【摘要】 河流相油气藏是我国石油勘探的主要目标之一。它的特点是储集体孔渗性好、埋深小、产量高、分布广,但河道变化频繁、相带也不稳定,给精细解释带来困难。为此,本文对河流相储集体的精细解释与描述方法开展了集中研究,并取得了一定的地质效果。首先制作河流相储集体的三维理论模型,研究该类油藏的基本特征;在此基础上,以LHK实际资料为例,分析该区河流相油藏的频带分布,提取能反映目的层频率特征的20Hz分频数据体,进行古河道的分频解释;采用抗噪性和分辨率较高的第三代相干体解释目标层段的多个河道砂体;探索用复合属性来研究地质体的可能性,并提出一种新的地震属性——级联属性,即以原始数据体中提取的地震属性为基础,从中再提取新的相关地震属性,更有利于改善显示效果。更多还原

【Abstract】 River facies reservoir is one of major targets in oil exploration in China, which is characterized by good porosity and permeability, shallow buried depth,high production and wide spread,but on the other hand,the rapid changed channels and unstable facies led to have difficulty in fine interpretation. For that reason,the paper made concentrated studies for fine interpretation and description of river facies reservoir and achieved a certain geologic effects. First, making 3-D theoretical model of river facies reservoir and studying the basic feature of the reservoir; on that basis and taking LHK practical data as an example analyzing band distribution of river facies reservoir in the region and picking up frequency-division data volume of 20 Hz reflected the feature of frequency of targets and conducting frequency-division interpretation of palaeochannel; using the third generation of coherent data volume characterized by anti-noise and good resolution for interpretation of multiple channel sand bodies; exploring the possibility using composite attributes to study geologic bodies and presenting a new attribute-series attribute,i, e. on the basis of seismic attributes taken from raw data volume,the new relative seismic attribute is picked up from it that is of benefit to improve the showing effects.更多还原