松辽盆地南部天然气分布与成因

DISTRIBUTION AND GENESIS OF NATURAL GAS IN SOUTHERN SONGLIAO BASIN

徐兑昌

Xu Duichang

石油工业部辽河石油勘探局地质处

Liaohe Bureau of Petroleum Exploration, Ministry of Petroleum Industry

松辽盆地二十余年油气勘探实践表明,油气地质储量相差悬殊.从盆地南部来看,探明的天然气地质储量仅占油气地质储量的2%.油田伴生气占天然气总地质储量的91.5%.生化甲烷气占天然气总地质储量的6.4%.煤成气仅占盆地南部天然气总地质储量的2.1%.由此看来,盆地南部天然气勘探程度是很低的.煤成气的勘探,在盆地南部天然气勘探中占的比例就更小了.

Taking the petroleum geolgy of the southern Songliao Basin as background,based on the geological and geochemical condition of the generation of natural gas,this paper studies the analytical data of 320 gas samples and finds out that the natural gases of the southern Songliao Basin could be divided laterally into districts and vertically into zones.According to the organic geochemistry characteristics,four genetic types of gases are recognized.Furthermore,the favourable areas and the guideline for natural gas exploration in southern Songliao Basin are pointed out.

https://doi.org/10.11781/sysydz198604335