Atrush Field

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Atrush Field
Iraq adm location map.svg
Red pog.svg
Location of Atrush Field
Country Iraq
Region Dohuk
Location Sheikan district
Offshore/onshoreOnshore
Coordinates 36°51′48″N43°27′1″E / 36.86333°N 43.45028°E / 36.86333; 43.45028 [1]
Operators TAQA (47.4%)
Partners Kurdistan Regional Government (25%) ShaMaran Petroleum Corp. (27.6%)
Field history
DiscoveryApril 13th 2011 [2]
Start of productionJuly 3rd, 2017 [3]
Production
Current production of oil45,000 barrels per day (~2.2×10^6 t/a)
Estimated oil in place296 million barrels (~4.04×10^7 t)
Recoverable oil102.7 million barrels (~1.401×10^7 t)
Producing formationsJurassic fractured carbonate [4]
TAQA's Atrush Field in the Kurdistan Region of Iraq ShaMaran's Atrush Field.jpg
TAQA's Atrush Field in the Kurdistan Region of Iraq

Atrush Field is a Jurassic fractured carbonate oilfield near Dohuk, Iraqi Kurdistan. It was discovered by the Consortium of General Exploration Partners. As of March 12, 2013, the Kurdistan Regional Government (KRG) has exercised its option to acquire a 25% Government Interest of the Atrush Field according to the PSC contract. [5]

Contents

General Exploration Partners (GEP) held 80% of Atrush and was in cooperation with Aspect Energy International, who owned 2/3 of GEP, thus Aspect Energy International had a share of 53,2%. Aspect Energy International sold its interest in GEP to TAQA for $600 mln, [6] which basically transferred Aspect's interest in GEP to TAQA. Shamaran's interest remained at 26,8% of Atrush, and the remaining 20% is held by Marathon Oil. [7]

In June, 2018 Shamaran Petroleum announced that it intends to purchase Marathon Petroleum's 15% share of the Atrush Block., [8] with effect from Jan 1, 2018. ShaMaran will acquire all shares of MOKDV - Marathon's Dutch subsidiary for US$63m. ShaMaran will then sell 7.5% working interest to Taqa for US$33m. The sale is expected to close in the first quarter of 2019. [9]

Oil began flowing through the Atrush Central Production Facility on July 3, 2017. [3] In September 2017, an agreement for the sale of Atrush oil was signed between TAQA, its partners and the KRG. Under the agreement, the KRG will buy oil exported from the Atrush field by pipeline at the Atrush block boundary. The quality of the oil will force a price adjustment of approximately $16/bbl lower than the dated Brent oil price. All local and international transportation costs will be an additional fee. This discount is based on the principles similar to other oil sales agreements in the Kurdistan Region of Iraq. [10]

Atrush Field Naming Conventions

In 2014 after a meeting of the Atrush Management Committee and the KRG Ministry of Natural Resources Archived 12 March 2016 at the Wayback Machine changes in terminology used with respect to activity in the Atrush Field were made: [11]

Wells

Atrush-1 (AT-1) Well

Atrush-1 (AT-1) well was successfully spudded on October 5, 2010. The well had a natural flow of 6,393 barrels of oil per day. General Exploration Partners discovered 726 meters of oil column and 120 meter netpay. The well has since been permanently abandoned [9] [2] [12]

Atrush-2 (AT-2) Well

Atrush-2 (AT-2) well was successfully spudded on May 23, 2012. The well had a flow of 42212 barrels of oil per day using a Submersible pump, [13] estimated to have been the highest flow ever in Iraqi Kurdistan. [14] The design of the DST Program, as well as the permanent completion, was managed by Daniel Riedel, Richard Sharpe, Damon Yarshenko, and Wes Whitman with key execution support provided by core contractors. AT-2 was completed for production in Q3 of 2016. [4]

Atrush-3 (AT-3) Well

Atrush-3 (AT-3) well was believed the well spudded on 26 March 2013 but there is no information confirming this for now. [5]

AT-3 Well Summary

  • In December 2018 the well was worked over as a heavy oil production well and is now ready for the heavy oil extended well test. [9]

Atrush-4 (AT-4) Well

Drilled in 2014, Atrush-4 (AT-4) well is the second well to be drilled in support of the Phase One Facility. [11]

AT-4 Well Summary

  • High-angle deviated well. 82° was the maximum hole angle. This demonstrated that the field could be developed, using directional wells in the face of extremely rugged terrain. [11]
  • The well was drilled from the AT-1 pad, which is correctly known as Chamanke-A. [11]
  • The Jurassic reservoir is approximately 72m higher than when it was encountered in AT-1. [11]
  • Two limited well tests were performed for fluid samples. [11]
  • The combined rate of fluid production was over 9,000 barrels (1,400 m3) of oil per day of 26°API oil. [11]
  • There wasn't an indication of a gas cap. [11]
  • An interference test was also conducted. The test demonstrated instantaneous pressure communication with AT-2. [11]
  • AT-4 was suspended as Phase One Facility producer. [11]
  • AT-4 was completed for production in Q3 of 2016. [4]
  • Clean-up attempts were made during 2018, but resulted in disappointing productivity the well is now awaiting work-over for a smaller pump. [9]

Chiya Khere-5 (CK-5) Well

Chiya Khere-5 (CK-5) well [11] was completed in Q3 of 2015. [4]

Chiya Khere-6 (CK-6) Well

Chiya Khere-6 (CK-6) Phase 2 appraisal well has a total depth of 2,105 metres. The TAQA-operated well reached TD on November 5, 2014, after 36 operational days. Part of the eastern part of the Atrush block the well is located on the Chamanke C pad. This pad is also the location of AT-3. CK-6 is a directional well, drilled in SSE direction from the surface. CK-6 encountered the Jurassic age reservoir at a higher elevation (≈139 metres) than the nearby AT-3 well. [15] As of January 2019 the well is awaiting a work over to become an observation well during the heavy oil extended well test of AT-3. [9]
The well was recompleted in February 2019 and came online for production in May 2019 at 4,500 barrels (720 m3) of oil per day. [16]

Well Testing

DST #1 [15]
  • Formation: Alan [15]
  • Perforated interval: 12 metres [15]
  • Using an Electric Submersible Pump (ESP) and nitrogen lift the heavy oil was produced at a low rate. [15]
  • The test interval was the deepest from which oil has been recovered. At -460 m below sea level, the CK-6 oil was found to be almost 200 m deeper than the oil recovered from the equivalent reservoir in well AT-2. [15]
  • The viscosity of the recovered oil was lower than the oil from AT-2. [15]

Chiya Khere-7 (CK-7) Well

Chiya Khere-7 (CK-7) appraisal and development well drilling operations commenced prior to September 19, 2017. CK-7 is located in the central area of the Atrush Block. The producing well, AT-2, is approximately 3 kilometres to the east, while AT-3 is 3.5 kilometres to the west. The well is most likely being drilled from the Chamanke E pad. The objectives are to add another producing well by appraising the Mus formation's commercial potential and to reduce the uncertainty in determining the depth of the medium to the heavy oil transition zone. The well is expected to reach the 1,575 metre Total Depth within 52 days, using the Romfor 25 drilling rig. [17]

Chiya Khere-8 (CK-8) Well

Chiya Khere-8 (CK-8) well [11] was completed in Q3 of 2015 [4]

Chiya Khere-9 (CK-9) Well

Chiya Khere-9 (CK-9) water disposal well, was drilled successfully as planned and is ready for water injection. [9]

Chiya Khere-10 (CK-10) Well

Chiya Khere-10 (CK-10) well was drilled in June 2018 [18] and tied into the facility in July 2018. [19]

Chiya Khere-11 (CK-11) Well

Chiya Khere-11 (CK-11) is a deviated infill production well, located on the Chamanke-G pad, that was spud on 3 January 2019, the Sargelu formation is the target. [9]
The well was drilled to its final depth by mid-March, came online for production on May 10, 2019, produced at 5,500 barrels (870 m3) of oil per day (during July 2019) [20] and increased to 8,500 barrels (1,350 m3) of oil per day in September 2019. [21]

Chiya Khere-12 (CK-12) Well

Chiya Khere-12 (CK-12) is a 2,400 metre deviated infill production well, located on the Chamanke-E pad [21] that was spud in 2019, the well was brought on production on August 10, 2019. [22]
CK-12 was drilled to its final depth at the end of May 19, 2019, where the reservoir was found to be 25 metres deeper than the prognosis indicated. CK-12 well was left cased and suspended until a workover rig was used to complete CK-12 in July 2019. Production commenced on August 10, 2019. CK-12 is currently producing at a rate of 2,000 barrels (320 m3) of oil per day from the Mus Formation. [21]

Chiya Khere-13 (CK-13) Well

Chiya Khere-13 (CK-13) located on Chamanke-E, is a 2,340m deviated infill production well that was spud in June 2019, [20] drilled to TD by August 19, 2019, and brought on production on September 18, 2019, at a rate of 6,000 barrels (950 m3) of oil per day. This well encountered the target Formation at 23 metres lower than expected depth. [21] The failure by TAQA's development geologist, well operation geologist and the geological manager to accurately forecast formation depths is rumoured to be a sore point within the partnership.

Chiya Khere-14 (CK-14) Well

No mention of CK-14 has ever been publicly announced.

Chiya Khere-15 (CK-15) Well

Chiya Khere-15 (CK-15) is a deviated infill production well at the Chamanke-G drilling location. The well was spudded on October 5, 2019, and came online on December 8, 2019. [21]

Heavy Oil Extended Well Test (HOEWT)

During 2018 the operator installed heavy oil well testing equipment. The equipment will provide 5,000 barrels (790 m3) of oil per day additional processing capacity at the Chamanke C pad, where AT-3 is located. Heavy oil production to should begin in February 2019. [9]
In fact, the HOEWT was delayed until mid-April., [20] the well was brought on production in Q3 2019. [22]

Chiya Khere-16 (CK-16) Well

CK-16, a water disposal well, supplements well CK-9. [23] The well reached TD on May 20, 2022, [24] and was completed over the Sarki reservoir in July 2022 and water disposal also commenced in July 2022 [25]

Chiya Khere-17 (CK-17) Well

The drilling and completion, on time and under budget, of a side-track CK-17 well (from Pad A) to recover from the upper Jurassic Sargelu reservoir was spud on April 1, 2021. [26] In July 2022 the well underwent a workover operation to increase production. It was expected to be completed by August 2022. [27]

Chiya Khere-18 (CK-18) Well

According to a post on Linkedin.com by TAQA's Drilling and Completions Manager during the week of September 6, 2022, CK-18 (Pad G) successfully reached TD as the first horizontal well in the Atrush block. The manager also stated that the horizontal drain length was 1016 metres. The Atrush production well CK-18 , spudded from the Chamanke G Pad, was drilled to total depth in September 2022 with a 950m section drilled horizontally through the Lower Jurassic Mus formation. The well is currently being sidetracked and is expected to be recompleted during 2023. [28]

Chiya Khere-19 (CK-19) Well

In October 2022 the Atrush production well, CK-19, was spudded from the Chamanke C Pad. Targeting the Upper Jurassic Sargelu formation, the well is forecast to commence production in Q1 2023. [28]

Chiya Khere-20 (CK-20) Well

The CK-20 production well was drilled from the Chamanke E Pad in February 2023. The well was drilled to a total depth of 1,753m and completed over the Upper Jurassic in April 2023. [29]

Future wells

Drill and complete additional production wells. [30] One of the wells is to be drilled from the Chamanke-A pad several hundred meters to the west of AT-1. The other to be drilled from Chamanke-G pad landing south east of AT-1 and south west of CK-5.The well from Chamanke-A indicated that plans to build Chamanke-D pad to the west of Chamanke-A have been scrapped. This is reportedly due to the inability of the TAQA land negotiation team to secure the property and the incompetence of the facilities construction team to build a pad before 2024. There was speculation that these wells will not be drilled in 2021 or 2022 as TAQA reportedly dismissed their operations geologist, whose presence would be mandatory during drilling. This speculation proved to be false with the drilling of 2 wells in 2022. In fact Atrush capital expenditures for 2022 planned at $116 million ($32 million net to ShaMaran). This capital program includes drilling and completing three development wells, including one water injection well. [31]

Producing Wells

There are a total of eleven producing wells: Atrush-2, (“AT-2”) Chiya Khere-5 (“CK-5”), Chiya Khere-7 (“CK-7”), Chiya Khere-8 (“CK-8”) and Chiya Khere-10 (“CK-10”). [32] In 2019, Chiya Khere-6 (“CK-6”), Chiya Khere-11 (“CK-11”), Chiya Khere-12 ("CK-12"), and Chiya Khere-13 ("CK-13") have also been added as production wells. [22] In December 2019, Chiya Khere-15 ("CK-15") was also listed as a production well. [33] Well CK-17 has been added as a production well. Atrush production well CK-18, in September 2022. In October 2022 the Atrush production well, CK-19 was spud. [31]

Wells Pads

Facilities

A 30,000 barrels (4,800 m3) of oil per day Phase 1 facilities has been completed. [34] As of September 29, 2017, the facility has achieved a regular daily export of more than 22,000 barrels (3,500 m3) of oil equivalent. [10] Facility production is expected to increase to 30,000 barrels (4,800 m3) of oil equivalent per day during 2017. [10]
In June 2018 Shamaran Petroleum reported a partial blockage of the production facility's heat exchanger. Sediment samples were analyzed and it was determined that the blockage was caused by salt. The most probable source of the salt might be drilling fluid losses from the drilling of CK-5 and AT-2. The heat exchanger was cleaned. A trial process of injecting freshwater at the CK-5 wellhead and separating saltwater out at the production facility's separator have significantly reduced the quantity of salt in the crude to be processed for export.
As of June 2018, approximately 20,000 barrels (3,200 m3) of oil per day of processed oil is being exported. Water injection at the wellhead will continue while gradually increasing production as the field personnel closely monitor the facility. Water injection is limited due to the small daily disposal capacity, once the CK-9 water disposal well is completed in the second half of 2018, the capacity will increase. [35] The average daily production for 2018 was about 22,200 barrels (3,530 m3) of oil per day, the rate at the end of December 2018, was 27,500 barrels (4,370 m3) of oil per day. [9]
During 2019, debottlenecking the 30,000 barrels (4,800 m3) of oil per day facility will occur. [9]

Average production for November 2019 was 43,360 barrels (6,894 m3) of oil per day. [16]

An Early Production Facility (EPF) was installed at the Chamanke E pad in Q3 2019. The EPF has a capacity of 10,000 bbl per day. [36]

Pipeline

Monthly Production Data

Monthly Production Data [9]
DateVolume (bbl/d)Volume (m3/d)Comment
July 20174,800760
August 201718,3002,910
September 201721,4003,400
October 201713,3002,110Facility shut down to address production constraints
November 201725,4004,040
December 201726,3004,180
January 201826,6004,230
February 201823,9003,800
March 201820,2003,210Back-produced salt plugs facilities
April 201811,9001,890
May 201815,1002,400
June 201820,1003,200
July 201819,1003,040Shut down to tie-in CK-7, CK-10
August 201821,4003,400Frequent pipeline outages
September 201824,5003,900Flushed stripper column
October 201826,8004,260
November 201828,2004,480
December 201827,5004,370CK-10 ESP failure
January 201926,9004,280
February 201923,5003,7407day Export Pipeline Shutdown
March 201928,1004,470
April 201929,0004,600
May 201928,6004,550Reboiler Flushing and CK-8 ESP Failure
June 201927,1004,310CK-8 ESP Replacement
July 201933,9005,390 [37] CK-8 ESP Online
August 201935,3005,610 [38] CK-12 Online
September 201930,2854,815
October 201938,0406,048 [39]
November 201943,3606,894 [40]
December 201943,4006,900
January 202047,8007,600
February 202045,7007,270
March 202046,1007,330
April 202046,8007,440
May 202046,5007,390
June 202047,0007,500
July 202047,0007,500
August 202046,1007,330
September 202044,9007,140
October 202043,6006,930
November 202039,8006,330
December 202038,7006,150
January 202137,6005,980
February 202137,7005,990
March 202139,1006,220
April 202142,1006,690
May 202141,9006,660
June 202134,5005,490
July 202142,1006,690
August 202141,4006,580
September 202140,1006,380
October 202137,8006,010
November 202128,0004,500
December 202139,7006,310
January 202238,4006,110
February 202239,0006,200
March 202239,0006,200
April 202239,9006,340
May 202238,5006,120
June 202237,1005,900
July 202236,5005,800

Pre-2019 numbers for barrels are rounded down to the nearest 100 barrels per day. [41]
2019 and forward data without specific citations were generated using software to evaluate published charts. These numbers are estimates and could be subject to change. [42]

Estimated Reserves (December 31, 2017)

PROVEDPROVEDTOTALPROBABLETOTAL PROVEDPOSSIBLETOTAL PROVED,
DEVELOPEDUNDEVELOPEDPROVED& PROBABLEPROBABLE & POSSIBLE
Light/Medium Oil (Mbbl)(1)
Gross(2)4,2113,0267,23712,38519,62212,02031,641
Net(3)2,9751,6734,6486,34710,9963,99914,995
Heavy Oil (Mbbl)(1)
Gross(2)-2822827451,0266851,711
Net(3)-181181394575236811

[43]

(1) The actual split between Light/Medium Oil and Heavy Oil is uncertain. [43]

(2) Based on the Shamaran's 20.1 percent share. [43]

(3) Based on Shmaran's share. [43]

Estimated Contingent Resources (December 31, 2017)

Contingent Resources [43]
Light & Medium Oil (MBBL)(3)Heavy Oil (MBBL)(3)Naural Gas (MMCF)
Contingent Resources(1)(2)GrossShamaran InterestGrossShamaran InterestGrossShamaran Interest
100%Gross(4)Net(5)100%Gross(4)Net(5)100%Gross(4)Net(5)
Low Estimate (1C)67,79613,627N/A106,68021,479N/A25,4775,121N/A
Best Estimate (2C)68,75613,820N/A227,41245,710N/A46,8959,426N/A
High Estimate (3C)76,60615,398N/A372,87574,948N/A73,47714,769N/A
Risked Best Estimate55,00411,056N/A181,93036,568N/A2,343471N/A

Map

Atrush Field from space with the block boundary in red, taken September 4, 2018, by the European Space Agency - ESA produced from ESA remote sensing data image processed by SNAP Desktop 6.0.3 Atrush Block.jpg
Atrush Field from space with the block boundary in red, taken September 4, 2018, by the European Space Agency - ESA produced from ESA remote sensing data image processed by SNAP Desktop 6.0.3

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References

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  6. ↑ "TAQA buys stake in Iraqi Kurdistan oil block for $600 mln". Reuters. 2 January 2013.
  7. ↑ "ShaMaran acquires Larger Stake in Atrush".
  8. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 12 June 2018. Retrieved 11 June 2018.{{cite web}}: CS1 maint: archived copy as title (link)
  9. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 "Archived copy" (PDF). Archived from the original (PDF) on 30 January 2019. Retrieved 30 January 2019.{{cite web}}: CS1 maint: archived copy as title (link)
  10. 1 2 3 "ShaMaran Petroleum Corp - press-releases". Archived from the original on 2 October 2017. Retrieved 3 October 2017.
  11. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 "Archived copy" (PDF). Archived from the original (PDF) on 22 December 2014. Retrieved 17 March 2016.{{cite web}}: CS1 maint: archived copy as title (link)
  12. ↑ "ShaMaran Petroleum Corp. - Atrush Block - Overview". Archived from the original on 3 March 2013. Retrieved 4 February 2013.
  13. ↑ "Reuters". Archived from the original on 16 February 2013. Retrieved 5 July 2021.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
  14. ↑ "ShaMaran strikes it rich at Atrush block". Oil & Gas Middle East.
  15. 1 2 3 4 5 6 7 "Taqa flows oil at CK-6 well in Kurdistan | Oil and Gas Technology".
  16. 1 2 "Shamaran atrush update" (PDF). shamaranpetroleum.com. 12 December 2019. Retrieved 28 August 2023.
  17. ↑ "ShaMaran Petroleum Corp - press-releases". Archived from the original on 20 September 2017. Retrieved 20 September 2017.
  18. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 31 January 2019. Retrieved 31 January 2019.{{cite web}}: CS1 maint: archived copy as title (link)
  19. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 31 January 2019. Retrieved 31 January 2019.{{cite web}}: CS1 maint: archived copy as title (link)
  20. 1 2 3 "Shamaran Second Quarter 2019 Update". ShaMaran Petroleum. Retrieved 12 December 2019.
  21. 1 2 3 4 5 "Q3 ShaMaran petroleum corp. Financial Report" (PDF). ShaMaran petroleum corp. Retrieved 12 December 2019.
  22. 1 2 3 "Welcome to ShaMaran Petroleum Corp. Website". ShaMaran Petroleum Corp.
  23. ↑ "Welcome to ShaMaran Petroleum Corp. Website".
  24. ↑ "Welcome to ShaMaran Petroleum Corp. Website".
  25. ↑ "Welcome to ShaMaran Petroleum Corp. Website".
  26. ↑ "Shamaran Second Quarter 2021 Update" (PDF). ShaMaran Petroleum. Retrieved 20 August 2021.
  27. ↑ "Shamaran Second Quarter 2022 Update" (PDF). ShaMaran Petroleum. Retrieved 3 November 2022.
  28. 1 2 "Welcome to ShaMaran Petroleum Corp. Website" (PDF).
  29. ↑ "Shamaran Second Quarter 2023 Update" (PDF). ShaMaran Petroleum. Retrieved 26 October 2023.
  30. ↑ "Pareto Securities' - 16th annual E&P Independents Conference" (PDF). ShaMaran Petroleum. Retrieved 20 August 2021.
  31. 1 2 "Welcome to ShaMaran Petroleum Corp. Website".
  32. ↑ "Welcome to ShaMaran Petroleum Corp. Website". ShaMaran Petroleum Corp.
  33. ↑ "ShaMaran Atrush Update. Website". ShaMaran Petroleum Corp.
  34. 1 2 3 "Archived copy" (PDF). Archived from the original (PDF) on 21 September 2017. Retrieved 20 September 2017.{{cite web}}: CS1 maint: archived copy as title (link)
  35. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 12 June 2018. Retrieved 11 June 2018.{{cite web}}: CS1 maint: archived copy as title (link)
  36. ↑ "Annual information form For the year ended December 31, 2021" (PDF). shamaranpetroleum.com. 25 April 2022. Retrieved 28 August 2023.
  37. ↑ "ShaMaran Petroleum Q2 results" (PDF). ShaMaran Petroleum. Retrieved 12 December 2019.
  38. ↑ "ShaMaran Corporate Presentation September 2019" (PDF). ShaMaran Petroleum. Retrieved 12 December 2019.
  39. ↑ "ShaMaran Petroleum Q3 results" (PDF). ShaMaran Petroleum. Retrieved 12 December 2019.
  40. ↑ "SHAMARAN ATRUSH UPDATE" (PDF). ShaMaran Petroleum. Retrieved 12 December 2019.
  41. ↑ "BOPD - Schlumberger Oilfield Glossary".
  42. ↑ "ShaMaran Town Hall Presentation April 2022" (PDF). ShaMaran Petroleum. Retrieved 3 November 2022.
  43. 1 2 3 4 5 "Shamaran Announces 25% Increase in Atrush Reserves Estimates" (Press release). 15 February 2018.
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