变尺度分析技术在裂缝发育强度评价应用中的新认识  

New Knowledge of Rescaled Analysis Technology in the Evaluation of Fracture Development Intensity

作　　者：贾楠[1] 王建强[1] 卢山[2] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069 [2]中国石油勘探开发研究院,北京100083

出　　处：《地下水》2012年第5期147-150,共4页Ground water

基　　金：十二五国家科技重大专项(编号:2011ZX05023-001)

摘　　要：变尺度分析(Rescaled Analysis)技术越来越多地被成功运用到裂缝发育强度评价研究当中。在前人研究认识的基础上,结合不同地区的实际钻井资料,将具有代表性的声波时差测井作为变尺度分析的数据源,对该技术在不同岩性条件下评价裂缝发育强度的实际应用结果进行统计、分析以及逆向验证。结果显示存在一个裂缝发育临界程度,反映在裂缝密度上即存在一个临界值。在该值之上,声波时差曲线的分形维数对裂缝发育强度具有很好地指示效果;反之,两者间并不存在通常理论上人们认为的正相关性。这表明在变尺度分析技术裂缝评价的实际应用过程中,会受母岩自身垂向非均质性"掩盖效应"的影响,应该充分重视之才能取得客观、准确的应用效果。Rescaled Analysis(R/S analysis) technology is increasingly successfully applied to evaluation of fracture development intensity.The paper is based on understanding of previous studies and combining the actual well data from different regions,we use of representative acoustic logging as data source of Rescaled Analysis,and analyze its practical application results of the evaluation of fracture development intensity under different lithological conditions as well as verify reversely.The result shows that there is a critical degree of fracture development,and reflects in the fracture density that there exists a critical value.Above the value,there is a well effect of instruction between the fractal dimension of acoustic log and fracture development intensity,otherwise there is no a theoretical positive correlation of them which people usually think of.This indicates that while applying the Rescaled Analysis technology to evaluate fracture,it will be affected by 'cover-up effect' of rock itself vertical heterogeneity.So we should give full attention to that affect in order to obtain an objective and accurate application results.

关 键 词：分形几何学 变尺度分析 R/S 分形维数 裂缝发育强度 

分 类 号：TE122.2[石油与天然气工程—油气勘探]