【摘要】 提出一种双临界差异层间速度分析法，其原理是利用纯泥岩、纯砂岩两种速度模型作为背景层速度，进行差异层间速度分析，进而预测地层岩性或含烃性。在吐哈盆地中侏罗统初步试验证明，双临界差异层间速度分析方法用于地层岩性预测有较高的精度。运用该分析方法指明了吐哈盆地胜北构造带储集体发育有利的部位。更多还原

【Abstract】 The principles of double critical differential interformation velocity analysis (DIVA)are studied. The technique of double critical DIVA is applied to study the middle Jurassic of Tuha basin. The result shows that the technique of double critical DIVA can be used to predict stratum lithologic with a high precision, and the good reservoirs in Shengbei structure zon of Tuha basin are proposed.更多还原