徐家围子气田火山岩抗钻特性评价及应用

大庆油田徐家围子地区深部火山岩地层是重要的天然气储层，但该区块深层泉二段以下地层岩性致密坚硬，可钻性差，掌握营城组火山岩地层岩性特征至关重要。在分析测井资料与岩石力学特性参数之间关系的基础上，综合测井资料及室内岩心实验结果，建立了该地区深部火山岩地层抗钻特性与声波测井间的关系模型，应用该模型获取该地区地层抗钻特性参数剖面并进行了钻头初选。结果表明，综合运用测井资料、井史资料并结合一定的岩心试验结果建立地层抗钻特性参数剖面，在此基础上进行钻头优选，给出了该地区深层火山岩地层钻头选型标准。所建立的火山岩地层抗钻特性参数模型能较好地反映该地区的实际情况。

EVALUATION ON THE ANTI-DRILLABILITY CHARACTERISTICS OF DEEP VOLCANICS LAYER AND ITS APPLICATION IN XUJIAWEIZI GAS FIELD

The deep volcanics formation of Xujiaweizi area is an important gas reservoir in the Daqing oil field. The lithology below the second member of Quan formation is compact and solid with very low drillability, and represents features in the volcanics formation of Yingcheng group. So, it is utmost important to have a full understanding on the lithology characteristics of the deep volcanics formation. On the basis of analyzing the relationship between the well logging data and the parameters of rock mechanical behavior, synthesizing the well logging data and interior core laboratory findings, this study developed a model on the relationship between anti drillability characteristics and sonic logging data in deep volcanics formation, and by this model acquired the formation characteristics profile, and simultaneously optimized the type of bits to be used accordingly. The result indicates that this model is well fit for this area, and the bit type selected is reasonable through the in situ test. This model on the anti drilliablity characteristics of deep volcanics layers can reflect the actual situation in this area very well.