利用地震属性聚类分析技术预测辽河油田有利油气聚集带

研究区位于渤海湾东部断陷盆地,地质构造复杂,地震预测难度大.文中选取了与含油气性相关的10种地震属性进行二维交汇分析和油气分布相关性分析,优选出5种属性进行聚类分析.分析表明,研究区含油气区带具有中—低振幅、低能量半衰时、中—高平均瞬时频率、低F2频率及中等平均弧线长度的地震属性特征,特定的聚类区能可靠地反映含油气分布,聚类分析结果提供了进一步勘探的有利目标区域.

Prediction of the favorable hydrocarbon accumulation zone in some oilfield in Liaohe by means of cluster analysis of seismic attributes

The studied area locates in eastern fault basin,it has complex geologic structure,and therefore its seismic prediction is hard.Ten kinds of seismic attributes are extracted and analyzed with 2-D intersection method.Their relativities to hydrocarbon potential are also analyzed.Then of ten kinds of seismic attributes,five kinds are selected out as the input of cluster analysis.The cluster analysis result indicates that the hydrocarbon potential zone in the studied area has the seismic attributes of middle--low amplitude,short energy half decay time,middle--high average instantaneous frequency,low F2 frequency and middle average cambering length.Certain clustered zone can reliably show the hydrocarbon distribution in this area.The attribute cluster analysis result can provide favorable objective areas for further exploration.