摘要
在水平井钻进过程中,根据随钻测井信息及时调整地层模型对于优化钻井过程和提高钻井效率至关重要.本文提出一种随钻地层模型自动调整方法.方法根据导眼井测井资料建立初始地层模型并提取地层间测井响应特征.在钻井过程中,对实时测井响应曲线利用小波变换特性进行分层处理,通过综合时间序列多重信息重构测井曲线,然后利用动态时间规整(DTW)下界函数和基于提前终止的fastDTW算法在构建的候选序列数据集中快速搜索最优匹配曲线段,实现水平井和导眼井的地层对比.最后根据地层对比的结果对地层模型做出调整,从而得到地下真实地质结构.应用结果表明,利用本文方法调整后水平道上的实测曲线和模拟曲线的形态趋势变化吻合度高,能够满足随钻地层模型调整的准确性和实时性要求.
In the process of horizontal well drilling,timely adjustment of the stratigraphic model based on Logging While Drilling(LWD)data is crucial for optimizing the drilling process and improving efficiency.In this paper,we propose an automatic adjustment method for the stratigraphic model while drilling.The method establishes an initial geological model based on pilot well logging data and extracts logging response characteristics between formations.During the drilling process,wavelet transform is used to segment the real-time logging response curves.The logging curves are reconstructed by integrating multiple types of information from time series,and then the Dynamic Time Warping(DTW)lower bound function and fastDTW algorithm based on early abandonment are applied to quickly search for the optimal matching segment within the constructed candidate sequence dataset,achieving formation comparison between the horizontal well and the pilot well.Finally,the stratigraphic model is adjusted based on the results of the formation comparison,thereby obtaining the true subsurface geological structure.The application results show that after adjustment using the method proposed in this paper,the morphological trend changes of the measured and simulated curves on the horizontal channel match closely,meeting the accuracy and real-time requirements for stratigraphic model adjustment while drilling.
作者
孙歧峰
郭化敏
岳喜洲
张鹏云
胡成亮
SUN QiFeng;GUO HuaMin;YUE XiZhou;ZHANG PengYun;HU ChengLiang(Qingdao Institute of Software,College of Computer Science and Technology,China University of Petroleum(East China),Qingdao 266580,China;Well-Tech R&D Institute,China Oilfield Services Limited,Beijing 101149,China)
出处
《地球物理学进展》
北大核心
2025年第5期1977-1986,共10页
Progress in Geophysics
基金
国家自然科学基金项目(41930429)资助。
关键词
测井曲线
小波变换
动态时间规整
地层对比
地层模型调整
Logging curve
Wavelet transform
Dynamic Time Warping(DTW)
Stratigraphic correlation
Stratigraphic model adjustment
