(Adds amount of transaction)
By Humeyra Pamuk
ISTANBUL, May 30 (Reuters) - Turkey's state oil company TPAO signed a $1.5 billion deal on Friday to acquire French energy company Total's 10 percent stake in Azerbaijan's Shah Deniz gas project, at a signing ceremony in Istanbul.
The agreement increases TPAO's stake in the project to 19 percent from a previous 9 percent, while Total exits the project. Sources had told Reuters about the sale in February.
The deal is worth $1.5 billion, Total said in a statement, and on completion will bring to $16 billion the assets sold by Total since 2012, in line with its asset-sale target of $15-20 billion by end-2014.
Turkish pipeline firm Botas also signed an agreement at the ceremony with Azeri state oil company SOCAR to raise its stake in the Trans-Anatolian natural gas pipeline project (TANAP) to 30 percent from 20 percent.
Azerbaijan's biggest gas field, Shah Deniz is being developed by consortium partners BP, Statoil, SOCAR and others.
Shah Deniz I has been pumping gas since 2006 and has an annual production capacity of about 10 billion cubic metres (bcm) of natural gas.
The next phase, Shah Deniz II, is important for Europe as an alternative to gas from Russia's Gazprom. It is expected to produce 16 bcm of gas per year from around 2019, with 10 bcm earmarked for Europe and 6 bcm for Turkey.
Socar President Rovnag Abdullayev said that this share would not be affected by the change in ownership.
The TANAP pipeline will run from the Turkish-Georgian border to Turkey's borders with Bulgaria and Greece. The preliminary cost has been estimated at $20 billion.
Turkish Energy Minister Taner Yildiz has said construction is expected to be completed by the end of 2018 in order to start deliveries of gas from Shah Deniz II in 2019. (Additional reporting by Michel Rose in Paris; Writing by Nick Tattersall; Editing by Dasha Afanasieva and Susan Thomas)