Page 36 - Tatweer AR 2022

36 Tatweer Petroleum | Annual Report 2022 www.tatweerpetroleum.com
Exploration and Field Development continued
 Completed Arab reservoir Field Development Study Stage 2 Phase I (EOR Fluid Analysis Lab Experiments) by DeMac.
 StartedtheArabDeMacStudyStage2Phase 2 (core flooding and asphaltene precipitation evaluation lab tests) in October 2022.
Khuff/Unayzah Gas Reservoirs
 Ten (10) wells were drilled to secure gas demand for summer 2023. Five (5) wells were perforated in Unayzah, where four (4) of them showed good potential (additional 75 MMSCFD to gas production). Moreover, ten (10) wells that were drilled in late 2021/ early 2022 were completed in Khuff.
 Planned drilling one (1) more Khuff well to meet the 2024 summer demand.
 Intotal,three(3)Workoverswereimplemented.
 Ten (10) Coiled tubing interventions (De-scale/ Acidize/others) were completed to maintain and improve total system capacity of NAG.
 Performed ten (10) Production Logging Tool (PLT) logging jobs to update the production allocation and fifty-two (52) pressure surveys to monitor reservoir pressure.
2. Well Development Program
In 2022, seventy-seven (77) new wells were added to the Bahrain Field. These wells were completed targeting Rubble, Ahmadi, Bahrain, OST/MAG, Fadhili, Mauddud, Kharaib and Khuff Reservoirs. In addition, there were (28) existing well production conversions GL to BPU, BPU to GL (20 wells), RGL to GL (6 wells). There were also twenty-four (24) existing well production conversions to GI wells, which included MGI, AGI and SGI wells that also contributed to the oil gain in 2022.
3. Production Enhancements
 Completion of six hundred fifty-three (653) workovers and new completions, out of which eighteen (18) jobs were suspended, six (6) were related to exploration wells and three (3) Khuff completions. Four hundred ninety-eight (498) wells were stimulated.
 Executed two hundred fifteen (215) High Pressure High Rate Acid Fracturing Campaign for Ahmadi and OST/MAG and a small number in Rubble reservoirs.
 Executed seven (7) StimStixx acid gas stimulation technique for Mauddud wells to avoid high gas production post workover.
 Executed fifty (50) Frac jobs on OST/MAG, Ahmadi and Rubble wells.
 Conversionofsixty-eight(68)wellstodifferent Method of Production (MOP) and seventeen (17) conversion on zonal jobs. Total conversions is eighty five (85).
 Completed (37) Gas isolation jobs and (16) Water Shut off jobs for Kharaib, Mauddud, Ahmadi and OST/MAG wells.
 Continued installing coated tubing and downhole chemical treatments for beam pump wells. This reduced failure rate at around 0.20 in 2022 compared to previous years’ failure rates.
Gas Distribution
upplied 1,560 MMSCFD of uninterrupted gas to thirty-four (34) active gas customers in 2022. From a supply perspective, 79% was Khuff gas, whereas approximately 21% was residue gas. From a demand perspective, both the Electricity and Water Authority (EWA) and Aluminum Bahrain B.S.C. (Alba) consumed approximately 72% of the supplied gas.