LONDON—Shipping company GasLog has agreed to lease LNG tanker GasLog Sydney to U.S. LNG exporter Cheniere Energy Inc. (NYSE American: LNG) for several years from September, it said in a statement.

Royal Dutch Shell currently has the vessel under charter, which expires in September.

Cheniere’s LNG portfolio is growing as it boosts production from its Sabine Pass, La., facility and prepares to start output at its Corpus Christi, Texas, site.

Cheniere has an option to extend the charter for up to two consecutive periods at rising hire rates, GasLog said. In May, GasLog struck a seven-year charter deal for a newbuild LNG carrier with British utility Centrica.