Production & Field Development
Crude and condensate production averaged 44,200 bpd, and the black oil rate reached a high of 43,800 bpd in January 2017, and averaged 40,200 bpd for the year.
Several well intervention activities and key projects were completed to improve oil and gas production and surveillance and to reduce downtime. These projects included:
- Completing 366 Work-overs and acid stimulating 202 wells to improve productivity.
- Implementing new techniques and technologies to increase wells production.
- Conducting low pressure trials at several tank batteries to increase drawdown from shallow beam pumping wells.
- Continuing the installation of internally and externally coated tubing and downhole chemical treatments in beam pump wells.
A number of 66 new oil wells were successfully commissioned, which contributed to production stabilization in 2017.
Total Khuff gas production averaged 1,410 million standard cubic feet per day (MMSCFD), with a peak production rate of 1,780 MMSCFD in August.
Total maintenance man-hours worked during the year was 653,412 hours.
In addition to core activities like carrying out turn around and inspection (T&I), preventative maintenance jobs (PMs) and corrective work orders, the Field Maintenance Department was also involved in commissioning of new facilities.
Tatweer Petroleum drilled a total of 66 new wells in 2017, targeting the Ahmadi, Mauddud and Kharaib reservoirs, bringing the total number of new wells since Tatweer commenced drilling operations in 2010 to 949. The new wells drilled were all primary wells, which resulted in the production of an additional full year average of 1,884 BOPD.
Performance and drilling efficiencies continued to be achieved with faster, cost efficient, and better wells being drilled. Drilling efficiencies continued to improve with reduction in cost per foot, an increase in feet per day, and overall reduction in well drilling times.
Among other achievements, Tatweer continued further technical and assessment work with ongoing Rubble and Shallow Gas injection pilot projects. The Mauddud water flood pilot phases were sufficiently studied for close out. Preliminary results of gas injection pilots in the Ahmadi and Arab Gas Injection Optimization Trial were positive.
The second Mauddud LOSF pilot was executed in 2016 after proving oil mobility from the 5-acre pilot through well tests, surveillance, and core results. A 7-spot appraisal pattern was drilled to further assess the economic viability for LOSF in larger Mauddud areas. Post injection surveillance data acquisition is still ongoing.
Facilities Engineering & Construction
As part of the NAG Long Term Field Development (LTFD), work under the Engineering, Procurement and Construction (EPC) contract was awarded in September 2015 for the installation of a 500 MMSCFD Gas Dehydration Unit (GDU) – Train 1 and engineering was completed and construction work started in June 2016. The project is now in operational service and delivering on-specification gas to the network Phase 2 (Train 2 & 3 – 500 MMSCFD each) are currently nearing completion with target start up in 2021.
To enable an increase in oil production, the Associated Gas Stability Project was begun as a joint effort between Banagas and Tatweer with necessary headers and piping installed in Q3 2017 which resulted in better gas distribution, increased compression capability of 15 MMSCFD, and an associated increase of 200 BOPD.
A project was installed and commissioned in Q4 2017 to add 6 MMSCFD compression to evacuate gas from the casing of over 80 Beam Pumping Unit wells to improve production up to a maximum of 570 MBO.