辽河盆地东部凸起及邻区奥陶系储层特征

以薄片鉴定、铸体分析、地震特殊处理和分析测试为基础,研究了辽河盆地东部凸起奥陶系储层的岩石学特征、储集空间类型、孔喉结构和物性特征,并进一步探讨了影响控制储层的有利因素和不利因素。白云石化作用、埋藏期溶解作用和表生期岩溶作用是改善储层的主要因素,而表生期岩溶作用对储层改造剧烈,又是其中最重要的一种影响因素;压实作用和胶结作用则是对储层破坏的两大主要因素。研究表明,奥陶系风化壳储层将是今后勘探的重点目的层。

THE CHARACTERISTICS OF ORDOVICIAN RESERVOIR IN EAST UPWARDING AND VICINITY IN LIAOHE BASIN

On the foundation of thin- section identification, cast analysis, special seismic treatment and experience data, this paper studies the characteristics of Ordovician reservoir in east upwarding and vicinity in liaohe basin, the contents include the lithologic characteristics, reservoir space types, porethroat structure and physical property. The authors conduct the further probe on the major factors, which control reservoir formation. The favorable factors include dolomizatopn and segmentation. In the end, authors point out Ordovician crust of weathering will be the important target in the further exploration.