地层层序控制下的地震储层预测技术——在建南地区长兴组中的应用

Application of Seismic Reservoir Prediction Technology under the Control of Stratigraphic Sequence in Jiannan Changxing Formation

建南长兴组生屑滩储层具有厚度薄、非均质性强的特点,对储层分布规律认识不清,一直制约着该区块生屑滩相储层的有效开发。以建南地区长兴组为主要研究层系,结合钻井、测录井、地震及分析化验资料,开展层序地层精细划分,建立区域等时地层格架。通过对长兴组生屑滩储层进行精细标定,明确了储层地震响应特征,运用地震多属性分析、波阻抗反演等手段,进一步开展地震储层精细预测。研究结果表明,生屑滩储层纵向上主要分布在长兴组Ⅳ级层序的SSQ2中,平面上主要分布在研究区台地边缘J43井区及JZ1井区。

Shavings beach reservoir in Jiannan Changxing Formation is characterized by thin depth and strong heterogeneity. No clear understanding of its distribution rule has been restricting its efficient exploitation. This paper carries out detailed classification of stratigraphic sequence and establishes regional isochronal stratigraphic framework, taking Jiannan Changxing Formation as chief research bed series and combining the data including drilling data, logging data, seismic data and analytical experiment data. It makes clear reservoir seismic response characteristic through fine calibration of shavings beach reservoir in Jiannan Changxing Formation. It also launches finer seismic reservoir prediction by taking measures of seismic multi--attributes analysis and wave impedance inversion. Research results show that shavings beach reservoir is mainly located vertically in SSQ2 of Class 4 sequence of Changxing Formarion and horizontally in J43 and JZ1 well blocks of platform margin in research area.