仪器偏心情况下阵列侧向测井井眼校正图版研制

Development of borehole correction plates for array lateral logging under instrumental eccentricity condition

 倪小威 冯加明 徐观佑 敖旋峰 杨多 刘迪仁

长江大学油气资源与勘探技术教育部重点实验室，湖北 武汉 430100 长江大学地球物理与石油资源学院，湖北 武汉 430100

MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China School of Geophysics and Oil Resources, Yangtze University, Wuhan 430100, China

 运用三维有限元方法模拟了一种阵列侧向测井仪器的井眼响应特性，针对仪器在井眼中的不同偏心程度，研制了对应的井眼校正图版。研究表明：仪器偏心会造成井眼分流能力增强，井眼校正系数变大。相同井径条件下，偏心块越小，井眼校正系数越大；相同偏心块条件下，井径越大，井眼校正系数越大。对于阵列侧向测井5种探测模式而言，探测深度较浅的模式1、模式2受仪器偏心影响较大；模式3、模式4在大井眼条件下受仪器偏心影响较大；探测深度最深的模式5的井眼校正系数基本不随仪器偏心程度的变化而变化。

 The borehole response characteristics of an array lateral well logging tool were simulated by using 3D finite element method. A corresponding borehole correction chart was developed for the different eccentricity of the instrument in the borehole. The research shows that the eccentricity of the instrument will cause the increase of the well splitting ability and the borehole correction factor will become larger; under the same well diameter, the smaller the eccentric block is, the bigger the correction factor is; under the condition of the same eccentric block, the bigger the well diameter is, the bigger the correction factor is. For the five detecting modes of array lateral logging, mode 1 and mode 2, which have lower detection depth, are greatly affected by eccentricity of instrument. Mode 3 and mode 4 in the big borehole are affected greatly by instrument eccentricity; for mode 5 with the deepest detection depth, the correction factor of borehole does not change with the eccentricity of the instrument.

10.6056/dkyqt201804013