Drilling and Subsurface Development
Tatweer Petroleum drilled a total of 3 new Khuff gas wells and 110 new oil wells in 2019, targeting the Rubble, Ostracod, Magwa, Ahmadi, Mauddud, and Kharaib reservoirs, bringing the total number of new wells drilled since Tatweer’s inception in 2010 to 1,137, including 10 Khuff gas wells. The new wells drilled in 2019 were all primary wells, which resulted in the production of an additional full year average of 3,900 BOPD.
Performance and drilling efficiencies continued to be achieved with faster, cost efficient, and better wells being drilled. Drilling efficiencies continued to improve, meeting the planned cost per foot and feet per day with reduction in Non-Productive Time (NPT) and overall reduction in well drilling times.
Tatweer Petroleum continued to further develop the reservoirs and successfully managed to reduce the decline of the Field. This was achieved by conducting many technical assessments and reservoir developments for several reservoirs in the Field with the increase in Rubble reservoir primary production by 240 BOPD through 4 new horizontal wells in the light oil region. The Company achieved an additional 1,500 BOPD from 8 wells after the planning and execution of the Future Production Enhancement Scheme – Ostracod-Magwa Risk Reward project. 69 new Mauddud infill producers were drilled in the gas injection area in 2019 with closer spacing as part of the Mauddud Tight Spacing Program.
Facilities Engineering and Construction
As part of the Non-Associated Gas (NAG) Long Term Field Development plan, a 500 MMSCFD Gas Dehydration Unit (GDU), associated pipelines, and well head facilities were installed in 2018. Design dehydration rates of 500 MMSCFD were achieved in 2019 and the unit is running smoothly as various unit operations continue to be optimized.
The Arab Gas Compression project was completed and started up in 2019. It is currently operational and provides incremental 25 MMSCFD gas compression as designed.
An additional 50 beam pump wells were connected to the 11 KV network, bringing the total number of phased-out beam pump rental diesel generators (converted to permanent power) to 640 by the end of 2019.
An incremental 16 GDUs and 56 BPUs were connected to the fiber optic backbone in 2019. 15 Gas Lift wells, 7 legacy Well Manifolds and 3 Khuff wells were completed and hooked by the end of 2019. The fiber network expansion, which was initiated in the northern region, was completed in addition to extensive fiber network infrastructure upgrades throughout the Bahrain Field.
To support the Umm Al Naasan (UAN) exploration project, fast track civil projects were completed to support the drilling and fracking program regarding water supply and waste handling.
The 2019 well development program added 107 new wells to the Bahrain Field that consists of 80 gas lift wells and 27 BPUs. These wells are currently producing from Ahmadi, Bahrain, and Kharaib Reservoirs. There were also 20 existing well production conversions that also contributed to the oil gain in 2019.
To support the Company’s goals in renewable energy, a 3 MW Solar Power Plant was commissioned in 2019 and it has started delivering power to Tatweer’s 33 KV grid network. Several energy conservation, emissions compliance, and facility optimization projects were initiated in 2019.
Multiple infrastructure projects were also completed including a new health clinic building, laboratory building, waste management sump, and Headquarters porta cabins.
In its continuous efforts to find additional hydrocarbon resources onshore and offshore in the Kingdom of Bahrain, the Exploration department undertook a number of major projects in alignment with the exploration strategy of 2019. These projects aimed to:
- find and appraise new hydrocarbon resources;
- attract international oil companies and financial investment firms to partake in the exploration activities; and
- appraise the recent discoveries of Khalij Al Bahrain Basin (KAB) and Pre-Unayzah Gas.
The highlights of the exploration projects of 2019 are as follows:
- The first onshore appraisal well was drilled on Umm Al Nasaan Island in December 2018 following the announced discovery of KAB. The production test began in July 2019 and the well is still being tested, and the flowback data is under evaluation.
- In order to meet the increasing demand for gas, it was decided to produce the Pre-Unayzah formations Jubah and Jauf. The drilling of two Jauf wells commenced in October and November 2019.
- The promotion campaign for the remaining open offshore blocks along with the KAB opportunity was continued. Many in-house data-rooms were conducted throughout the year; hosting international oil companies and investment firms from the United States, Europe and Asia. An Exploration and Production Sharing Agreement (EPSA) was signed with ENI for Block-1 in May 2019.
- The Exploration department successfully completed the acquisition of a regional 2D geophysical survey in September 2019, covering offshore and onshore Bahrain. The interpretation of the newly acquired data and the integration with existing and vintage datasets will add value to the exploration offshore blocks and will help identify new exploration leads and prospects.