摘要
为分析阵列侧向测井在水平井中偏心影响,根据阵列侧向测井仪工作原理,采用三维有限元算法,建立不同地层模型,分别研究水平井中仪器偏心时层厚和围岩电阻率对阵列侧向测井响应的影响.结果表明,在水平井中仪器偏心时,随着仪器探测深度的增大,层厚和围岩电阻率对仪器视电阻率的影响逐渐增大;偏心距大小对仪器浅探测RLA1视电阻率影响最大,对RLA2～RLA5视电阻率影响相对较小.最后,文章对水平井中仪器偏心时阵列侧向层厚和围岩校正提出了初步校正思路.
To study the eccentric effects of array lateral logging in horizontal wells, a three- dimensional finite element method, based on work principle of array lateral logging and for- mation models, is worked out in this paper. This paper studies the effects of adjacent bed resistivity and thickness on the response of the array lateral logging in horizontal well when the instrument is eccentric. The results show that when the instrument is eccentric in hori- zontal well, effects of layer thickness and adjacent bed resistivity on apparent resistivity is stronger with increase of investigation depth. The size of eccentricity has the greatest im- pact on RLA1 apparent resistivity, and it is relatively small on RLA2-RLA5. In the end, the paper gives preliminary ideas about the correction method.
出处
《工程地球物理学报》
2014年第6期749-756,共8页
Chinese Journal of Engineering Geophysics
基金
中国海洋石油总公司项目(编号:C/KJF-YF09-2010)资助
关键词
水平井
阵列侧向
偏心
层厚
围岩电阻率
horizontal wells
array lateral
eccentric
layer thickness
adjacent bed resistivity
