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地震相是特定沉积相或地质体在地震剖面图上所反映的主要特征的总和,是沉积和地震之间联系的枢纽。利用不同相带的井在地震剖面上的标定结果和声波时差统计,在常规地震剖面和瞬时相位剖面初步得到相带划分图。根据地震反射层的外形结构、频率、振幅及连续性等特征,建立三种沉积相对应的地震相模式,分析沿目标地层顶界地震属性切片,筛选对相带边界表征清晰的属性,确定出地震相的分布区域,这对以后的储层预测和生物礁的发现提供技术支持。
Seismic facies is the sum of the major features reflected in a seismic profile of a particular sedimentary facies or geological body and is the hub of the connection between sedimentation and earthquakes. Using the calibration results of the seismic facies with different facies and the acoustic time-difference statistics, the phase-division maps are obtained in the conventional seismic sections and the transient phase sections. According to the characteristics of seismic reflection layer, such as shape, frequency, amplitude and continuity, the seismic facies patterns of the three sediments are established, the seismic attribute slices along the top boundary of the target formation are analyzed, and the clear properties of the boundary of the facies band are screened out Seismic facies distribution area, which provides technical support for future reservoir prediction and reef discovery.