Reservoir Fluid Identification Utilizing the Information of Rock Modulus and Quality Factor
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摘要: 以地震资料为主体的储层流体识别技术对现阶段油气勘探具有重要意义。本文利用岩石模量参数与品质因子作为储层流体指示因子,从提高流体指示因子估算可靠性的角度出发,分别研究了基于弹性阻抗反演的弹性模量参数直接估算方法与基于小波域QVO的品质因子估算方法。岩石模量参数直接估算方法在充分利用弹性阻抗反演高抗噪性与实用性的同时,有效地避免了间接累计误差的影响。品质因子的估算方法基于零相位子波假设,通过对小波域叠前品质因子的归零处理消除叠加平均效应。通过模型试算验证两种方法的流体判识可行性;并且结合实际资料进一步表明岩石模量与品质因子信息的综合应用可以提高储层流体的检测质量。Abstract: The technology of reservoir fluid identification based on seismic data plays an important role in the recent hydrocarbon exploration.Utilizing the rock modulus parameter and quality factor as reservoir fluid indication factor,we research two methods to raise the reliability of estimated fluid indication factor,which are the elastic modulus parameter direct estimation method based on elastic impedance inversion and quality factor estimation method based on the wavelet-domain QVO technology,respectively.Besides taking full advantage of elastic impedance inversion to have high signal-noise-ratio and practicability,the rock modulus direct estimation method can diminish negative effect of accumulative error.Based on the assumption of zero phase wavelet,the quality factor estimation avoids the stack effect using the return-zero process of quality factors estimated from prestack wavelet-domain.The model test shows the viability of the two methods,and real data example illustrates further that the utilization of both information of rock modulus and quality factor can improve the quality of reservoir fluid identification.
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Keywords:
- fluid identification /
- prestack inversion /
- elastic modulus /
- quality factor
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