摘要
涠洲6-12油田涠二段储层含油层系多,单砂体厚度变化大,受地震资料品质限制,常规地震储层预测技术难以识别该区薄砂岩储层。基于储层空间的相变特征和测井响应特征,优选谱蓝化技术进行地震资料的拓频处理,拓展该区地震资料频带范围,进而通过波形指示反演技术对同类样本井进行多尺度分析,对高频信息采用波形指示进行插值,使高频部分逐步确定。通过拓频技术的使用,将地震频带从原始数据的12~65 Hz扩展到5~70 Hz。对地震频带限制的突破,实现了对横向岩性变化点和尖灭点的精确刻画,实现了对大于4 m的薄层砂岩的有效刻画。通过岩性和阻抗分布的空间约束,清晰刻画了砂体空间变化。盲井检验结果表明,该方法预测砂体吻合度高达85%。为涠洲油田薄互层砂岩储层勘探开发提供技术支撑。
There are many oil-bearing series in Wei-2 member of Weizhou 6-12 Oilfield,and the thickness of single sand body varies greatly.Due to the limitation of seismic data quality,conventional seismic reservoir prediction technology is difficult to identify thin sandstone reservoirs in this area.Fully considering the phase change characteristics and logging response characteristics of reservoir space,the frequency range of seismic data in this area is effectively expanded based on waveform indication and spectral blueness,the resolution of seismic data is improved,the seismic frequency band is widened from 12~65 Hz to 5~70 Hz,and the thin sandstone greater than 4 m is effectively characterized.The accurate characterization of transverse lithology change points and pinch out points is realized by breaking through the limitation of seismic frequency band.The spatial variation of porosity in sand body is clearly described through the spatial constrains of lithology and impedance distribution.The blind well test results show that the coincidence degree of sand body recognition by this method is as high as 85%,which provides technical support for the exploration and development of thin interbedded sandstone reservoir in Weizhou oilfield.
作者
张益
魏峰
查玉强
袁丙龙
隋波
张宇航
ZHANG Yi;WEI Feng;ZHA Yuqiang;YUAN Binglong;SUI Bo;ZHANG Yuhang(College of Petroleum Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,China;Development Business Department,Zhanjiang Branch of CNOOC(China)Co.,Ltd.,Zhanjiang,Guangdong 524000,China;Exploration and Development Research Institute,Hainan Branch of CNOOC(China)Co.,Ltd.,Haikou,Hainan 570100,China;College of Earth Science and Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2023年第2期25-34,共10页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
陕西省重点研发计划项目(2023-YBGY-316)。
关键词
波形指示
薄互层砂岩储层
地震拓频技术
谱蓝化
空间约束
waveform indication
thin interbedded sandstone reservoir
frequency extension and frequency lifting processing technology
spectral blue
spatial constraints
