利用地震信息评价陆相盆地岩性圈闭的关键点分析

Using multi-parameters analysis of seismic information to evaluate lithologic traps in continental basins

根据陆相盆地岩性圈闭边界条件复杂、形态不规则、赋存状态隐蔽、成藏条件复杂、运聚机理多样等圈闭特点和圈闭本身面积相对较小、储集体厚度较薄且成群分布的特点,认为在三维高分辨率地震勘探技术基础上,地震数据体的选择、层位-储层的精细标定、目标体顶底约束层位的解释、分析时窗大小的确定是地震信息多参数综合识别、优选、描述与评价岩性圈闭的关键点。而地震信息多参数综合分析方法中包含的具体技术如地震相分类、地震反演与储层预测、地震属性分析、流体势分析与含油气检测、三维可视化等根据各自应用的侧重点不同,在实际应用中也具有相应的关键点。同时考虑岩性油气藏勘探起步较晚,勘探方法和技术仍处于有效的探索阶段,相关的技术规范和标准仍需要完善。

The lithologic traps in continental basins are characterized by complex boundary condition, irregular Shapes; subtle occurrence, complex accumulation and various migration mechanisms, and the features of itself are of small area, thin reservoir and occurring in group. According to all these characteristics, it is proposed that the Selection of seismic data, calibration of horizon and reservoir, interpretation of top and bottom controlling horizons and determination of time window are the key factors for the lithologic traps identification, optimization, description and evaluation with multi-parameters analysis of high-resolution 3D seismic. The multi-parameters analysis methods include seismic facies classification, seismic inversion and reservoir prediction, seismic attributes analysis, fluid potential analysis, hydrocarbon detection and 3D visualization. Since the lithologic reservoir exploration is at the beginning stage, the related technological specifications and criterions are still need to be improved.