【摘要】 相位是地震记录的重要属性之一,携带了反射结构信息。基于双反射系数组合和地震子波常相位的假设,推导了新的地震记录相位与地层厚度关系式,并用该式进行薄层厚度的估算。模型测试结果显示,与已有的相位—厚度关系式相比,新关系式规避了相位正切函数存在的奇异点问题,降低了频段不同引起的不稳定性,提高了利用相位属性估算薄层厚度的可行性。实际数据应用结果表明,应用该方法预测的地层厚度与测井解释结果的误差在可控范围内,能够为油气勘探和开发井位的部署提供可靠依据。更多还原

【Abstract】 As one of the important seismic attributes,phase contains reflection structure information.Based on the assumption of the double-reflection coefficient combination and the seismic wavelet constant phase,we derive a new relationship between the phase spectrum and the stratum thickness.And we use this relationship to estimate thin bed thickness.Compared with conventional phase-to-thickness relationship,the new relationship avoids the singularity problem of phase tangent functions,reduces the instability caused by different frequency bands,and improve the feasibility of thin bed thickness estimation with phase spectrum.Real data applications show that thin bed thickness estimated by the proposed approach matches very well with that interpreted on logging data,which provides a good base for the latter exploration deployment.更多还原