* Oil output at ACG was 663,200 bpd in Jan-Sept 2013
* Gas output at Shah Deniz rose to 7.3 billion bcm
TBILISI, Nov 14 (Reuters) - Oil output at BP-led oilfieldsin Azerbaijan in January through September declined slightlyfrom a year earlier, and gas output from the Shah Deniz fieldrose, BP-Azerbaijan said on Thursday.
Falling oil production at the Azeri-Chirag-Guneshli (ACG)oilfields, which account for most of Azerbaijan's output, hasraised concern in the ex-Soviet republic and prompted PresidentIlham Aliyev to accuse BP of making "false promises".
Oil output at the ACG declined slightly to 663,200 barrelsper day (bpd), from 684,000 bpd in the same period last year.
BP's output at ACG fell to 32.9 million tonnes in 2012, from35.4 million tonnes in 2011, but BP and its partner, stateenergy firm SOCAR, have been saying for much of this year thatproduction has now stabilised.
Oil output at ACG in the first three quarters of this yearwas 24.5 million tonnes, in line with the consortium's Mayprediction that total output for the year will be 33 milliontonnes.
Azerbaijan has said its total oil and condensate productionin the first nine months of 2013 was 32.5 million tonnes, down0.9 percent year-on-year.
The country expects to produce 41-43 million tonnes of oilin 2013 in comparison with 42.98 million tonnes produced lastyear.
GAS OUTPUT UP
Natural gas output from the Shah Deniz offshore fields inAzerbaijan rose to 7.3 billion cubic metres (bcm) in the firstthree quarters of 2013 from 5.2 bcm in the same period lastyear.
Shah Deniz is being developed by partners BP, Statoil, SOCAR, Total and others.
It is estimated to contain 1.2 trillion cubic metres (tcm)of gas, and Khoshbakht Yusifzade, SOCAR's first vice president,told reporters earlier this year that its reserves could reachat least 1.5 tcm based on recent calculations.
Shah Deniz I has been pumping gas since 2006, while gas fromits second stage is expected to reach Europe by 2019.
Overall gas production in Azerbaijan rose to 13.1 bcm inJanuary-September 2013, from 12.8 bcm in the same period lastyear.
SOCAR expects production to rise to 28-29 bcm this year from26.8 bcm in 2012.
Azerbaijan ships its oil via five main routes: Russia'sBlack Sea port of Novorossiisk, neighbouring Georgia's Supsa,Batumi and Kulevi ports, and Turkey's Ceyhan.
It sells gas to the domestic market and to Georgia andTurkey via the Baku-Tbilisi-Erzurum pipeline as well as toRussia.