南疆塔里木板块北部轮南油田在上奥陶统良里塔格组沉积期显示大致由东向西加深的陆表海缓坡地貌，19口钻井岩芯灰岩中可鉴定出钙质微生物Renalcis, Girvanella，Wetheredella，Garwoodia，Phacelophyton yushanensis，Hedstroemia？和Halysis；钙藻类Vermiporella, Dasyporella, Plexavaria，Solenopora；后生动物类型含海绵、珊瑚、苔藓虫、三叶虫、腕足动物、棘皮动物、腹足类、介形类等。连井古生态地层单元对比显示生物礁和灰泥丘主要发育于轮南油田西部井区，而东部井区则多为台内碎屑滩相沉积；海底地貌差异，特别是向西水深加大可视为控制轮南油田良里塔格组生态组合展布的主要因素。

Total 19 drilling cores from the Upper Ordovician Lianglitag Formation in Lunnan Oil Field of northern Tarim Block are analyzed as limestone-dominated sequences in a westward deeping ramp of epicontinental sea. Calcimicrobes of the Renalcis, Girvanella，Wetheredella，Garwoodia，Phacelophyton yushanensis，Hedstroemia？and Halysis；calcareous algae of the Vermiporella, Dasyporella, Plexavaria，Solenopora as well as metazoan fauna of the sponge, coral, bryozoan, trilobite, brachiopod, echiodermata, gastropod, ostracoda are of the roles of the biotic components in diverse bioclastic limestones. Palaeoecological correlations along wells show that western ramp was favorable for growth of reefs and lime mudmound. Intra-platform in the eastern part is dominated by diverse intra-clastic banks. Seascape changes with westward deeper marine-floor are considered as the key roles in configurations of the temporal and spatial distribution patterns of the ecological associations.