单一河道砂体边界地质模型及其地震正演响应特征
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摘要
在河流相岩性油气藏勘探开发中,单一河道砂体边界的识别是关键。由于河道砂体尺度小、散度大,地震资料分辨率有限,砂体边界识别存在不确定性。在密井网条件下,通过应用钻井和测井等资料,从曲流河的沉积特点和演变规律出发,分析河流相砂体边界展布规律,确定了单一河道边界的4种识别标志并分别建立了地质模型。利用地震正演模拟技术研究了4种识别标志为边界条件的单一河道砂体地震响应特征,确定了它们的主要地震相模式,提高了利用地震资料识别单一河道砂体的可靠性。
It is the key to identify the boundary of the sand body of a single river channel in exploring lithologic reservoir of fluvial facies. The identification for the boundary of sand body exist uncertainty as small scale and large divergency of the sand body of channel and the limited resolution of seismic data. Under dense well pattern conditions, four identification indicators, which were respectively established geologic models, were determined by using well information and log to analyze through-going rule of the boundary of the sand body from the sedimentary characteristic and development rule of meandering river. The seismic response characteristic of the single river channel, taken the four identification indicators as boundary conditions, were analyzed by seismic forward modeling and their main seismic facies modes were determined. The reliability of identifying the sand body of single river channel was improved.
It is the key to identify the boundary of the sand body of a single river channel in exploring lithologic reservoir of fluvial facies. The identification for the boundary of sand body exist uncertainty as small scale and large divergency of the sand body of channel and the limited resolution of seismic data. Under dense well pattern conditions, four identification indicators, which were respectively established geologic models, were determined by using well information and log to analyze through-going rule of the boundary of the sand body from the sedimentary characteristic and development rule of meandering river. The seismic response characteristic of the single river channel, taken the four identification indicators as boundary conditions, were analyzed by seismic forward modeling and their main seismic facies modes were determined. The reliability of identifying the sand body of single river channel was improved.
引文
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[3]陈清华,曾明,章凤奇等.河流相储层单一河道的识别及其对油田开发的意义.油气地质与采收率.2004,11(3):13￣15
[4]夏庆龙,赵志超,赵宪生.渤海浅部储层沉积微相与地球物理参数关系的研究.天然气工业,2004,24(5):51￣53
[5]李椿,于生云,黄伏生等.河流相储层建筑结构的解剖与应用.大庆石油学院学报,2004,28(2):92￣94
[2]赵霞飞.河流相模式与储层非均质性.成都理工学院学报,1999,26(4):357￣364
[3]陈清华,曾明,章凤奇等.河流相储层单一河道的识别及其对油田开发的意义.油气地质与采收率.2004,11(3):13￣15
[4]夏庆龙,赵志超,赵宪生.渤海浅部储层沉积微相与地球物理参数关系的研究.天然气工业,2004,24(5):51￣53
[5]李椿,于生云,黄伏生等.河流相储层建筑结构的解剖与应用.大庆石油学院学报,2004,28(2):92￣94
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