利用测井资料研究和评价盖层的封闭性能

THE STUDY AND EVALUATION OF THE CONFINING BEHAVIOR OF THE CAPPING BED BY USING WELL LOGGING DATA

本文首先介绍盖层、盖层封堵品质的主要指标、盖层的分级评价及盖层封闭能力的影响因素，然后，用回归分析法找出盖层的地球物理特征与不同条件下的突破压力、渗透率、泥质含量及孔隙度等的相关关系；最后，根据测井资料对盖层进行分级评价。文中以某油田为例，说明利用测井资料研究和评价盖层封闭性能的可行性，并取得较好的地质效果。

in this parer, the author first dealt with the capping bed, the major indices controlling the confining and blocking quality of the caping bed. the grading evaluation of thecapping bed, and the factors affecting the confining capacity of the capping bed. After that,regression analysis was used to find out the correlation between the geophysical characteristics of the capping bed and such factors as breakthrough pressure, permeability, mud contentand porosity under different conditions. Finally, grading evaluation of the capping bed wasperformed on the basis of well logging data.Exemplified by the work in a certain oil field, the present paper points out the feasibilityof applying wall logging data to the study and evaluation of the confining behavior of thecapping bed as well as the fairly good geological effect that can be obtained.