约束稀疏脉冲反演在杜坡油田核三段中的应用

Application of constrained sparse spike inversion in the third member of Hetaoyuan Formation in Dupo Oilfield

杜坡油田储层受构造和河道砂体的双重控制,断裂极为发育,储层横向变化快,阻碍了油田后期的开发生产。为了更加清楚地认识储层平面展布特征,亟需通过地震反演技术来刻画储层砂体的发育和分布情况。通过分析研究区地质、地震及测井等资料,对核三段Ⅱ—Ⅵ油组进行储层预测。根据约束稀疏脉冲反演的基本原理,首先对数据进行可行性分析;其次进行井震联合标定、子波提取;然后利用解释的层位、断层构建框架模型;最后在低频模型基础上通过设置重要的反演参数完成约束稀疏脉冲反演研究。利用反演成果分析了杜坡油田核三段砂体的发育和分布情况,这在一定程度上刻画了储层的展布特征,为杜坡油田下一步开发调整提供了参考依据。

The reservoir in Dupo Oilfield is controlled by structure and channel sand body, and has fast lateral variation and well developed fracture, which restricts the development of oilfield in the late production. In order to make clear the reservoir distribution characteristics, we need to depict the development and distribution of sand body through seismic inversion technique. Based on the geologic, seismic and VI oil groups of the third member of Hetaoyuan Formation. inversion, carried out feasibility analysis, well-to-seismic data, this paper carried out reservoir prediction of Ⅱ - According to the basic principle of constrained sparse spike calibration and wavelet extraction, formed frame model by using interpreted formation and fault, then established low frequency model, and finally completed the study on constrained sparse spike inversion by setting important parameters. Through analyzing inversion results, the development and distribution of sand body of the third member of Hetaoyuan Formation in Dupo Oilfield are clear, which depicts the distribution characteristics of reservoir to a certain extent and provides a reference for the next development and adjustment of Dupo Oilfield.