不同含气砂岩的AVO响应类型及其近似式误差分析

发布时间：2018-04-21 09:46

  本文选题：AVO技术 + Zoeppritz方程　； 参考：《岩性油气藏》2017年05期

【摘要】：针对目前AVO反演技术中普遍使用的Aki-Richards,Shuey和Hilterman近似式,以Zoeppritz方程的精确解为参照,针对4种常见的含气砂岩类型,分别利用3种近似式计算AVO响应,并绘出相对误差随入射角的变化曲线。通过对比与分析发现:Aki-Richards和Shuey近似式计算结果均较Zoeppritz方程精确解误差更小,Hilterman近似式计算结果误差较大;特别是在大角度入射时,Shuey近似式计算结果更为精确、稳定;不同储层条件下,3种近似式的误差百分比不同,曲线特征不一致,整体上3种近似式在第Ⅲ类AVO气藏条件下误差均较小,计算结果的精确度均较高。3种近似式对4种典型含气砂岩类型给出的定量分析结果为优选储层参数反演方法提供了理论依据。
[Abstract]:In view of the Aki-Richard Schi-Shuey and Hilterman approximations commonly used in AVO inversion techniques at present, taking the exact solution of the Zoeppritz equation as the reference, three approximate formulas are used to calculate the AVO response for four common types of gas-bearing sandstone. The curve of relative error with incident angle is given. By comparison and analysis, it is found that the error of the exact solution of the Zoeppritz equation is smaller than that of the Zoeppritz equation, especially when the incident angle is large, the results are more accurate and stable. Under different reservoir conditions, the error percentages of the three approximations are different, and the curve characteristics are not consistent. On the whole, the errors of the three approximations are smaller under the condition of the third type AVO gas reservoir. The accuracy of the calculation results is higher than that of the three approximate formulas. The quantitative analysis results of four typical gas-bearing sandstone types provide a theoretical basis for the optimal reservoir parameter inversion method.
【作者单位】： 中国石油勘探开发研究院油气地球物理研究所;
【基金】：国家重大科技专项课题“低渗、特低渗油气储层相对高产富集区预测技术”(编号:2011ZX05013-001)资助
【分类号】：P618.13;P631.4
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本文编号：1781906