Turkmenistan is Central Asia's largest gas producer. Galkynysh (South Iolotan), the world's second largest gas field, will underpin future production. Turkmenistan exports gas to China via the Turkmenistan-China Gas Pipeline and is now highly reliant on the Chinese gas market. Turkmenistan's economy is tightly controlled and its investment climate is challenging. Only service contracts are currently available for onshore upstream projects. PSCs can be negotiated for offshore Caspian Sea acreage, where Dragon Oil and PETRONAS operate large-scale projects.