地震相分析在沉积相研究中的应用
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摘要
针对涠洲A油田流沙港组沉积相带变化复杂、井间优势储层展布认识不清的问题,利用地震反射的外部几何形态、内部反射结构、振幅、频率、连续性等参数,对地震相类型进行了精细划分,识别出填充型地震相、丘状-透镜状地震相、席状地震相以及中弱振幅-中低连续地震相4种典型地震相,并将地震相展布特征与区域沉积背景及测井相特征相结合,把地震相转化为沉积相,从而确定了该油田流沙港组沉积类型,明确了优势储集相带。
In view of the complex changes of sedimentary facies belts and unclear understanding of the distribution of interwell dominant reservoirs in Liushagang Formation of Weizhou A Oilfield,by using the external geometry,internal reflection structure,amplitude,frequency and continuity of seismic reflection,seismic facies types are delicately classified,and four types of seismic facies are recognized: packed facies,domal-lenticular facies,sheet facies and medium-weak amplitude,medium-weak continuity facies. Combined with the regional sedimentary background and logging characteristics,the seismic facies analysis results finally identify the distribution of sedimentary facies. The sedimentary types of Liushagang Formation in this oilfield are determined and the dominant reservoir facies belts are defined.
In view of the complex changes of sedimentary facies belts and unclear understanding of the distribution of interwell dominant reservoirs in Liushagang Formation of Weizhou A Oilfield,by using the external geometry,internal reflection structure,amplitude,frequency and continuity of seismic reflection,seismic facies types are delicately classified,and four types of seismic facies are recognized: packed facies,domal-lenticular facies,sheet facies and medium-weak amplitude,medium-weak continuity facies. Combined with the regional sedimentary background and logging characteristics,the seismic facies analysis results finally identify the distribution of sedimentary facies. The sedimentary types of Liushagang Formation in this oilfield are determined and the dominant reservoir facies belts are defined.
引文
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[2]GAO Dengliang.Application of seismic texture model regression to seismic facies characterization and interpretation[J].The Leading Edge,2008,27(3):394-397.
[3]GAO Dengliang.Application of three-dimensional seismic texture analysis with special reference to deep-marine facies discrimination and interpretation[J].AAPG Bulletin,2007,91(12):1665-1683.
[4]ZENG Hongliu.Seismic geomorphology-based facies classification[J].The Leading Edge,2004,23(7):644-645.
[5]朱剑兵,赵培坤.国外地震相划分技术研究新进展[J].勘探地球物理进展,2011,32(3):167-171.
[6]谢玉洪,刘力辉,陈志宏.中国南海地震沉积学研究及其在岩性预测中的应用[M].北京:石油工业出版社,2010:73-75.
[7]PAYTON C E.地震地层学[M].牛毓荃译.北京:石油工业出版社,1980:112-134.
[8]陆基孟.地震勘探原理及资料解释[M].北京:石油工业出版社,1991:205-208.
[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]吴因业,顾家裕,郭彬程,等.油气层序地层学[M].北京:石油工业出版社,2015:151-157()