地震相分析在碳酸盐岩沉积相研究中的应用——以川东北地区PG气田为例
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摘要
针对PG气田井距大、目的层段平面相变快,单纯利用井点资料很难刻画沉积相平面展布特征的问题;利用三维地震资料平面分辨率高的优势,采用Stratimagic地震相分析技术,选取合适参数进行地震相分析,通过与主要地震相单元中单井微相分析成果结合,建立了地震相与沉积相的对应关系,将地震相转化为沉积相。该方法弥补了单纯用钻井资料进行沉积相划分的缺陷,提高了沉积相划分精度。
It was difficult to characterize the distribution of sedimentary facies only using well data because of the wide well spacing and the quick lateral facies variation in PG Gas Field.To deal with the both problems,stratimagic seismic facies analysis was used to take full advantage of high resolution of 3D seismic data.It chose appropriate parameters to analyze the seismic facies of target zones,establish the relationship between seismic facies and sedimentary facies and then get the distribution of sedimentary facies through combining the single well microfacies analysis in the main seismic facies unit.This method makes up the limitation of studying sedimentary facies only using well data,and improves the accuracy of it.
It was difficult to characterize the distribution of sedimentary facies only using well data because of the wide well spacing and the quick lateral facies variation in PG Gas Field.To deal with the both problems,stratimagic seismic facies analysis was used to take full advantage of high resolution of 3D seismic data.It chose appropriate parameters to analyze the seismic facies of target zones,establish the relationship between seismic facies and sedimentary facies and then get the distribution of sedimentary facies through combining the single well microfacies analysis in the main seismic facies unit.This method makes up the limitation of studying sedimentary facies only using well data,and improves the accuracy of it.
引文
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[4]黄小平,杜洪凌,史晓川.地震相分析在石南21井区沉积相划分中的应用[J].新疆石油地质,2004,25(6):671～672.
[5]黄锋,李志荣,廖玲,等.利用地震资料进行沉积相分析[J].石油物探,2003,25(3):197～201.
[6]黎文,周志才,吴焱.用地震剖面划分沉积微相[J].石油物探,2000,39(1):57～62.
[7]谢继容.Stratimagic地震相分析技术在川中油气勘探中的应用[J].石油物探,2002,41(增刊):319～322.
[8]赵军.地震属性技术在沉积相研究中的应用[J].石油物探,2004,43(增刊):67～69.
[9]段玉顺,李芳.地震相的自动识别方法及应用[J].石油地球物理勘探,2004,39(2):158～162.
[10]王晓平,陈波,臧殿光,等.地震相分析技术在伊通地堑储层沉积特征分析中的应用[J].石油物探,2008,47(2):172～178.
[11]穆星.利用地震几何属性和自组织神经网络进行地震相的自动识别[J].地质科技情报,2005,24(3):109～112.
[12]李强,戴鸿鸣.地震波形分类技术在红浅工井区的应用[J].断块油气田,2007,14(1):14～15.
[13]陈方鸿,王树平,李志政.三维可视化地震相分析在沉积相研究中的应用[J].石油勘探与开发,2005,32(3):73～75.
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