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 in HTB Area,Zhungaer Basin
徐亚楠 1王晓涛 1习宇霄 1王贤 1叶迪 1苏艳丽1
作者信息
- 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
- 折叠
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.
Abstract
A seismic fracture prediction method is proposed based on the fusion of multiple prestack and poststack sei-simc 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 geo-metric 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 da-ta 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Key words
Tight sandstone/Multi-scale fracture/The HTB area/Ovt seismic data/Fracture prediction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据