【摘要】 塔河油田三叠系是主要的产油气层之一,随着勘探的深入,低幅度构造圈闭油气藏是新的勘探研究方向。应用正演模拟技术和实际资料,建立低幅背斜油气藏砂体模型、地层尖灭模型、砂泥互层模型及其组合地质模型,在时间域和频率域对地质模型的反射特征和地震属性进行深入分析;确定了35Hz作为激发主频,这有利于提高分辨率和预测精度;振幅、频率、波阻抗等地震属性对油气储层敏感,预测效果较好。这可以减少预测的多解性和局限性,为勘探低幅度构造圈闭油气藏提供了科学依据。更多还原

【Abstract】 The triassic sandstone reservoir in the Tahe oilfield are important targets for petroleum exploration,and the low amplitude structure reservoir is the new research direction along with the development of exploration and exploitation.Low amplitude structure anticline reservoir sand body model,strata pinch out model,sandstone and mudstone inter-bedding model and combinative geological model are created by means of forward modeling technique and based on the actual data.This paper analyzes the seismic reflection of geological model in time domain and frequency domain respectively.It also points out that the 35 Hz shooting dominant frequencies is improving the resolution and prediction accuracy.The amplitude,frequency and wave impedance are sensitive parameters in reservoir prediction.The results can reduce the multiplicity of the solution and the limitations,and provide reference for low-amplitude structure reservoir prediction.更多还原