9° API oil at rate 4,180 b/d and 3.039 mmscf/d from the Naifa formation. Both reservoirs flowed significant volumes of gas.

The South Howarime Block was declared commercial in April 2005.

On 5 July 2005, the Nabrajah field started production at a rate of 5,000 b/d, all of which sourced from the Qishn sandstones.

Production in the Howarime Block peaked at 9,060 b/d in 2006.

The Block contains 1 oil field.

The main reservoirs in the block:
- Qishn Formation Sand/Sandstones,
- Naifa Formation Carbonate,
- Fractured Basement reservoirs.

Main Seismic Work:
- Ocean Energy 2D
- DNO 2D
- DNO 3D
38 wells were drilled in the block.

Block (43) Facilities:
- Qishn Central Production Facility (QCPF), capacity 50,000 barrels oil per day, 3.5 million cubic feet/day of gas.
- Basement Central Production Facility (BCPF), capacity 25,000 barrels oil per day, 60 million cubic feet/day of gas.

Nabrajah Field produced 28-39° API oil from the Upper Qishn sand/sandstones reservoir. The Nabrajah Field produced 41° API oil from the Naifa Carbonate Formation. The Nabrajah Field produced 38-62.6° API oil from the Basement Reservoir

An 8 inches, 22 kilometer with capacity of 17,500 b/d oil pipeline was completed allowing the transportation of crude oil from the South Howarime fields to the Masila Main Oil Line for export through the Ash Shihr Terminal on the Gulf of Aden.

Howarime Block (32)

Howarime Block (32) located in the central part of Yemen in (Sayun-Masila) Basin, With an area of (592) Km². It lies immediately north of the productive Masila Block 14 fields, and west of East Sarr Block 53 fields.

The Block was awarded to Clyde Petroleum (now Gulf Canada Resources Ltd) on 24 March 1992. Following the first discovery in 1998, Clyde sold its interest in the block to Norwegian DNO which became operator of the Block.

In June 1997, The operator drilled the Tasour-1 well and discovered oil in the Qishn clastics, the well flowed at a rate of 4,869 b/d of 29° API crude. In 1999, the Tasour-3 appraisal well tested 2,100 b/d of oil from the Qishn sand reservoir.
In early 2006, the Godah Field was discovered. Godah-1 tested 1,839 b/d of 22° API oil with 4.4 mmcfd gas from the Qishn formation.
In October, 2013, the Salsala Field was discovered. Salsala-1 tested the interval 3,599 – 3,631 meters with maximum flow rate of 3,400 b/d of 36-37° API oil from the Shuqra Dolomite formation and 16 bopd from the interval (3,776 m – 3,785 m MD) in the Kuhlan formation.

The Howarime Block was declared commercial on December 18, 1999.

The Tasour field started production from the Tasour-1 well on 3^rd November 2000.
The Godah field was brought to production in October 2006.

The Tasour field comprises an east-west elongated anticlinal closure which is bounded by a regional (east-west oriented) rift fault on its southern margin. The field was originally believed to be segmented into two compartments by a NW-SE oriented fault, but a re-survey of the well elevations has shown that the field comprises a single, continuous pool.

Production in the Howarime Block peaked at 17,810 b/d in 2004.

The Block contains 3 oil fields.

The main reservoirs in the block:
- Qishn Formation Sandstones,
- Shuqra Formation Carbonate,
- Kuhlan Formation Sandstones,
- Fractured Basement reservoir.

Main Seismic Work:
- Clyde Petroleum 2D
- DNO 2D
- DNO 3D
54 wells were drilled in the block.

Block (32) Facilities:
- Central processing facility (CPF) capacity 199,500 barrels oil/water per day.
- Godah processing facility (GPF) capacity 10,000 barrels oil/water per day, 10 million cubic feet/day of gas.
- Central processing facility (CPF) is connected by flow lines to Tasour production wells. It includes process trains to meet transport of the crude and includes:
- Dehydration facilities
- Oil storage
- Water skim tank
- Power generation
- Living and storage facilities

Tasour Field produced 25-29° API oil from the Upper Qishn S1A sand reservoir. The Godah Field produced 22° API oil from the Qishn Formation. The Salsala Field produced 36-37° API oil from the Shuqra Formation

In 2000, an 8 inches, 59.7 kilometer with capacity of 25,000 b/d oil pipeline was completed allowing the transportation of crude oil from the Howarime fields to the Masila Main Oil Line for export through the Ash Shihr Terminal on the Gulf of Aden.
At the end of 2006, a 10-inch 23-kilometre pipeline from Godah to Tasour was completed, allowing Godah crude to be transported to the processing and water handling facilities in Tasour, where it is treated and added to Tasour production.
A pipeline from Godah to Tasour CPF was completed in early 2008, to transport gas from the Godah field for power generation.

Masila Block (14)

Masila Block (14) located in the central part of Yemen in (Sayun-Masila) Basin, With an area of (1,275) Km².
The Block was awarded to Canadian Oxy Company in December 1987. After expiry of that block’s Production Sharing Agreement with the former Canadian operator State-owned Masila Petroleum Exploration and Production Company (PetroMasila) on December 18, 2011, become the National Operator of the Block 14.
The Masila Block is one of the three largest oil producing blocks in Yemen, along with the Marib-AlJawf and East Shabwa Blocks.
The Masila Block was declared commercial in December 1991 and the operator started development plan in order to bring the Sunah, Heijah and Camaal fields to production by 1993.
Since 1991, eighteen commercial oil fields have been discovered and brought to production, of which the Camaal, Tawila, and Sunah fields are the largest.

Oil has been discovered in the Block (14), with over 80% coming from the Cretaceous Qishn Formation. Around 15% of Masila’s oil production is produced from the fractured Basement, of which most is produced in the northwest of the block in and around the Sunah fields.
Most discoveries are associated with intra-basinal highs, especially the Masila High, the majority having been made between 1991 and 1995.
By 2001-2002, work programmes were concentrating on achieving production from secondary horizons in the Masila block using waterflood techniques on the Upper Saar reservoirs.

The Block contains 18 oil fields.

Production in the Masila Block peaked at 233,000 b/d in 2003.

The main reservoirs in the block:
- Qishn Formation Sandstones,
- Saar Formation Carbonate & Sandstones,
- Madbi Formation Limestones,
- Kuhlan Formation Sandstones,
- Fractured Basement reservoir.

Main Seismic Work:
- Canadian Oxy/Nexen 2D
- Canadian Oxy/Nexen 3D
- PetroMasila 3D
656 wells were drilled in the block.

Block (14) Facilities:
- Central Processing Facility (CPF), capacity 260,000 barrels oil per day, capacity 650,000 barrels water per day;
- Central Power Plant (CPP) capacity 61MW;
- Diesel Topping Plant for providing diesel for operations, capacity 7,000 bpd;
- 137km (24”) Export Pipeline to carry crude oil from the CPF to Ash-Shihr export terminal.

The oils in Block (14) fields have (28°-32° API) gravity for the main reservoirs, light oil in the basement rocks with (41° API).

In 1993, a pipeline (of 138 Km long, 24″ diameter, with maximum capacity of 325,000 BOPD) was completed allowing the transportation of crude oil from the Masila fields to the Ash Shihr export terminal (maximum storage 3,500,000 barrel) on the Gulf of Aden.
The first cargo of crude oil from the Masila Block was exported from the Ash Shihr terminal on 5 August 1993.
The main Masila to Ash Shihr pipeline was also used by the nearby (10, 32, 43, 51 and 53) Blocks to transportation of crude oil from the Masila areas to the Ash Shihr export terminal.

East Shabwah Blocks (10)

East Shabwah Block (10) located in the central part of Yemen in (Sayun-Masila) Basin, With an area of (953) Km².
The Block was awarded to Total Company in October 1987. State-owned Masila Petroleum Exploration and Production Company (PetroMasila) in December 2015, become the National Operator of the Block 10.
The East Shabwah Block is one of the three largest oil producing blocks in Yemen, along with the Marib-AlJawf and Masila Blocks.
The East Shabwah Block was declared commercial in December 1995 and the operator started development plan in order to bring the Kharir, Atuf and Wadi Taribah fields to production by 1997-1998.
Since 1992, four commercial oil fields have been discovered and brought to production, of which the Kharir field is the largest.
Kharir Field Discovery 1992, the first commercial discovery well on the block, Kharir-1, was spudded in 1992 and flowed 5,000 b/d of oil. This was followed by successful appraisal wells, Kharir-2 and Kharir-3, both in 1993.
Atuf North West Field Discovery 1993, in May 1993, the Atuf Northwest-1 well, tested 4,867 b/d of 34° API crude.
Wadi Taribah Field Discovery 1995, in August 1995, Total drilled the well Wadi Taribah-1 which flowed at 1,459 b/d of 36° API crude.
Jathma Field Discovery 2006, in late 2005, the well Jathma-1, tested oil at over 1,900 b/d.
Production from the East Shabwah Block began on 18 December 1997 from the Kharir field. The two other discoveries – Atuf and Wadi Taribah – were brought to production in 1998.

Oil has been discovered in the Block (10), with over 90% coming from the Cretaceous Qishn Formation and the Fractured Basement Reservoirs.
First production from the Basement of the Kharir field began in July 2003.

Production in the East Shabwah Block peaked at 74,000 b/d in 2011.

The Block contains 4 oil fields.

The main reservoirs in the block:
- Qishn Formation Sandstones,
- Saar Formation Carbonate & Sandstones,
- Fractured Basement reservoir.

Main Seismic Work:
- Total 2D
- Total 3D
161 wells were drilled in the block.

Block (10) Facilities:
- Central Processing Unit (CPU), capacity 30,000 barrels oil per day, 60,000 barrels water per day, 12 million cubic feet/day of gas;
- Basement Processing Unit (BPU), capacity 30,000 barrels oil per day, 6,000 barrels water per day, 7.5 million cubic feet/day of gas;
- Central Compression Unit (CCU) for utilizing associated gas for power generation;
- Kharir Power Plant (KPP) has a 40MW capacity.

The oils in Block (10) fields have (28°-36° API) gravity for the main Qishn reservoirs, light oil in the basement rocks with (41° API).

The fields are connected with the main crude oil export pipeline of Block 14 by a 46-km, 10-inch 45,000 b/d capacity pipeline allowing the transportation of crude oil to the Ash Shihr export terminal on the Gulf of Aden.
In November 2009, started supplying gas to a Gas-Power Generation Plant on Block 10.

Malik Block (9)

Malik Block (9) located in the central part of Yemen on the western margin of the (Sayun-Masila) Basin, With an area of (2,227) Km². It lies immediately west of the productive Masila Block 14 fields.

The Block was awarded to Calvalley Petroleum on 3 April 1997.

At the end of 1995 British Gas drilled the Hiswah-1 well, the well flowed oil at a rate of 163 b/d from Sarr/Naifa Carbonates.
The Hiswah-2 well the first discovery made by Calvalley on Block 9 in June, 2002. The limestones reservoir between 1,152 – 1,239 meters flowed oil at a rate of 500 b/d from Sarr/Naifa Carbonates.
In July, 2002, Auqban-1 discovered oil in the Shuqra formation. During testing, the well flowed 35.9° API oil at rate 414 b/d and 0.065 mmscf/d.
In September, 2006, Ras Nowmah-1 encountered a 35 meter oil column and a 10 meter oil column in the Qishn and Saar formations respectively.
Qarn Qaymah-1 tested 9.71 mmcfd of gas and 650 b/d of condensate in the Kohlan sands and fractured basement.

The Malik Block was declared commercial on August 28^th 2005.

On December 13^th 2005, the Hiswah field started production at a rate of 2,000 b/d.
In January 2010, the Al Roidhat field started production.
In July 2011, the Al Ras – Na’wmah field started production.

The Block contains 4 oil fields.

Production in the Malik Block peaked at 5,397 b/d in January 2007.

The main reservoirs in the block:
- Qishn Formation Sand/Sandstones,
- Sarr/Naifa Formation Carbonates,
- Shuqra Formation Carbonates,
- Fractured Basement reservoirs.

Main Seismic Works:
- British Gas 2D
- Calvalley 2D
- Calvalley 3D
81 wells were drilled in the block.

Block (9) Facilities:
- Central Processing Facility (CPF) with a capacity of 25,000 b/d.
- Ras Nowmah Processing Facility with a capacity of 4,200 b/d.
- Water injection system with a capacity of 11,700 b/d.
- CPF Gas Injection Facility with a capacity of 2.0 MMscf/d.

Hiswah Field produced 35-36° API oil from the Sarr/Naifa Carbonates. The oil produced has low Sulphur (0.4%).
Auqban Field produced 35.9° API oil from the Shuqra Carbonates. The oil produced has low Sulphur (0.5%).
Al Roidhat Field produced 15-17° API oil from the Qishn Clastics reservoir.
Ras Nowmah Field produced 29° API oil from the Qishn Clastics reservoir.
Qarn Qaymah-1 tested condensate with a gravity of between 45 to 54° API in the Kohlan sands and fractured basement.

Previously, the crude oil was being trucked to the receiving facilities on the Marib-AlJawf Block 18, which are operated by Safer Petroleum Exploration Company and are linked to the Ras Isa marine terminal on the Red Sea coast. Later, oil was being trucked from the Malik fields to facilities at Block 51 enabling crude produced to enter the Masila System allowing the transportation of crude oil to the Main Oil Line for export through the Ash Shihr Terminal on the Arabian Sea. Currently, oil is being trucked to facilities at Block 4 allowing the transportation of crude oil to the Main Oil Line for export through the Bir Ali (Al Nushaima) Terminal on the Gulf of Aden.

Jannah Block (5)

Jannah Block (5) located in Saba’tayn (Marib-Shabwa) Basin, With an area of (280) Km².
The Jannah Block was awarded to Total Company in January 1989 to act as the operator during the exploration phases, while the Jannah Hunt Oil Company and YICOM (Yemen Company for Investment in Oil and Minerals), would operate the development phase.
The five years Exploration activity on the Jannah Block consisted of a total of 2,495 kilometres of seismic and drilled seven exploration wells during this phase.
The first well, Jannah-1, was declared a discovery in January 1992. It tested both gas and condensate at rates of 12 mmcfd and 600 b/d respectively. The well also proved significant quantities of associated gas.
In August 1992, was announced the discovery of a major oil field proven by the Halewah-1 and -2 wells. These tested oil at rates of 4,250 b/d and 5,885 b/d respectively, two other commercial fields have been discovered on the Block, Dhahab (1993) and Al Nasr (1995). The Aser field, discovered in 1996.
The Block was declared commercial in October 1995.

100% of oil and condensate which have been discovered in the Block (5) coming from the Jurassic Alif Formation. Oil exploration continued with propose to discover HC from the fractured Basement and other secondary formations.

The Block contains 5 oil/condensate fields.

Production in the Jannah Block peaked at 65,262 b/d in 2001.

The main reservoirs in the block:
- Alif Formation Sand/Sandstones,
- Seen Formation Sand,
- Fractured Basement reservoir.

Main Seismic Work:
- Total/Jannah Hunt Oil 2D
85 wells were drilled in the block.

Block 5 Facilities Include:
- Halewah Central Processing Facility.
- Al-Nasr Facility.
- Dhahab Facility (KPP) has a 40MW capacity.

The block is connected with the main pipeline of block 18 (Marib) by 40 Km long, and 12″ Diameter of the pipeline allowing the transportation of Crude through the Marib – Al Jawf fields to the Ras Issa export terminal on the Red Sea.

Ayadh Block (4)

Ayadh Block (4) located in in Saba’tayn (Marib-Shabwa) Basin, With area of (1,998) Km². It lies south of the productive Uqlah S2 fields and west of the productive Damis Block S1 fields.

In the 1980s, Russian company Technoexport commenced exploration on the 35,400 km² West Shabwah concession and discovered several fields. Block (4) was awarded to Nimir Petroleum on October 17^th 1991. On April 7^th 2008, the Block was awarded to the Korean National Oil Company (KNOC), in partnership with YICOM. Currently, the Block is operated by State-owned Company YICOM (Yemen Company for Investment in Oil and Minerals), YICOM has (100%) of shareholders.

In April 1987, Technoexport announced the discovery of three commercial oil fields in the Iyad Block. These fields are Amal, Iyad East and Iyad West.
The Iyad East-1 well the first discovery made by Technoexport on Block 4 in January, 1987. The reservoir flowed oil/condensate and gas from the Naifa, Madbi, Shuqra and Kohlan formations (Naifa best well tested 189 bopd and 3.5 mmscfpd, Shuqra tested 10.7 mmscfpd with 96 bcpd, Kohlan tasted 246 bopd).
In April, 1987, Iyad West-1 discovered oil. The reservoir flowed oil from Shuqra, Sabatayn and Naifa Carbonates (Sabatayn flowed 2,296 bopd in well#7).
In May, 1987, Amal-1 discovered oil in the Sabatayn, Madbi and Shuqra formations (Madbi tested at oil rates between 280 to 400 bopd).

In April 1987 the Iyadh Block declared commercial.

The first oil production from the Block was in 1987.

Production in the Iyadh Block peaked at 9,775 b/d in November 1992 by Nimir (8,500 b/d in October 1989 by Technoexport).

The main reservoirs in the block:
- Naifa Formation Carbonate rocks,
- Saba’tayn Formation Carbonate rocks,
- Upper Madbi / Lam Formation Limestones,
- Shuqra Fm. Dolomite and Limestone,
- Kohlan Formation Clastics,
- Basement fractured reservoir.

The block contains 3 fields.

Seismic Works:
- Technoexport 2D
- Nimir (NPC) 2D
- KNOCYL 2D
- KNOCYL 3D
94 wells were drilled in the Block.

Block (4) Facilities:
- 2 NATCO separators with capacity of 10,000 bbl. Another Separator with capacity of 10,000 bbls as spare.
- 3 Oil tanks with total capacity of 18,000 bbl.
- Chemical injection unit.
- 2 shipping pumps linked to MOPS via 19 km pipeline.
- TERMINAL – 5 oil Tanks (120,000 X 5 = 600,000 bbl). Submarine oil pipeline 3.5 km length.

The oils in Block (4) fields have (35°-50° API) gravity, viscosity of less than 1 cp at reservoir conditions.
Iyad West Field produced from the Shuqra, Sabatayn and Naifa Carbonates with an average 35° API oil. The oil has Sulphur (0.6%).
Iyad East Field produced up to 50° API oil/condensate from the Shuqra Carbonates.

In 1989, a pipeline (of 204 Km long, 20″ diameter, with maximum capacity of 140,000 BOPD) was completed allowing the transportation of crude from the Iyad fields to the Bir Ali / Rudhum export (Al Nushaima
Terminal) (maximum storage 630,000 barrel) on the coast in Shabwah province.