Oct 30 (Reuters) - Sino Gas & Energy Holdings Ltd SEH.AX :
* Full year gross production is now expected to average 16-18 mmscf/d
* Q3 production averaged about 13 mmscf/d
* Lowered full year production guidance to 16-18 mmscf/d
* Qtrly gross revenue $6.1 million versus $1.4 million a year ago