呼图壁地区超深致密砂岩多尺度裂缝地震预测技术  

Seismic Prediction of Ultra-Deep Tight Sandstone Reservoir Fractures inHTB Area, Zhungaer Basin

作　　者：徐亚楠 王晓涛 习宇霄 王贤 叶迪 苏艳丽 Xu Yanan;Wang Xiaotao;Xi Yuxiao;Wang Xian;Ye Di;Su Yanli(Institute of Geophysics,Exploration and Development Research Institute,PetroChina Xinjiang Oilfield Branch,Urumqi,Xinjiang,830000,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理所,新疆乌鲁木齐830013

出　　处：《新疆地质》2024年第1期122-126,共5页Xinjiang Geology

摘　　要：针对呼图壁地区超深致密砂岩不同尺度裂缝预测问题,创新形成基于叠前反演和叠后多属性融合的多尺度裂缝预测方法。据裂缝发育规模,将裂缝划分为大尺度裂缝和小尺度裂缝,其中大尺度裂缝采用叠后地震属性识别,小尺度裂缝成像测井约束反演识别;利用叠后地震数据提取进行机器深度学习、凌乱性检测与曲率增强进行大尺度裂缝检测,将三者结果进行融合以实现大尺度裂缝精细刻画;应用基于OVT域地震数据的叠前方位各向异性属性与叠前反演两种方法进行小尺度裂缝预测;综合大、小尺度裂缝预测结果分析目标区裂缝发育的规律,预测不同尺度裂缝发育有利区。研究结果表明,在呼图壁地区超深储层应用多尺度裂缝地震预测方法获得的预测结果与实测钻孔结果吻合度较高。A seismic fracture prediction method is proposed based on the fusion of multiple prestack and poststack seisimc attributes for predicting the development of tight sandstone reservoir fractures in HTB area in the Zhungaer Basin.The fracutres in the area include both large-scale fracutres that can be identified by seismic responses and small-scale fracutres that can not be readily identified by seismic responses.It is the latter that requires special processing.The geometric seismic attributes related to large-scale fractures are firstly extracted by using the poststack seismic data of high signal-to-noise ratio and then combined with the distribution pattern of the fractures in the target layer characterized with multi-attribute fusion to predict the distribution of small fractures through further combination with frequency-dependent anisotropic parameter inversion.At last,the prediction results are summarized to analyze the fracture distribution pattern of the target layer,with a view to accurately depicting potential targets with well-developed fractures.In all,the actual data obtained are consistent with predicted results,showing that fractured reservoirs can be accurately described by using this integrated multi-scale fracture prediction technology.

关 键 词：致密砂岩储层 多尺度裂缝 呼图壁背斜 OVT域地震数据 裂缝预测 

分 类 号：P631.4[天文地球—地质矿产勘探]