摘要
传统的储层预测主要在时间域或深度域进行,尤其对陆相复杂地质体而言,存在较强的多解性。另外,常规地震调谐体的分析是以地震资料的主频为基础,不考虑高频分量的贡献。为此,以层序地层学和地震沉积学等理论为指导,首先采用分频技术提取不同频段地震数据调谐体;然后,在等时地层格架约束的地震层位自动追踪和拾取的基础上,在时间域结合沉积旋回特性将层位追踪结果进行Wheeler域转换,构建地层对比和年代地层格架,实现年代地层和沉积体系域的同步解释,有效揭示了沉积组合间的空间关系;进而提取高频调谐体地层切片,实现层控薄储层预测,通过等时界面有效提高了薄砂体的横向预测精度。上述方法既能发挥地震数据的高纵向分辨率的优势,又能在Wheeler域发挥等时切片的横向分辨率的优势,减小了储层解释的多解性,提高了储层预测精度,为薄储层的识别提供了新思路。实际地震资料的应用结果验证了方法的有效性。
Conventional reservoir prediction methods are mainly carried out in the time domain and depth domain,which leads strongly multiple solutions, especially for continental complex geological bodies.Besides,conventional seismic tuning body analysis is based on the dominant frequency of seismic data without considering the contribution of high frequency components.Therefore we propose an approach to thin reservoir prediction based on the sequence stratigraphy and seismic sedimentolo- gy.First seismic tuning bodies in different segmented-frequency bands are extracted.Then after horizon automatic tracking constrained by isochronal stratigraphic framework,horizon tracking results are transformed into the Wheeler domain with characteristics of sedimentary cycles in the time domain,and the stratigraphic correlation and chronostratigraphie framework are constructed to realize the synchronous interpretation of chronos-tratigraphy and sedimentary system tract,which reveals spatial relationships of sedimentary assemblages.Then,stratigraphic slices of high-frequency tuning body are extracted to predict strata-bound thin reservoirs,and the transverse prediction accuracy of thin sand bodies is effectively improved with the isochronous interface.With high vertical resolution of seismic data and high transverse resolution of isochronous slices in the Wheeler domain, the reservoir interpretation multiplicity is reduced. The validity of the proposed approach is verified by seismic data applications.
作者
殷文
朱剑兵
李援
郭加树
李长红
Yin Wen;Zhu Jianbing;Li Yuan;Guo Jiashu;Li Changhong(Karamay Campus,Faculty of Petroleum,China University of Petroleum (Beijing),Karamay,Xinjiang 834000,China;Geophysical Research Institute,Shengli Oilfield Branch Co.,SINOPEC,Dongying,Shandong 257022,China;Information Center,Human Resource.and Social Security Bureau of Dongying,Dongying,Shandong 257091,China;College of Computer and Communication Engineering,China University of Petroleum (East China),Qingdao,Shandong 266580,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2018年第6期1269-1282,I0007,共15页
Oil Geophysical Prospecting
基金
国家重点基础研究发展计划("973"计划)项目"深层油气藏地球物理探测的基础研究"(2013CB228604)资助
关键词
地震分频调谐体
层位自动追踪
Wheeler域转换
体系域同步解释
薄储层预测
seismic segmented-fre
quency band tune
horizon automatic tracking
Wheeler transformation
synchronous interpretation in the system tract
thin reservoir orediction
