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  • 拉人玩时时彩的套路:EmphaSeis

    Broadband Vibroseis Sweep

    后一万能码 2期内中 www.qgqx.net EmphaSeisTM intelligently tailors vibroseis sweeps to extend bandwidth while working within the mechanical and hydraulic constraints of the vibrator. These proprietary* customized broadband sweeps can add a combination of low and high frequencies to provide better wave penetration, finer images and improved single- and multi-component reservoir characterization.

    The ability of vibroseis sources to produce a controlled, broadband seismic source wavelet is limited by a range of constraints related to the complex behaviour of the mechanical and hydraulic systems of the vibrator and its coupling.

    EmphaSeis gets the most from any vibrator by using customized sweeps designed to build up energy at low and high frequencies while keeping the vibrator operating well within its capabilities.


    Linear sweep stack and filter panels EmphaSeis stack and filter panels

    Slide to compare

    The raw stack (on the left of the images) and the filter panels (3-7;7-14;14-72 Hz) show that the EmphaSeis sweep increases the low frequency content of the stack without reducing the amount of energy in the rest of the bandwidth. Data courtesy of Khalsa Production Company/ Apache.


    Features:

    • Customizable non-linear broadband vibroseis sweep which can achieve 5 octaves or more 
    • Additional octave or more of low frequencies for better penetration
    • Intelligently designed vibrator-specific proprietary* sweep and sweep tapers accounting for: 
      • Mass stroke constraint 
      • Hydraulic flow constraints 
      • Servo-valve limit

    *Patents Pending

    Benefits:

    • High-resolution broadband images to help resolve thin beds 
    • Better penetration and imaging of deep and shallow targets 
    • Improved reservoir characterization 
    • Improved bandwidth converted wave data for multicomponent analysis

    Case Study

    EmphaSeis was recently deployed in Egypt on an existing vibroseis crew. Using the same equipment and the same sweep length (18 seconds) EmphaSeis was able to deliver an additional octave of low-frequency bandwidth from 4-6 Hz.

    Linear sweep Drive Level


    Drive Level (kN) vs Time (s) of the Linear sweep (6-72 Hz, in blue) and of the  EmphaSeis sweep (4-72 Hz, in green). Note the tapered build-up of the low frequencies on the non-linear EmphaSeis sweep. In this case, the high frequencies were also tapered to reduce vibrations on the gravelly terrain.

    EmphaSeis sweep Drive Level

    The stack images show a subtle increase in the low-frequency energy which is clearly visible on the amplitude spectrum. These low frequencies contribute to the signal recovered from deeper events, improving continuity and coherency for interpretation. They will benefit various processing steps such as statics and noise attenuation and also improve the quality of reservoir models from seismic inversion.

    Amplitude spectrum of the measured ground force

    Comparison of the 18 s sweeps showing amplitude spectra of the measured ground force. EmphaSeis adds an additional octave of bandwidth compared to the conventional linear sweep.

    Onshore - CleanSweep

    CleanSweep

    Leverage the broad frequency content of your data with low frequencies, free of harmonic noise, for more reliable inversion and interpretation.

    Onshore - UltraSeis

    UltraSeis

    Enabling quantitative interpretation with high-quality, high-density and cost-effective seismic. A fully integrated solution for onshore reservoir development.

    Onshore - General Geophysics

    General Geophysics

    Mastering the full spectrum of geophysical techniques to design customized geophysical surveys for a wide range of industries.

    Onshore (Land)

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  • 湖州市残疾人联合会第七次代表大会开幕 2019-04-25
  • 中国资本市场开放出大招 跨境证券投资更便利 2019-04-25
  • 太坏了!傅欢遇“断子绝孙腿” 这动作红牌都不冤 2019-04-17
  • 市民工地发现并机智"抢回" 4件圆明园流散文物终"回家" 2019-04-17
  • 世界杯成中国企业营销升级大战场 2019-04-15
  • 中东部地区将有强降雨 京津冀等地有轻至中度霾 2019-04-11
  • 郑永年:新时代的清醒判断 2019-04-11
  • 让协商民主优势得以充分发挥 2019-04-10
  • 网友给太原市市长留言获回复 共计11条 2019-04-09
  • 尧都区车站街建设社区老党员高德宏同志手抄“党章”庆党生 2019-04-09
  • 正心正念 爱国爱教 佛界楷模 2019-04-02
  • 防治土地荒漠化 新疆保护生态兼顾农民增收 2019-04-02
  • 许倬云作序《现代的历程》:现代人的天问 2019-03-31
  • 证监会:首发审核政策始终没有变化 2019-03-31
  • 2008年全球金融危机之后,为什么金融危机发源地的美国,欧债危机重灾区的欧洲各国股市连续7年走牛,屡创历史新高,唯经济最好的中国股市却连续7年熊冠全球?去年中国 2018-11-17