地震层析成象技术在测井和地面反射资料集中的应用研究

本文以射线的折射和反射定律为基础,采用阻尼最小二乘法（在CT技术中,常称为SIRT算法）和单井单侧多偏移距的反射资料以及地面反射资料,研究反射波层析成象技术对二维弯曲界面的成层结构进行重构的情况。数字模拟试验表明,本文提出的逐层成象方法对透镜体和尖灭地层的成象颇为有效,反演结果对误差扰动是稳定的。 本文所述的成象方法及处理技术可推广到只用地面反射资料进行地层重构的情形。

SEISMOTOMOGRAPHY AND ITS APPLICATION TO RECONS TRUCTION OF 2-D STRUCTURES WITH VSP AND SRP DATA

The purpose of this paper is to study the reconstruction of reflection tomography for two-dimensional layered structures with curved interfaces in the set of single-borehole,one-side,and multi-offset reflection data and surface reflection data.This method is based on the theorem of ray reflection and refraction,and the use of the damped least-squares algorithm,which is usually called the SIRT algorithm in CT.The numerical simulative tests show that the layer-by-layer imaging method proposed in this paper is effective for lens and pinch out structure imaging,and the results of inversion are stable for the perturbation of errors.In addition,the described imaging method and implementation techniques can be applied to stratigraphic reconstruction only by the use of surface reflection data.