【摘要】 河流相地层的等时对比一直是油气勘探开发的重点和难点,而基于基准面旋回的高分辨率层序地层学则为此增添了行之有效的技术手段。基准面旋回控制了层序的形成及其内部地层的叠加样式,因此,基准面旋回的识别是高分辨率层序地层学分析的基础。根据钻井、测井及地震资料的综合分析,以A/S(可容空间/沉积物供给)值的变化趋势为依据,可以识别不同级次的基准面旋回。地震剖面可以用来确定长期基准面旋回的界面,岩心剖面和测井资料可以直接判定相序与水深变化,能较容易地识别出短期与中期基准面旋回。更多还原

【Abstract】 It is important and difficult for isochronous correlation datum of fluvial facies stratum in exploration and development of petroleum,while high resolving power of sequence stratigraphy based on the datum plane cycle is an additional feasible technical method for it.The recognition of datum plane cycle is the basis of high resolving power of sequence stratigraphy,because the formation of sequence and superimposed styles of inner sequence are controlled by datum plane cycle.Based on the comprehensive analysis of drill well,logging and seismic data,the various datum plane cycles can be identified according to the ration of accommodation and sediment supply.Long-term datum plane cycle can be identified by use of seismic section,short-moderately-term datum plane cycle can be marked easily based on core section and logging data,which can be used to judge facies sequence and change of water depth.更多还原