Abstract：The response characteristics of small-scale Karst fracture-cavity units in Dengying Formation of the central Sichuan paleo-uplift are not distinct on the seismic profile, which makes the seismic characterization difficult for fracture cavities in Dengying Formation. To strengthen the seismic reflection characteristics and predict the distribution of small-scale fracture cavities, we perform the scattering imaging on the full-azimuth common dip-angle gather with the full-azimuth local angle-domain imaging method. This intensifies the seismic reflection characteristics of small-scale fracture cavities. According to the strong energy spectrum characteristics of the small-scale fracture cavities in the scattering imaging, the energy body attributes are extracted from scattering imaging data for the description of the fracture cavity development cha-racteristics. The following conclusions are obtained:① The full-azimuth local angle-domain imaging method is more effective than the conventional Kirchhoff migration imaging method; ② The scattering imaging data volume can enhance the seismic reflection characteristics of discontinuous geolo-gical bodies and reflect the geological phenomena such as small-scale fracture cavities; ③ With the reservoir in Dengying Formation in the central Sichuan paleo-uplift as an example, the energy body attribute features extracted from the scattering imaging data volume are better than those extracted from the conventional post-stack seismic data in the reflection of the distribution of discontinuous geological bodies such as fracture cavities.
姜晓宇, 宋涛, 甘利灯, 戴晓峰, 丁骞, 周晓越. 散射成像在小尺度缝洞体识别中的应用——以川中古隆起灯影组为例[J]. 石油地球物理勘探, 2022, 57(1): 206-211.
JIANG Xiaoyu, SONG Tao, GAN Lideng, DAI Xiaofeng, DING Qian, ZHOU Xiaoyue. Application of scattering imaging in small-scale fracture cavity recognition: A case study of Dengying Formation in central Sichuan paleo-uplift. Oil Geophysical Prospecting, 2022, 57(1): 206-211.
林煜,李春梅,顾雯,等.深层碳酸盐岩小尺度缝洞储集体地震精细刻画——以四川盆地安岳气田震旦系灯四段为例[J].天然气地球科学,2020,31(12):1792-1801.LIN Yu,LI Chunmei,GU Wen,et al.Seismic fine characterization of deep carbonate fractured-vuggy reservoir:Case study of the 4th Member of Sinian Denying Formation in Anyue Gas Field,Sichuan Basin[J].Natural Gas Geoscience,2020,31(12):1792-1801.
[2]
姜晓宇,宋涛,杜文辉,等.利用广义S变换频谱分解不连续性检测技术预测断溶体油藏[J].石油地球物理勘探,2019,54(6):1324-1328.JIANG Xiaoyu,SONG Tao,DU Wenhui,et al.Fault-karst carbonate reservoir prediction with the spectral decomposition discontinuity detection based on genera-lized S transform[J].Oil Geophysical Prospecting,2019,54(6):1324-1328.
[3]
马乃拜,金圣林,杨瑞召,等.塔里木盆地顺北地区断溶体地震反射特征与识别[J].石油地球物理勘探,2019,54(2):398-403.MA Naibai,JIN Shenglin,YANG Ruizhao,et al.Seismic response characteristics and identification of fault-karst reservoir in Shunbei area,Tarim Basin[J].Oil Geophysical Prospecting,2019,54(2):398-403.
[4]
姚姚,唐文榜.深层碳酸盐岩岩溶风化壳洞缝型油气藏可检测性的理论研究[J].石油球物理勘探,2003,38(6):623-629.YAO Yao,TANG Wenbang.Theoretical study of de-tectable cavern fractured reservoir in weathered Karst of deep carbonatite[J].Oil Geophysical Prospecting,2003,38(6):623-629.
[5]
王小垚,曾联波,魏荷花,等.碳酸盐岩储层缝洞储集体研究进展[J].地球科学进展,2018,33(8):818-832.WANG Xiaoyao,ZENG Lianbo,WEI Hehua,et al.Research progress of the fractured-vuggy reservoir zones in carbonate reservoir[J].Advances in Earth Sciences,2018,33(8):818-832.
[6]
韩东,袁向春,胡向阳.叠后地震储层预测技术在缝洞型储层表征中的应用[J].石油天然气学报,2014,36(9):63-68.HAN Dong,YUAN Xiangchun,HU Xiangyang, et al.The application of reservoir prediction technique based the post-stack seismic data in fracture-cavity reservoir characterization[J].Journal of Oil and Gas Technology,2014,36(9):63-68.
[7]
卢明辉,张才,徐基祥,等.溶洞模型逆散射成像技术[J].石油勘探与开发,2010,37(3):330-337.LU Minghui,ZHANG Cai,XU Jixiang,et al.Inverse-scattering imaging of cavern models[J].Petroleum Exploration and Development,2010,37(3):330-337.
[8]
DE HOOP M V,BLEISTEIN N.Generalized radon transform inversions for reflectivity in anisotropic elastic media[J].Inverse Problems,1997,13(3):669-690.
[9]
AUDEBERT F.Insights into migration in the angle domain[C].SEG Technical Program Expanded Abstracts,2002,21:1188-1191.
KOREN Z,RAVVE I.Full-azimuth subsurface angle domain wavefield decomposition and imaging,Part I:Directional and reflection image gathers[J].Geophy-sics,2011,76(1):S1-S13.
[15]
CHENG J B,WANG T F,WANG C L,et al.Azimuth preserved local angle domain prestack time migration in isotropic,vertical transversely isotropic and azimuthally anisotropic media[J].Geophysics,2012,77(2):S51-S64.
[16]
段鹏飞,程玖兵,陈爱萍,等.TI介质局部角度域高斯束叠前深度偏移成像[J].地球物理学报,2013,56(12):4206-4214.DUAN Pengfei,CHENG Jiubing,CHEN Aiping,et al.Local angle-domain Gaussian beam prestack depth migration in a TI medium[J].Chinese Journal of Geophysics,2013,56(12):4206-4214.
曹彤,王延斌.基于全方位地震成像与叠前反演的裂缝预测技术及应用[J].科学技术与工程,2016,16(34):170-175.CAO Tong,WANG Yanbin.Fracture prediction tech-nology and application based on omnidirectional seismic imaging and prestack inversion[J].Science Technology and Engineering,2016,16(34):170-175.
