关键词: 准噶尔盆地, 侏罗系, 地震勘探, 非构造油气藏, 地震物理波场模拟, 加权阻抗属性, 地震响应特征

Abstract: The Jurassic reservoir in hinterland of Junggar basin is characterized by deep burial depth, non-structural trap and big difficulty for petroleum exploration. This paper presents the physical model for the Jurassic reservoir in the basin. The simulated result matches to the field core statistical result in order to achieve high accuracy. Then the seismic wave field simulations are conducted. The study indicates that the weighted impedance attributes can be used to effectively distinguish fluid bearing sand from dry sand, through decomposition of P-wave information into rock rigid modulus and elastic modulus, thus highlighting the seismic attribute of fluid-bearing formations or sands.

Key words: Junggar basin, Jurassic, seismic exploration, subtle reservoir, non-structural reservoir, seismic wave field simulation, weighted impedance attribute, seismic response feature