利用角度域信息精细识别深层碳酸盐岩缝洞型储层

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关键词：角度域，相干体，主频，时频谱，缝洞型储层，超深层，内部构型，储层描述 中图分类号：P631 文献标识码：A DOI：10.13810/j.cnki.issn.1000-7210.20240230

Abstract：Distinct from horizontally layered sedimentary reservoirs，fracture-cavity reservoirs feature vertical strikeslipand disolution.In seismic exploration，seismic signals received at different anglescontain diferent reservoir information，which provides advantages for a fine description of fracture-cavity reservoirs.To this end，this study proposes a novel method for fine identification offracture-cavity reservoirs by utilizing angle domain information. By extracting angle domain data，this approach expands the data sources and directions for seismic-based detailed descriptions of such reservoirs.Firstly，the seismic reflection characteristicsof fracturecavity reservoirs in the study area are analyzed by adopting full-azimuth data slices，folowed bya comparison of the cross-sectional features of the reservoirs across different azimuthal data.Next，the internal architecture is delineated by employing the maximum amplitude atributefrom small-angle data，while fault connectivity is assessed by leveraging the dominant frequency attribute derived from full-azimuth data.Finally，the maximum amplitude attribute corresponding to the energy cluster center inlarge-angle data is extracted to predict the oilbearing property and connectivity.The results are as follows.（1） The coherence attributes of full-azimuth data can more clearly delineate the contours offracture-cavity reservoirs.（2） Compared with large-angle data，smallangledata can delineate the internal architecture of the reservoirs.（3）Frequency domain information can effectivelyidentifyfault connectivityand hydrocarbon connectivity.In China，deep andultra-deep fracture-cavity reservoirs are typically explored by adopting large-array acquisition，which provides favorable angle-domain data conditions. The proposed method can serve as a reference for application in similar exploration areas.

Keywords： angle domain，coherence，dominant frequency，time-frequency spectrum，fracture-cavity reservoir，ultra-deep layer，internal architecture，reservoir description

桂志鹏，张军华，张银涛，等，利用角度域信息精细识别深层碳酸盐岩缝洞型储层[J].石油地球物理勘探， 2025，60（4） ：998-1006.

GUI Zhipeng， ZHANG Junhua， ZHANG Yintao，et al. Fine identification of deep carbonate fracture-cavity reservoirs using angle domain information[J]. Oil Geophysical Prospecting，2025，60（4）：998-1006.

0 引言

碳酸盐岩缝洞型储层，或形象地称之为断溶体，是碳酸盐岩地层在近直立走滑断层作用下，产生断层或裂缝，后经溶蚀、充填、上覆地层压实、深埋等作用，形成的以走滑断层、裂缝、溶洞、孔洞、暗河等若干地质要素组合的特殊碳酸盐岩储层[1]。（剩余11314字）