测井曲线的分形估计方法  

Fractal Evaluation on Logging Curves

作　　者：贺新蔚[1] 马火林[1] 李彬[1] 王德发[1] 谢宗奎[1] 

机构地区：[1]中国地质大学(北京)

出　　处：《石油天然气学报》2005年第1期62-64,共3页Journal of Oil and Gas Technology

摘　　要：测井是地震反演的基础,测井资料的完整性、准确性影响地震反演最后结果的精度和可靠性。在实际工作中,常常遇到同一区块、相同层位的井缺失部分测井数据。解决该问题常见方法是用其他层位曲线间的线性回归关系估计缺失部分的数据,但该方法难以解决由于地层纵向变化产生的测井响应不同。针对这一问题,提出了一种利用分形随机插值估计缺失曲线的方法。应用该方法,利用同一区块、同一层位相邻井的测井曲线插值得到缺失曲线段,并且插值得到的曲线和原始曲线符合较好。Data of well log is the basis for seismic inversion, and the integrality and veracity of well log directly determine the accuracy and reliability of finally seismic inversion. In practice, it usually meets the problem that some wells absent a part of well-log data in the same formation of a studied area. To solve this problem, the general way to estimate the absent part is to use the curves' linear regressioin relationship of other interval of adjacent well, but this method is difficult to avoid the log response changing of different horizons. A new approach of fractal interpolation, which is to estimate the absent data by using the data in adjacent well of the same area or in the same formation, is put forward. The result shows that the estimated curves of the interpolation are in consistant with that of original curves.

关 键 词：测井曲线 分形 估计 分数布朗运动 

分 类 号：P631.4[天文地球—地质矿产勘探]