地震反演技术在桥口-白庙地区储层预测中的应用

Application of Seismic Inversion Technology in Reservoir Pre-diction in Qiaokou-Baimiao Area

桥口-白庙地区地质条件复杂,受构造位置和物源影响其沉积类型亦不相同,砂体分布和岩性变化大,应用地震反演技术,对储层进行预测,为油气分布和控制因素的研究奠定了基础。地震反演和储层预测采用了约束稀疏脉冲反演方法,把叠后的地震反射振幅数据变换为地层波阻抗数据,然后利用反演的波阻抗数据,估算出砂岩厚度和砂岩储层物性参数。根据该项技术,最终生成了各目的层的5类平面成果图,即地层厚度、平均波阻杭、预测砂岩厚度、预测砂岩百分比、预测砂岩平均孔隙度等值图。地震反演与储层预测结果表明,在井均匀分布的约束下,能较好地预测砂岩储集层的平面分布,圈定面积和砂岩发育区,反映出物源方向及可能的油气分布。

There are complex geological characteristics and the different sedimentation types resulted from different structural position and substance sources in Qiaokou-baimiao area during deposition, which lead to different sand body distribution and big lithologic variation. According to the seismic inversion technology, this paper predicts the reservoir and lays a foundation for the research to the oil and gas distribution and controlling factors.