摘要
磁测应力方法是一种可以直接测得钢套管内壁应力分布的新技术。磁测应力信息能够解释套损危险程度和水驱力的方向;套损危险程度与应力检测仪器的信号幅度和发生信号异常的极板数量成正比;应力信号的极性代表套管被挤压或拉伸方向,应力值与信号幅度成正比;由6个极板测量的数据信息构成的平面矢量图对解释分析套管受力方向及其相对大小具有实际意义。根据工程需要提出了视应力值的概念,应当从理论和实验2个方面探索磁测应力仪器的刻度方法,这对该项技术发展完善很重要。
Magnetism-stress logging is a new technology which can directly measure stress-distri- bution of steel casing. The log data can be used to estimate degree of casing damages and direc- tion of waterflood pressure. The degree of casing damage is in direct proportion to the signal am- plitude of the MST- ]I casing stress detector and numbers of polar plates with abnormal signals. The polarity of the stress signal indicates the extruded or stretched direction of the casings. The stress value is directy proportional to the signal amplitude. The plane vector chart with 6 polar plate measuring data may be used to interprete the degree of the casing damages. Imaging pro- cessing of the magnetism-stress logs is a new trend. Calibration methods will be studied in theories and with experiments. A new concept of apparent stress is suggested here.
出处
《测井技术》
CAS
CSCD
北大核心
2012年第1期51-55,共5页
Well Logging Technology
关键词
生产测井
测井解释
套损
磁测应力
视应力
矢量
应力信息成像
production logging, log interpretation, casing damage, magnetism-stress, apparent stress, vector, stress data imaging
