关键词: 基准面旋回, 储层结构, 非均质性, 砂体厚度, 物性, 濮城油田

Abstract: The base level cycle controlled sand distribution and the reservoir heterogeneities in Pucheng oil reservoir.In the rising period of short cycle, the reservoir heterogeneity model with better property at the bottom of the sandstone and poorer to top,as well as with a totally different way in the falling semi-cycle.It was reversed in the lowering period of short cycle.At the lower position of medium and long term cycles,braided channels with a wide spread area and good property were well developed,while the braided channels were small,and the sand spread area was limited with poor property at the high position of the cycles.In the rising semi-cycle of long-and medium-cycles,the reservoir became poorer from bottom to top,while it became better in the falling semi-cycle.From the bank to lacustrine center,the braided channel became weaker and smaller,and the reservoir architecture turned from mainly channel sands near the middle fan to mainly sheet-like sands near the front of middle fan,and finally turned to lacustrine mud in the lake center.

Key words: base level cycle, reservoir architecture, heterogeneity, sands thickness, physical property, Pucheng Oilfield