东营凹陷深部储层井震关系研究

Study on the relationship between wells and seismic in deep reservoirs in Dongying sag

东营凹陷深部储层成层性较差,速度结构复杂,工区内井震关系不明确.本文首先通过地质成因分析,明确了研究区深部储层主要发育在沙四下和孔一中的"红层";通过对深部储层测井曲线的雷达图分析和交会分析,确定了SP、AC、GR、CNL、R4为东营凹陷深部储层的五种敏感测井响应;通过井震标定与地震剖面精细解释,完成了研究区井震构架的建立,明确了研究区储层符合薄互层的结构特征;在不同相带井震分析基础上,分别建立了沙四下和孔一中井震关系模板,有利于储层的定性甄别;通过定量研究多属性井震关系,得到了描述深层有利储层的最佳优势属性;最后开展基于多元线性回归和SVM的储层预测研究,找到了预测深部储层井震厚度关系的有效方法.

The deep reservoirs in Dongying sag have poor stratification,complicated velocity structure,and unclear well-seismic relationship in the work area.First,through the analysis of geological genesis,this paper clarifies that the deep reservoirs in the study area are mainly developed in the"red layers"under Es4 x and Ek1 z;through radar chart analysis and intersection analysis of deep reservoir logging curves,SP,AC,GR,CNL,and R4 are the five sensitive logging responses of deep reservoirs in the Dongying sag;through seismic calibration and fine interpretation of seismic profiles,the establishment of the well-seismic framework in the study area was completed,and the structural characteristics of the reservoir in the study area are determined to conform to thin interbeds.On the basis of the well-seismic analysis of different facies zones,the well-seismic relationship templates of Es4 x and Ek1 z are established,which is conducive to the qualitative identification of the reservoir;through the quantitative study of multi-attribute well-seismic relationships,the best advantageous attributes describing deep favorable reservoirs are obtained;finally,a reservoir prediction study based on multiple linear regression and SVM is carried out,and an effective method is found to predict the relationship between deep reservoir well seismic thickness.