Разработка Кашаганского нефтяного месторождения

The Kashagan field is located in the Kazakhstan sector of the Caspian Sea and extends over a surface area of approximately 75 kilometers by 45 kilometers. The reservoir lies some 4,200 meters below the shallow waters of the northern part of the Caspian Sea.

The use of conventional drilling and production technologies, such as concrete structures or jacket platforms that rest on the seabed – is not possible due to the shallow water and cold winter climate of the northern part of the Caspian Sea. To ensure their protection from harsh winter conditions and pack ice movement, offshore facilities are being installed on artificial islands. There are two main types of island – small unmanned ‘drilling islands’ and larger manned ‘hub islands’.

The Kashagan Oil Field Development Project; consists of construction of artificial islands and ice protection barrier structures at the Northern Caspian Sea, Kazakhstan. The on-going Project started in May, 2001 and a total of 8 no. of artificial islands for oil drilling activities were completed until now. Ice protection structures consist of stronghold and barrier heads distributed around oil drilling islands (with dimensions of 90 m by 110 m and 160 m by 250 m) in order to protect the island from drifting ice ridges. These cofferdams consist of sheet piles and steel pipe piles with various dimensions were driven by vibro hammers and hydraulic drop hammers.

The construction site is located in an extremely sensitive environmental area designated as “Specially Protected Zone” where the water depths typically range from approximately 1.5 m to 6 m. The subsoil conditions at the construction site consist of fine sandy clay and silt marine sediments overlaying predominantly firm to stiff clay layers. Activities within this region are subject to stringent controls, therefore a strict HSE Program has been implemented in the construction works.

In the content of this on-going Project, the following works; consist of ~296,000 m² sheetpile and steel pipe pile driving works; 64,000 ton of tie-rod and waling beam installation works; have been successfully completed between 2001 to 2016.

Bautino Artificial Island Project Caspian Sea

The Artificial Islands Project; consists of construction of artificial islands and ice protection barrier structures at the Northern Caspian Sea, Kazakhstan. The Project started in May, 2001 and a total of eight artificial islands for oil drilling activities were completed until August, 2010. Ice protection structures consist of stronghold and barrier heads distributed around oil drilling islands (with dimensions of 90 m by 110 m to 160 m by 250 m) in order to protect the island from drifting ice ridges. These cofferdams consist of sheet piles and steel pipe piles with various dimensions were driven by vibro hammers and hydraulic drop hammers. The construction site is located in an extremely sensitive environmental area designated as “Specially Protected Zone” where the water depths typically range from approximately 1.5 m to 6 m. The subsoil conditions at the construction site consist of fine sandy clay and silt marine sediments overlaying predominantly firm to stiff clay layers. Activities within this region are subject to stringent controls, therefore a strict HSE Program is implemented in the construction works.

In the content of this on-going Project, the following works; consist of ~260,000 m² sheetpile and steel pipe pile driving works; 65,000 ton of tie-rod and waling beam installation works; have been successfully completed between 2001 to 2010;