页岩气地质“甜点”关键参数地震预测研究-以N地区为例

Shale Gas Geological Dessert Seismic Prediction Study in N Area

选择N工区为研究目标区,对五峰-龙马溪组页岩气地质"甜点"关键参数进行地震预测研究。文中对比分析了页岩气储层及非储层的测井响应特征,结合实际钻井建立了页岩气储层地质模型,利用地震正演方法研究了页岩气储层的地震响应特征。在此基础上,建立了页岩气地质"甜点"关键参数的地震预测思路以及确定了拟采用的地震技术。最终,利用测井分析方法、统计分析方法、拟声波地震反演技术、地震参数反演技术等完成了研究目标区目标段的页岩气地质"甜点"关键参数页岩厚度、有机碳含量、孔隙度、含气量的预测,预测结果与实际较吻合。

In this paper,N work area is selected as the research target area,the shale gas geology dessert parmaters of Wufeng-Longmaxi Formation is studied in seismic prediction method.The logging response characteristics of shale gas reservoir and non reservoir are compared and analyzed.Combination with actual logging drilling the author establish shale gas reservoir geological models and use seismic forward method to study shale gas reservoir seismic response characteristics.On this basis,the seismic prediction idea of shale gas geological dessert key parameters is established and the proposed seismic technology is determined.Finally,logging analysis method,statistical analysis method,pseudo acoustic seismic inversion technique and parameter inversion technique are used to predict the shale thickness,organic carbon content,porosity and gas content of the target shale section.The prediction result is in agreement with actual situation.