西安石油大学学报（自然科学版）2024，Vol.39Issue(3)：120-127,64,9.DOI:10.3969/j.issn.1673-064X.2024.03.014
水平井瞬变电磁边界远探测数值模拟与响应特征分析
Numerical Simulation and Response Characteristics Analysis Transient Electromagnetic Remote Boundary Detection in Horizontal Wells
摘要
Abstract
In order to overcome the shortcoming of great length of frequency domain electromagnetic induction romote detector,it is pro-posed that transient electromagnetic remote detection method is used for the detection of rock boundary,and an analytical calculation method for the detection response in uniform formation is provided.Based on COMSOL Multiphysics finite element software,a transient electromagnetic remote detection response calculation model for horizontal wells layered formation was established,and its response characteristics in formation interface identification were analyzed.The results show that in the double logarithmic coordinate system,there is a linear attenuation relationship between transient electromagnetic remote detection response and acquisition time in a uniform formation,and the higher the formation resistivity,the faster the response attenuation,and the smaller the collected response value at the same time.In a two-layer formation,the difference between the response of the background strata and the response of the layered strata is defined as the boundary field response.The boundary of the strata will cause local extremum of the boundary field,and the time corre-sponding to this extremum point is closely related to the contrast of the rock resistivity,the distance to the detected boundary and the in-clination angle of the instrument.Increasing the distance between the transmitting and receiving coils can cause the extreme value of the boundary field response to move towards the later time.In a three-layer formation,the transient electromagnetic remote detection re-sponse includes both the upper and lower boundaries of the rock layers,forming two local extremum points in the boundary field re-sponse.The research results have laid a solid foundation for transient electromagnetic remote detection.关键词
瞬变电磁探测/电磁感应测井/有限元/响应特征Key words
transient electromagnetic detection/electromagnetic induction logging/finite element/response characteristics分类
能源科技引用本文复制引用
李宇腾..水平井瞬变电磁边界远探测数值模拟与响应特征分析[J].西安石油大学学报（自然科学版）,2024,39(3):120-127,64,9.基金项目
"十四五"国家重点研发计划项目课题(2023YFC3008903) （2023YFC3008903）
国家自然科学基金面上项目(42274184) （42274184）
陕西省重点研发计划资助项目(2022GY-147,2022GY-151) （2022GY-147,2022GY-151）
中煤科工集团西安研究院有限公司科技创新基金项目(2023XAYJC02) （2023XAYJC02）
