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地震相分析是进行含油气盆地沉积体系研究的重要手段。传统的地震相分析方法主要根据地震属性或波形特征的相似性进行地震相的划分。当岩性组合复杂造成地震属性难以和地震相建立较为匹配的相关关系时,传统地震相分析方法存在着较强的多解性。本文提出基于沉积参数的地震相预测方法是首先根据地震属性和测井数据预测出砂层厚度、油层厚度、灰质厚度、地层厚度等的沉积参数的分布特征,再将这些沉积参数输入进行地震相的划分。与直接使用地震属性相比,沉积参数能更好地刻画沉积微相特征,因而可以有效降低多解性。该方法在济阳坳陷车西地区深层勘探中取得了良好的应用效果。
Seismic facies analysis is an important means to carry out research on sedimentary systems in petroliferous basins. The traditional method of seismic facies analysis divides seismic facies mainly according to the similarity of seismic attributes or waveform features. When the combination of lithology is complex and the seismic attributes are hard to establish a matching relationship with the seismic facies, the traditional seismic facies analysis methods have strong multi-solution. This paper proposes that the seismic facies prediction method based on sedimentary parameters first predicts the distribution characteristics of sedimentary parameters such as sand layer thickness, oil layer thickness, gray matter thickness and formation thickness according to seismic attributes and well logging data, and then inputs these sedimentary parameters into the seismic phase The division. Compared with the direct use of seismic attributes, sedimentary parameters can better depict the characteristics of sedimentary microfacies, which can effectively reduce the multiplicity. The method has achieved good results in deep exploration in Chexi area of Jiyang depression.