一种基于套管井几何因子的电阻率处理方法

• Format: Patent
• Language: Chinese
• Published: 27.06.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

一种基于套管井几何因子的电阻率处理方法，用同一源距相邻深度测量的波形相减得到接收波形差，得到相邻两个深度点所测量地层（区域）的二次场差，进一步得到视电导率差，并且将视电导率和纵向微分几何因子差进行反褶积；首次提出了套管井几何因子差的形状，并从波形差中寻找到合适的几何因子差，运用4个不同源距（0.275m 0.43m 0.6m 0.77m）的接收波形完成还原了地层电导率曲线并且和真实地层电导率曲线进行对比验证，其取倒数便得到了地层电阻率曲线，可以评价剩余油的分布。 The invention provides a resistivity processing method based on the geometrical factor of a cased well. A reception waveform difference is obtained by conducting subtraction on waveforms measured at adjacent depths at the same source distance, a secondary field difference of measured formations (areas) at two adjacent depth points is obtained, an apparent conductivity difference is further obtained, and deconvolution is conducted on the apparent conductivity difference and a vertical differential geometrical factor difference; the shape of the geometrical factor difference of the cased well isput forward for the first time, the appropriate geometrical factor difference is found from the waveform difference, reception waveforms at four different source distances (0.275 m, 0.43 m,