基于脉冲中子氧活化时间谱的渡越时间解释新模型  

A New Interpretation Model for Transit Time on Impulse Oxygen Activation Logging Data

作　　者：董勇[1,2,3] 吴传生[2] 郭海敏[4] 吕清河[3] 李宏魁[3] 

机构地区：[1]长江大学信息与数学学院,荆州434023 [2]武汉理工大学力学博士后流动站,武汉430063 [3]中原石油勘探局采油工程技术研究院,濮阳457001 [4]油气资源与勘探技术教育部重点试验室(长江大学),武汉430100

出　　处：《科学技术与工程》2015年第34期201-204,共4页Science Technology and Engineering

基　　金：国家自然科学基金项目(61273179);湖北省自然科学基金重点项目(2013CFA053);湖北省教育厅科学技术项目(Q20121216);湖北省教育厅科学研究计划指导性项目(B2015449)资助

摘　　要：针对脉冲中子氧活化时间谱的解释问题,已有的峰形函数拟合解释模型中的峰形函数众多、解释精度偏低,加权平均解释模型解释精度不高。提出了一种间接的谱峰选取方法,并给出了一个新的渡越时间解释模型。首先人工选取背景谱段,然后按照给定的规则确定出多个谱峰段,代入建立的渡越时间解释模型,进而计算出体积流量。实测数据的处理结果表明,该解释模型的解释结果受背景谱段的选取方式影响很小,解释精度比已有模型的解释精度高。There are two existing interpretation model for impulse oxygen activation logging data. The first existing interpretation model is based on function fitting method, but it is difficult to choose a suitable functional forms, and the interpretation accuracy is low. The second existing interpretation model is weighted average model, and its interpretation accuracy is low. An indirect method is presented to choose the peak in time spectrum, and a new interpretation model is given to determine transit time. a bit of background time spectrum is choosen by manual firstly, and then, 5 peak segments are determined in time spectrum secondly. Lastly, the transit time is calculated based on the new interpretation model to determine the volume flow rate. The results generated from the practical data indicate that the new model is efficient and stable.

关 键 词：脉冲中子氧活化测井 时间谱 解释模型 解释精度 

分 类 号：TN911.72[电子电信—通信与信息系统] TE341[电子电信—信息与通信工程]