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  Geotechnical Site Investigations of Akçakoca Natural Gas Exploration & Production Projects of TPAO


Name of Project

TPAO Akçakoca Geotechnical Site Investigations

Place of Project

Akçakoca – Düzce / TÜRKİYE (Western Black Sea)

Working Dates

August 7, 2007 – August 28, 2007

Organizations Involved

§ TPAO Turkish Petroleum Corporation (Employer)

§ GEOS Geoteknik ve Sondajcılık Ltd.

§ ENAR Mühendislik, Mimarlık ve Danışmanlık Ltd.

§ AY-ER Harita, İnşaat, Bilgisayar, Turizm, İth., İhr., San. ve Tic. Ltd.

§ İstanbul Denizcilik ve Sörvey Hizmetleri

§ ITU Istanbul Technical University, Faculty of Civil Engineering, Soil Mechanics Laboratory

Scope of Works

This project was carried out with the cooperation of GEOS and ENAR and the following operations were carried out:

§ .Geotechnical site investigations were done until the depth of 120 m below seabed at predetermined locations in order to obtain geotechnical data and laboratory analyses of the soil samples were carried out.

§ .Geotechnical investigation was performed for gathering required data for the design of Akçakoca Offshore Platform to be constructed at 95 m depth.

§ .Soil samples were taken at every 3 m interval by drilling pipes and sent to the Soil Mechanics Laboratory of ITU Faculty of Civil Engineering to be analyzed.

§ .The drilling operations were finished on 14th of August.

§ .Drilling operations were conducted on our flat barge Seka Ak-2 having 5 mooring anchors. Tugboats Reis-6 and Vega 3 were also used in the operations.

§ .Seka Ak-2 was located 14 km away from the shore, accurately and bathymetric map of the site was prepared.

§ .Shell and auger boring and rotary boring methods were applied.

§ .After completing the site investigations and laboratory analyses, a detailed Geotechnical Report including following items was presented on 28th of August:

®       General geological structure of the area & that of the investigation site

®       Soil condition of the site

®       Lithological-Geotechnical properties of soil layers

®       Soil parameters

®       Pile diameter and length

®       Seismicity of the site

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