【摘要】 港西油田河流相储层具有形态多样、单层厚度薄、横向变化快等特征,在地震上砂岩与泥岩的速度较接近,波阻抗差小,地震反射波振幅弱,利用常规储层预测方法难以识别,因而成为油田勘探和开发的瓶颈。在精细储层标定和解释的基础上,提出了基于等时层切片的最佳时窗河道砂体刻画技术,查明了河道相砂体的展布规律,能够识别最小厚度约为4.5m的单砂体,落实了有利的岩性圈闭,据此部署的钻井获得了工业油流。该技术手段对于类似地区河道相砂体的勘探与开发具有一定的参考价值。更多还原

【Abstract】 The fluvial reservoirs in Gangxi oilfield are characterized by diversified geometry,thin sandstone,and rapid lateral variations.It is difficult to identify sand bodies using the routine methods because the similarity in velocity between sandstone and mudrock leads to weak amplitude of seismic reflections.Therefore the prediction of fluvial reservoirs has become a real bottleneck for oil-gas exploration and development.A new approach called best time-window description is proposed to predict the distribution of channel sand body on the basis of accurate reservoir calibration and interpretation in Gangxi oilfield.Single 4.5m thick sandstones can be identified.Favorable lithologic traps are delineated,and industrial oil flows have been discovered in the wells drilled in these areas.This method is valuable for the exploration and development of channel sand bodies of similar geological characteristics.更多还原