A METHOD FOR EXTRACTING CHARACTERISTICS OF IMAGE TEXTURE AND IDENTIFYING OF CUTTINGS BY FOURIER TRANSFORM
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摘要: 针对在PDC钻头条件下石油录井过程中的岩屑岩性难以用肉眼识别,以及人工分类速度较慢的问题,该文利用傅立叶周向谱能量法原理,将岩屑图像在频域中按照频率由低到高对周向谱能量进行分级,将各级能量占总能量的比率作为该图像的特征量,然后应用Bayes分类器对其进行分类处理,将所得结果与人工分类结果做比较,并验证了方法的可靠性。实验证明,这种方法能更好的分析岩屑的岩性,对泥岩的分类准确率高达99.44%。Abstract: In the process of logging,it's quite slow for human eyes to identify the cuttings made by the PDC bit.In order to extracting characteristics of cuttings' image texture effectively,using the algorithm of circular Fourier spectral energy,the image's spectral energy in different frequency ranges is classified.Hence the distribution ratio of the spectral energy is calculated and taken as the characteristic.With the basis of the results of artificial identifying,the characteristics of the standard samples are taken as the training characteristics to test the ones of the random samples using Bayes classifier in the identifying process.The reliability of the method is also tested.It proved that the method was relatively good to analyze the character of cuttings with an identifying accuracy 99.44% for mudstone.
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Key words:
- PDC bit /
- cutting logging /
- Fourier transform /
- image texture /
- Bayes classifier /
- identify of cuttings character
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[1] 鲍云杰,高玉凯,石景艳等.岩屑定量描述评价仪的研制[J].测井技术,1999,23(1):68~71 [2] 张社民.细碎岩屑地质录井方法研究[J].河南石油,2004,18(1):14~16 [3] 刘锐娥,孙粉锦,卫孝锋等.鄂尔多斯盆地中东部山2段储集层岩性微观特征差异性的地质意义[J].石油勘探与开发,2005,32(5):56~58 [4] 刘晓,方锡贤,牛书立.PDC 钻头钻进条件下录井方法探讨[J].断块油气田,2002,9(4):26~29 [5] 钱书红,章卸贤.PDC 钻头钻井时对录井的影响及处理方法探讨[J].海洋石油,2003,23(2):78~82 [6] Zhou F F,Shi J Q.Texture feature based on local Fourier transform[J].IEEE International Conference on Image Processing,2001,17(2):610~613 [7] Castalman K R.Digital image processing[M].Englewoo:Prentice Hall,1998 [8] 朱小燕,王松.傅里叶变换在粘连文字图像切分中的应用[J].计算机学报,1999,22(12):1246~1252 [9] 徐贵力,毛罕平.利用傅里叶变换提取图像纹理特征新方法[J].光电工程,2004,11(31):55~58 [10] 张丽霞,赵大宇.一种扩展的朴素贝叶斯分类器改进算法[J].计算机技术与发展,2006,16,(5):28~30 -
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