Angelin gas project is located offshore Trinidad and Tobago in 65m of water. Image courtesy of BP.
First gas from the Angelin gas project was achieved in February 2019. Image courtesy of McDermott, Inc.

The Angelin gas project is located offshore south-eastern coast of Trinidad and Tobago. It is developed by BP Trinidad and Tobago (BPTT, operator), a subsidiary of BP (70%) and Repsol (30%).

The project is BPTT’s 15th offshore gas development project in Trinidad. It was sanctioned by the company in June 2017 and was followed by a gas sales agreement signed between BPTT and the National Gas Company of Trinidad.

Construction work for the project was started in the third quarter of 2017, while drilling of the production wells was commenced in 2018 and first gas achieved in February 2019.

The project has a capacity to produce 600 million metric standard cubic feet of gas a day (Mmscfd).

Angelin gas project location, discovery, and reserves details

The Angelin gas project is located in the West block of the Columbus Basin, at a water depth of approximately 65m.

The field was discovered in 1995 with the drilling of the El Diablo well. The La Novia appraisal well was drilled in 2006 to appraise the field.

Angelin is estimated to hold 1.5 trillion cubic feet (tcf) of gas. BP deployed ocean bottom cable (OBC) seismic technology for the first time for exploring the reserves of the gas field.

Angelin gas project development details

The Angelin gas project is developed using a normally unmanned installation (NUI) facility with a capacity of 600 million metric standard cubic feet per day (Mmscfd) of gas or 109,000 barrels of oil-equivalent per day.

The NUI is installed with a four-deck topside weighing 1,323t and is integrated with a 992t four-legged main pile jacket. It is a six-slot wellhead-type platform featuring a 26.37in riser and two separate 26in tie-in flexible spools, one of which connects to the subsea wye of the existing Serrette facility and the other to a new wye skid at Angelin.

The construction work for the pile jacket and the topside was performed at the Altamira fabrication facility operated by McDermott in Mexico. The integration work for Alegin’s production facility began in August 2018.

The installation work was conducted by Derrick Lay Vessel (DLV)-2000 operated by McDermott. The vessel is an integrated heavy lift and pipe-lay vessel accompanied with a 2,000Mt crane.

The gas project also includes four production wells drilled to a water depth ranging between 2,500m and 4,000m.

Gas transmission details

The gas produced from the Angelin project is transported to the existing Serrette gas development facility operated by BPTT.

A 21km-long pipeline carries the gas produced from the Angelin facility to the Serratta gas hub, from where the gas is further transported to the nearby Cassia C compression platform for processing.

The processed gas is then exported to the onshore Atlantic liquefied natural gas (LNG) terminal located in Point Fortin, Trinidad and Tobago, in which BP holds 34% working interest.

The liquids produced from the Angelin field are directly exported to the Galeota Point Terminal in Guayaguayare, also operated by BPTT. The liquid export pipeline is 21km-long and has a diameter of 26in.

Contractors involved

McDermott International provided the pre front-end engineering and design (FEED) as well as the front-end execution planning and detailed engineering services for the project. The company was also awarded the engineering, procurement, construction, installation, and commissioning contract for the project in June 2017.

Frames Group was subcontracted by McDermott in November 2016 for providing the wellhead control panel and a chemical injection package for the gas project.