沉积规律控制下的测井约束波阻抗反演及其应用

为使反演结果符合地质规律,对多学科综合反演进行了技术实践研究,特别是沉积规律对反演结果的控制作用.以某三维地震工区为例,在资料分析的基础上,以层序地层学为理论依据进行研究区沉积规律分析,并以此规律为指导进行测井曲线处理、子波提取、波阻抗反演参数选取等方面的探讨.通过多学科一体化研究工作,得到了准确反映沉积规律的反演数据体,精确预测出了三角洲前缘浊积有利储集砂体的发育范围、展布方向,为该区滚动勘探开发井位部署提供了重要依据.该研究成果同样适用于其他的砂泥岩沉积地区,尤其适合于各测井资料间差异明显、地震与测井信息间矛盾较大的工区.

Well logging restricted wave impedance inversion and its application under the control of sedimentary rules

Multidisciplinary inversion in technical practice, especially the impact of sedimentary rules on the inversion results has been studied to ensure the inversion results consistent with the geologic rule. Take some 3 D seismic work areas as examples, sedimentary rules in the studied area are analyzed based on data analysis and according to the theory of sequence stratigraphy, under the guidance of which, well log processing, wavelet extraction and wave impendence inversion parameter selection are discussed. Inversion data that could reflect the sedimentary rules precisely has been achieved through the multidisciplinary study, which would predict the exact development range and distribution directions of the favorable accumulating sand bodies in the delta front turbidite, and thus provide an important reference to well deployment in the progressive process of exploration and development. The results are also adaptable to other sand shale deposited areas, especially to the area with obvious differences among logging data and conflicts between logging data and seismic data.