11 July 2017. The Syrian Arab Army (SAA), the National Defense Forces (NDF) and other pro-government factions have fully liberated the al-Hayl gas field area, including hills near the gas field, from ISIS terrorists in the countryside of Palmyra.

SOUTH FRONT

https://southfront.org/syrian-army-fully-libreates-al-hayl-gas-field-area-palmyra-countryside

At industryabout.com:

Al Hail Gas Field

Syria and Iraq War Industrial Map