ISIS与Voxelgeo储层预测技术
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摘要
ISIS全局优化波阻抗反演与宽带约束反演相比,具有较多的技术优势,该软件使用快速模拟退火的算法、精细的低频随机模型和时变子波,保证了反演结果的可靠性,并能准确的反映储集层的地质涵义。在火北工区井资料较少的情况下,进行的波阻抗反演,有效的展示了目的砂层的沉积展布规律,该项目在利用Voxelgeo软件对常规地震剖面进行解释时,没有获得较大突破,在对火北等工区进行波阻抗反演后,再将阻抗体输入到Voxelgeo中进行重新解释,获得了较大成功,并在火北工区东北部J_2q~2发现一辫状河三角洲叠合的砂体,在J_2s~3发现一辫状河沉积体系。在该沉积异常范围内所布的火北1井具有良好的油气显示,由此而开辟了胜北凹陷西南缘隐蔽油气藏的新领域。
Comparing with wide band constrained inversion, fully optimized wave impedance inversion of ISIS has technical advantages. The software uses high-speed modeling annealing method and fined low frequency random model and time-variable wavelet to make the inversion result reliability and is able to accurately reflect geology concept of reservoir. For the shortage of well data in Huobei block, wave impedance inversion undergone has effectively shown the depositional distribution of target sandstone formation. After wave impedance inversion have done for blocks, for example Huobei, impedance bodies are input Voxelgeo to be reviewed, which obtained great success. Stacked sand body of braided fiver delta was found in J_2q~2 of north-east of Huobei, depositional system of braided river was found in J_2s~3. Huobei Well 1 located in abnormal depositional region showed the clear evidence of oil and gas. Thus new area of subtle reservoir in the edge of south-west of Shenbei depression has been exploited.
Comparing with wide band constrained inversion, fully optimized wave impedance inversion of ISIS has technical advantages. The software uses high-speed modeling annealing method and fined low frequency random model and time-variable wavelet to make the inversion result reliability and is able to accurately reflect geology concept of reservoir. For the shortage of well data in Huobei block, wave impedance inversion undergone has effectively shown the depositional distribution of target sandstone formation. After wave impedance inversion have done for blocks, for example Huobei, impedance bodies are input Voxelgeo to be reviewed, which obtained great success. Stacked sand body of braided fiver delta was found in J_2q~2 of north-east of Huobei, depositional system of braided river was found in J_2s~3. Huobei Well 1 located in abnormal depositional region showed the clear evidence of oil and gas. Thus new area of subtle reservoir in the edge of south-west of Shenbei depression has been exploited.
引文
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