Hydrogeology studies and engineering design to support detailed design and EPCM of a 1,800 km buried pipeline transporting natural gas from Georgia, across Turkey to Greece.
The Situation
The Trans Anatolian Natural Gas Pipeline (TANAP) project is a world scale pipeline project that will deliver natural gas from the Shah Deniz gas field of Azerbaijan to end users in Europe including offtakes in Turkey.
WorleyParsons was awarded an Engineering, Procurement and Construction Management (EPCM) contract for a substantial portion of the TANAP project that will deliver 16 billion cubic metres per annum (bcma) of natural gas to the Trans-Adriatic Pipeline (TAP) by 2019. It will consist of a 56” and 48” diameter onshore pipeline system approximately 1,800 km in length, with an approximate 20 km offshore section beneath the Marmara Sea comprised of two parallel 36” diameter pipelines.
The pipeline includes five manned metering and compressor stations requiring water supply and wastewater disposal.
Our Approach
Advisian was engaged to deliver hydrogeology studies and engineering design to support the detailed design of the above ground installations and EPCM of the TANAP project.
Advisian undertook water resource assessments for the above ground installations to ensure that they have a secure potable water supply. Groundwater, municipal and surface water supply options were evaluated and supported by field investigations (pumping tests and water quality sampling).
Groundwater supply was identified as suitable and sustainable for three stations and potable water treatment systems designed for the anticipated water quality. Cost benefit and sustainability measures identified municipal supply and trucked water as suitable for the other two stations. Hydraulic analysis for the pipe distribution, borehole and pump design was subsequently completed to allow contractor procurement. Wastewater treatment technology review and system specification were developed for detailed design. A common approach was developed using membrane bioreactor (MBR) treatment, to allow ease of operation and maintenance of the system.
Selection, review and design of the potable and waste water systems were subsequently completed based on the findings of the water resource assessment. Wastewater technologies, discharge routing and environmental impacts from effluent discharge were assessed.
Results
The assessment defined the water use, flows, water quality characteristics and wastewater discharges and developed quantitative water balances for individual and combined operations. Our consultancy services led to the development of FEED system design for the potable and waste water systems.
