摘要
流动成像测井属于对非均匀介质动态的非线性测量 ,通过对油气井内多相流体信息的投影扫描和反演处理 ,实时成像显示流体分布及流动状况 .国外研制的电导法、电容法仪器采用电导探针或电容元件构成阵列测量探头 ,分别利用油气与水的导电特性和介电特性差异辨识井内流体 ,对流动截面的测量局限于个别点上 ,已在水平井中见到应用效果 ,但对物场信息投影测量的数据量和分辨率未能满足成像要求 .我国提出的电磁法采用环状阵列电极构成测量探头 ,综合利用油气与水的导电和介电特性差异辨识井内流体 ,可以测量获得多相流体流动截面的清晰图像 。
Flow image logging belongs to the nonlinear survey of inhomogeneous medium dynamics. It can illustrate the fluid distribution and flowing states in images in time by projection scanning and inversion processing on the multiphase fluid information in oil wells. Now the digital entry fluid imaging tool and the multi capacitance flow meter have been developed abroad. The probe arrays are constructed of 4～8 electric needles and 28 rotary capacitors, respectively. It is being applied to measurement of horizontal wells and has some valuable results. However the measurement is only confined on several points. The date amount and resolution can not meet the needs of producing an image. Based on the considerable differences of electric conductivity and dielectric permittivity among oil, gas and water, the electromagnetic wave image logging method with the ring array probes is developed by University of Petroleum (Beijing). The experiment shows that it can measure the cross sectional image of flowing fluid in oil well clearly. This method lays a good foundation for developing a new kind of image logging system.
出处
《地球物理学进展》
CSCD
2002年第2期272-276,共5页
Progress in Geophysics
基金
国家自然科学基金项目 (40 174 0 38)
关键词
油井
多相流动
成像测井
Oil well
Multiphase flow
Image logging
