河流相储集体的精细解释与描述
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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。
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.
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.
引文
[1] 魏红梅等．斜坡带曲流河道砂体成藏模式及描述方法 ——以老河口油田为例．石油地球物理勘探,2003,38 (2):173-177
[2]吴朝容等．河道砂体识别技术．石油物探,2003,42(2): 204-207
[3]黎文等．用地震剖面划分沉积微相．石油物探,2000, 39(1):57-62
[4] 宁松华,张厚福．古河道解释及在油气勘探中的意义． 沉积学报,1997,15(3):33-36
[5]纪彤洲等．相干体技术在河道预测中的应用．石油物 探,2003,42(3):399-401
[6] 张军华等．小波多分辨率相干数据体的提取及应用．石 油地球物理勘探,2004,39(1):33-36
[7] Gersztenkorn A and Marfurt K J. Eigenstructure-based coherence computations as an aid to 3-D structural and stratigraphic mapping. Geophysics, 1999, 64 (1):104-111
[8]毕俊凤等．分频解释技术在桩106地区馆上段河道砂体 描述中的应用．油气地质与采收率,2003,10(5):38- 40
[2]吴朝容等．河道砂体识别技术．石油物探,2003,42(2): 204-207
[3]黎文等．用地震剖面划分沉积微相．石油物探,2000, 39(1):57-62
[4] 宁松华,张厚福．古河道解释及在油气勘探中的意义． 沉积学报,1997,15(3):33-36
[5]纪彤洲等．相干体技术在河道预测中的应用．石油物 探,2003,42(3):399-401
[6] 张军华等．小波多分辨率相干数据体的提取及应用．石 油地球物理勘探,2004,39(1):33-36
[7] Gersztenkorn A and Marfurt K J. Eigenstructure-based coherence computations as an aid to 3-D structural and stratigraphic mapping. Geophysics, 1999, 64 (1):104-111
[8]毕俊凤等．分频解释技术在桩106地区馆上段河道砂体 描述中的应用．油气地质与采收率,2003,10(5):38- 40
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