Production & Field Development
Crude and condensate production in 2015 averaged 50,600 bpd, up from 2014 production of 48,800 bpd. The black oil rate reached a high of 51,000 bpd in June 2015, with a yearly average of 46,200 bpd.
Several key projects were completed to improve oil and gas production, handling capacity, surveillance, and reduce downtime. These projects included:
- 399 workovers and acid stimulated 220 wells to improve productivity
- 9 high volume Electrical Submersible Pump installations to increase production
- Conversion of 7 wells to annular gas lift in order to increase production
- Opening 165 beam pump wells to the Casing Vapor Recovery (CVR) system to improve production
- Internally & externally coated tubing was run in beam pump wells and downhole chemical treatments began resulting in a decreased beam pump well tubing failure rate from 0.49 in 2014 to 0.43 by the end of 2015
- Seven Khuff well acid descaling jobs were completed which helped achieve an average NAG deliverability of 2.2 billion cubic feet per day (bcfd)
Oil operations successfully commissioned 65 new oil wells. These new wells contributed significantly to the production stabilization in 2015. At year-end, 1007 active oil and gas producers were on production.
Total Khuff gas production averaged 1.3 bcfd, with a peak production rate of 1.7 bcfd in August 2015.
Drilling & Subsurface Development
Tatweer drilled 62 new wells in 2015, bringing the total number of new wells to 845 since Tatweer commenced drilling operations in 2010. Performance and drilling efficiencies continued to be achieved with faster, cheaper and better wells being drilled. Drilling efficiency improvements included reduction in cost per foot, an increase in feet per day and overall reduced well drilling times.
Tatweer continued further technical and assessment work with the ongoing pilots. There were eleven pilots under evaluation by the end of 2015 – two steam floods, five water floods, three gas injection tests and high volume lift.
Operation of the promising forced imbibition steam process in the Rubble reservoir expansion was begun with drilling in 2 new areas for further appraisal. Utilizing steam injection, Tatweer produced the first Aruma extra heavy oil. The Mauddud light oil steam flood 5-acre pilot was completed in August 2015 after proving oil mobility through well tests, surveillance and core results.
Field Maintenance, Facilities Engineering, Major Projects, Construction and Commissioning
The maintenance programs aimed at enhancing the mechanical integrity, reliability and safety of field assets continued to ensure uninterrupted delivery of oil to the refinery and non-associated gas to the delivery points. Total maintenance man-hours worked during the year was just over 965,000 hours up from 650,000 from year 2014.
The Computerized Maintenance Management System – CMMS (Maximo) was updated to include all the new facilities. There are now approximately 152,000 assets/systems in Maximo.
There are just over 11,000 preventive maintenance activities in the system linked to nearly 800 standard job plans covering all the facilities. This will enhance the integrity, efficiency, safety and availability of equipment and facilities and will reduce downtime and costs.
Tatweer Petroleum commissioned three new associated gas compressor stations, adding 105 mmscfd of compression capacity and over 2,000 bpd of oil production.
Implementation of surface infrastructure to reduce gas interference in beam pump wells continued on work that began in 2014. 202 wells were connected to a casing vapor recovery network, which added around 1,000 bpd of oil production in December 2015.
Piping optimization projects were completed which reduced back pressure on wells and increased oil production several hundred barrels per day.
105 beam pump wells were connected to Electricity and Water Authority (EWA) power eliminating costly rental generation. The total number of Beam Pumping Unit (BPU) generators that have been phased out is now 468. Permanent power supplies were also installed for 8 Electric Submersible Pump (ESP) wells, 3 new gas compression stations and to 25 gas lift choke systems.