辽河东部凹陷南段沙三上亚段沉积特征与聚煤规律

根据单井岩性、沉积构造、测井以及连井剖面，对东部凹陷南段沙三上亚段进行了沉积环境和聚煤规律分析，认为：沉积环境主要为冲积扇、曲流河、辫状河、三角洲、洪泛平原、滨浅湖以及半深湖。研究发现，研究区沙三上亚段聚煤环境类型多样，目前已发现8个聚煤区：缓坡带的桃园三角洲聚煤区、黄金带辫状河聚煤区、热河台辫状河聚煤区、桃园废弃河道聚煤区、于楼废弃河道聚煤区、热河台废弃河道聚煤区，中间洼陷带的荣兴屯聚煤区、小龙湾聚煤区，聚煤区沿低洼地带呈长轴展布。煤层主要发育于辫状河泛滥平原、曲流河废弃河道、三角洲平原以及滨湖沼泽环境中，其中，辫状河泛滥平原、三角洲平原以及滨湖沼泽环境形成的煤层分布范围较广，为煤型气有利勘探区。

Deposition characteristics and coal-forming regularity of the upper-Es3 in southern eastern sag of Liaohe depression

Analysis of depositional environment and coal accumulating regularity of the upper-Es3 in southern eastern sag was conducted based on the lithological characters,sedimentary structure,logging data and the correlation of cross sections. It indicates that the sedimentary environments consist of alluvial fan,meandering river,braided river,delta,floodplain,shore-shallow lake and semi-deep lake. Various type of coal accumulation environment and eight coal-bearing areas has been found so far in the upper-Es3:Taoy...