142 70 2 17 3 JOURNAL OF THE JAPANESE ASSOCIATION FOR PETROLEUM TECHNOLOGY VOL. 70, NO. 2 March, 2005 ACG * ** Received January 7, 2005 ; accepted January 12, 2005 Present and Future Perspectives of the ACG Project in Azerbaijan Kenichi Naito Abstract The ACG Oil Field is situated offshore Azerbaijan, about 100-140 kilometers ESE of Baku, in water depth between 150 and 450 meters. The ACG megastructure is comprised of three culminations, namely the Deep Water Gunashli, Chirag and Azeri fi eld. On 12 December 1994, the Azeri Government awarded the Production Sharing Agreement PSA to the Azerbaijan International Operating Company AIOC. AIOC consists of nine international oil companies, including ITOCHU. The ACG PSA is for a period of thirty years and will expire in December, 2024. The ACG area is estimated to contain in excess of 5 billion barrels of recoverable reserves. The fi rst production from Chirag platform started in November 1997. The start-up of production in Central Azeri, East and West Azeri and Deep Water Gunashli will be phased in from the beginning of Q1 2005 to 2008 across 4 producing platforms, 3 in Azeri Phase 1 and Phase 2, and 1 in Deep Water Gunashli Phase 3. The structure of the giant ACG Oil Field is a WNW to ESE trending, steep-dipping thrusted anticline. The main ACG reservoir is composed of Pliocene large river dominated lacustrine delta sandstone named as Pereriv and Balakhany sandstones. Currently, AIOC has drilled 18 wells on the Chirag 1 platform, of which 14 are producing wells and 4 are water injection wells. The production from the Pereriv sandstone is over 140,000 b/d crude oil. Phase 1 and 2 developments have been in the execution stages since September 2001 and September 2002, respectively. Phase 3 development starts in September 2004 and the total ACG fi eld peak production rate is expected to exceed 1 million barrels a day. One of the export routes for such production will be the Baku-Tbilisi-Ceyhan BTC pipeline that is 1,768 kilometers in length and will be completed in early 2005. Key words ACG, Azerbaijan, Azeri, Chirag, Gunashli, BTC Copyright 1. 1972 * 16 10 26 16 This lecture was delivered at the 2004 JAPT Autumn Meeting held in Tokyo, Japan, October 26, 2004. ** Technical Department, ITOCHU Oil Exploration Co., Ltd. 2005 JAPT ACG 2. 2.1 ACG Azeri
143 Chirag 150 m Gunashli 432.4 km 2 PSA Apsheron Baku 100 140 km 1 ACG Azeri Chirag Gunashli BP SOCAR 10 BP Operator 34.14% Unocal 10.28% SOCAR 10.0% INPEX 10.0% Statoil 8.56% ExxonMobil 8.00% TPAO 6.75% Devon Energy 5.63% ITOCHU 3.92% Amerada Hess 2.72% 150 450 m Absheron Sill 4 mud volcano 150 m 450 m SOCAR PSA 1994 12 12 30 2024 12 11 10 ACG ACG NAOC Baku 200 km JAOC 1 ACG J. JAPANESE ASSOC. PETROL. TECHNOL. Vol. 70, No. 2 2005
144 アゼルバイジャン ACG プロジェクトの現状と未来 が発見できず 撤退しております また 石油開発鉱区 油 層 は 主 要 産 油 層 と な る Pereriv 層 と そ の 上 部 の とはその性格が異なりますが ACG 鉱区の原油搬出に Balakhany 層の砂岩層から成っています Pereriv 層はさ 重要な役割を持つ BTC パイプラインプロジェクト 後 らに上部から下部に向かって A E の 5 つの layer に 述 にも 3.4% の権益を所有しております 分割され 特に layer B と D が主要 layer となり この 2 2.2 油層状況 layer で 100 m 前後の層厚となります 鉱区内には南東から北西に向かって Azeri Chirag Gunashli の 3 つの構造があり Gunashli についてはそ の南東側のみが ACG 鉱区に含まれます 図 2 参照 Gunashli 構 造 の 北 西 側 は 水 深 が 150 m 以 浅 と 浅 く SOCAR が独自に開発し 1980 年より生産を行っており 油層の性質は以下の点が挙げられます Pliocene 鮮新世 の河川 デルタ成で 湖成堆積物 が油層を形成している 北西 南東系列の細長い背斜構造を基本とし 多くの 断層の存在が予想されている 断層により油層が compartment 化している可能性が ます 図 2 ACG 鉱区構造図および油層断面図 石油技術協会誌 70 巻 2 号 2005
145 30 40 4 mud volcano 1,800 3,300 m 5,000 psi@2,900 m 34 API GOR 900 1,000 scf/stb 2.3 ACG 1994 9 PSA 12 SOCAR 10% the Deal of the Century 3 1995 8 1997 7 2000 2 1996 3 McDermott 2.45% 7 Pennzoil 1.47% 3.92% ACG 40 km 5 km Phase 3 1997 Chirag EOP Early Oil Production 14 BPD Phase 1 Azeri Phase 2 Azeri 1 Azeri Phase 3 Gunashli Chirag ACG 3 ACG Phased Development J. JAPANESE ASSOC. PETROL. TECHNOL. Vol. 70, No. 2 2005
146 ACG Phase 1 2005 1 Phase 2 2006 4 Phase 3 2008 1 Chirag 14 BPD Phase 3 2008 2011 100 BPD 2024 54 bbl 3. 3.1 Chirag Chirag SOCAR PSA 3 1997 11 EOP Early Oil Production 24 Chirag 1 5,000 6,000 BPD 1997 1999 14 11 BPD 14 BPD 4 6.5 km 3 ERD Extended Reached Drilling 14 16.5 BPD 2005 5 1 18 19 2004 9 18 14 14.6 BPD 4 10 BPD 2.6 bbl Chirag 3.2 Azeri Phase 1 2 3.2.1 Azeri ACG Phase 1 2 Phase 1 Azeri 48 1 2 2004 3 8 10 2005 1 2005 3 Phase 2 Azeri 48 1 2 2006 2 2007 1 Azeri Azeri 3.2.2 Azeri Azeri 2002 3 1 12 2003 5 2 Azeri 70 2 2005
147 3.2.3 4 C Component Azeri 4 C 4 C OBC Ocean Bottom Cable 3.3 Gunashli Chirag Phase 3 Azeri ACG Phase Gunashli Chirag Phase 3 Phase 3 Phase 1 2 Gunashli Gunashi Gunashi SOCAR 1980 10 BPD Gunashli 48 1 Phase 3 8 ACG Phased development Azeri 2008 2 ACG Chirag 2005 2008 4 Azeri 3 Gunashli 1 2 100 BPD 4. ACG 4 4 ACG J. JAPANESE ASSOC. PETROL. TECHNOL. Vol. 70, No. 2 2005
148 ACG ACG Baku 50 km Sangachal Chirag 1997 Baku Novorossiysk 12 BPD 1998 3 Novorossiysk Baku Supsa 1998 12 1999 4 Supsa 15 BPD Baku BTC BTC 3 BTC Baku Tbilisi Ceyhan 100 BPD 2003 1,768 km 2005 2005 1 Phase 1 BTC BTC ACG ACG Wethington, Barry et al., 2002 : Development of a Super Giant, ACG Field, Offshore Azerbaijan: An Overview. 2002 AAPG Annual Convention, Houston, Texas. 70 2 2005