基于模式识别的钻头选型新方法

发布时间：2019-02-28 14:13

【摘要】：针对目前钻井过程中因钻头选型不合理、钻头与所钻地层不匹配,导致钻头使用效果差的问题,建立了一种基于模式识别的钻头选型新方法。利用模式识别理论,对已钻井地层及使用的钻头进行聚类分析,建立了地层-钻头标准模式,然后利用K-NN算法对待钻地层进行识别归类,通过地层-钻头标准模式即可选出最佳钻头。该方法在青海油田东坪、牛东区块的2口井中进行了钻头选型现场试验,给出了钻头优选方案,实钻数据表明,与未使用推荐钻头的邻井相比,2口井的钻速和进尺都有了很大提高,提速效果明显。研究结果表明,基于模式识别的钻头选型新方法既考虑了地层多种抗钻特性参数,又考虑了钻头使用效果,钻头优选方案更合理,可以更好地实现钻井提速提效的目的。
[Abstract]:Aiming at the problem that the bit selection is not reasonable in the current drilling process, the bit is not matched with the drilled formation, the use effect of the drill bit is poor, and a new method for selecting the drill bit based on the pattern recognition is established. Based on the pattern recognition theory, a cluster analysis of the drilled formation and the used drill bit is carried out, and the formation-bit standard mode is established, and then the drill formation is identified and classified by the K-NN algorithm, and the best drill bit can be selected through the formation-bit standard mode. According to the method, the field test of bit selection is carried out in the 2 well of Dongping and cattle east block of Qinghai Oilfield, and the preferred scheme of the drill bit is given. The actual drilling data shows that the drilling speed and the footage of the two wells are greatly improved compared with the adjacent wells without the recommended drill bit, and the speed-raising effect is obvious. The results show that the new method of the bit selection based on pattern recognition has both considered the parameters of various drill-and-drill characteristics of the formation, and also considered the use effect of the bit, and the preferred scheme of the drill bit is more reasonable, and the purpose of improving the speed and efficiency of the drilling can be better realized.
【作者单位】：中国石油大学(华东)石油工程学院;
【基金】：国家科技重大专项“薄互层低渗透油藏水平井优快钻井技术”子课题“薄互层水平井导向PDC钻头优化设计及导向特性研究”(编号:2011ZX05051)资助
【分类号】：TE921.1

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