摘要
油田勘探开发中由于钻井工艺的影响,会出现螺纹状井眼现象,导致测井曲线出现起伏,给储层参数计算及测井解释带来严重影响。分析了螺纹井眼对补偿密度和中子、电法、声波、双感应、阵列感应等测井曲线的影响。根据快速傅里叶变换进行了测井曲线的频谱分析,设计相应的低通滤波器对测井曲线进行滤波处理,使测井曲线上螺纹井眼的影响明显减弱,测井资料得到优化。应用该方法对镇泾油田ZJ××井实际测井资料进行处理,处理结果验证了校正方法的有效性,经过校正的曲线消除了螺纹井眼对测井曲线的影响,能反映地层的真实物理性质。
In the process of oil exploration and development, some boreholes show a corkscrew shape due to the influence of drilling technology. The corkscrew borehole will affect the well logs and the log data will display fluctuations, which causes trouble to the calculation of reservoir parameters and log interpretation. Analyzed is the influence of corkscrew borehole on different logging curves, such as compensated density log and neutron log, electrical log, acoustic log, dual-induction log and array induction log, etc. Based on the fast Fourier transform （FFT） spectrum analysis on the well logs, we use a corresponding low-pass filter for process the log data filtering processing. After frequency domain filtering correction, the influence of corkscrew borehole on the logging curves has been remarkably weakened, and the log curves have been optimized. Practical application in well ZJ28 of Zhenjing oilfield shows that this correction method is effective, the influence of corkscrew borehole on the log curves have been eliminated, and the processed log curves can correctly reflect formation physical properties.
出处
《测井技术》
CAS
CSCD
北大核心
2012年第5期499-503,共5页
Well Logging Technology
关键词
测井解释
螺纹井眼
频域滤波
傅里叶变换
低通滤波
log interpretation, corkscrew borehole, frequency domain filter, Fourier transformalgorithm, low, pass filtering
