Production & Field Development
Crude and condensate production averaged 48,500 bpd, down from 2015 production of 50,600 bpd. The black oil rate reached a high of 48,600 bpd in January 2016, and averaged 44,400 bpd for the year. End of year black oil production exceeded the set target by approximately 1,200 bpd.
Several key projects including 350 workovers and 240 stimulation treatments were completed to improve oil and gas production, handle capacity, surveillance, and to reduce downtime.
Oil operations successfully commissioned 38 new oil wells, which contributed to production stabilization in 2016. At year-end, 1,076 active oil and gas producers were on production.
Total Khuff gas production averaged 1,300 MMSCFD, with a peak production rate of 1,800 MMSCFD in July.
Maintenance programs were aimed at enhancing the mechanical integrity, reliability, and safety of field assets to ensure uninterrupted delivery of oil to the refinery and non-associated gas to delivery points.
The total maintenance man-hours worked during 2016 was just over 958,000 hours.
Tatweer Petroleum drilled a total of 38 new wells in 2016, targeting the cretaceous Ahmadi and Mauddud reservoirs, which brings the total number of new wells since Tatweer commenced drilling operations in 2010 to 883.
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.
Tatweer continued further technical and assessment work with ongoing pilot projects. In 2016, all pilot phases were sufficiently matured for close out, and pilots that showed encouraging results were moved to more expanded appraisal projects. A total of 11 appraisal projects were under evaluation by the end of 2016, including 2 steam floods, 5 water floods, and 3 gas injection tests and 1 high volume lift.
Operation of the heavy oil forced-imbibition steam injection process in the Rubble reservoir expansion commenced by adding 2 more patterns for further appraisal. 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.
Enhancements to the Mauddud and Ahmadi waterflood projects continued. Preliminary results of gas injection pilots in the Ahmadi and Arab gas injection optimization trial were positive. Reverse gas lift techniques and installation of Electric Submersible Pumps (ESPs) have successfully increased oil production significantly.
As part of the NAG Long Term Field Development, 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). Construction work started in June 2016, and the overall project progress by year end 2016 reached 63%.
Upgrading the control systems at 10 remote oil well manifolds has been initiated. The project will achieve better surveillance and control from the Central Control Facility through fiber optic connectivity, thereby bringing the entire oil, water, and steam production into the high speed fiber optic network.