【摘要】 苏里格气田主要储集层为盒8段辫状河河道砂岩,其砂体横向变化快,含气层与围岩的纵波阻抗差小,预测困难。岩石物理分析表明,纵横波速度比(vp/vs)、泊松比(σ)和λρ等3个弹性参数能够反映地层的含油气性信息。在横波预测的基础上,对苏里格地区进行了叠前地震反演,取得了很好的应用效果,为该区含油气性预测提供了依据。更多还原

【Abstract】 The main reservoir in the Sulige gas field lies in the sandstone of the Segment He8 braided river channel.The sand body varies quickly in lateral direction,and it is difficult to predict for little difference of impedance between gas-bearing bed and surrounding rocks.According to petrophysical analysis,some elastic parameters such as P-S velocity ratio,Poisson ratio,λρ could reflect the informations about hydrocarbons in the formation.Based on the S-wave prediction,we carried out pre-stack seismic inversion in the Sulige district and gained good results which provides an important method for the hydrocarbon-bearing prediction in this area.更多还原