综合利用测井—地震方法识别火成岩裂缝

Igneous rock fracture prediction with well logging and seismic data

针对裂缝型储层非均质性强、分布规律复杂以及利用单一测井或地震方法识别裂缝具有局限性的特点,提出综合利用测井—地震方法识别火成岩裂缝。主要内容包括:1分析测井及地震裂缝识别方法的特点;2利用钻井取心对测井识别的裂缝进行级别刻度;3通过井震标定搭建测井与地震时深对接的桥梁,拟合测井裂缝综合概率指数与地震边缘检测强度值的关系,精细划分地震边缘检测裂缝级别。该方法既能提高裂缝预测结果的可靠性,又能对纵向及横向不同尺度的裂缝进行有效识别。以胜利油田富林洼陷实际资料为例,对该区中生界火成岩裂缝进行了测井—地震综合识别,取得了良好的效果。

Fracture reservoir has attributes of strong heterogeneity and complex distribution,well logging or seismic method cannot be used alone to effectively predict fracture distribution.Thus,a new comprehensive fracture prediction method with both well logging and seismic data is presented in this paper,which contains three parts:1Analyze well logging-based and seismic-based methodscharacteristics for fracture prediction; 2Rank fractures predicted on well logging data by drilling cores crack;3Calibrate seismic data with logging information and fit well logging fracture probability and seismic facture intensity.This method can improve not only fracture prediction reliability and also fracture identification in 3Dseismic data volume.The proposed method achieves good results in Mesozoic igneous reservoir identification in Fulin Sag,Shengli Oilfield.