论文部分内容阅读
钻井过程中应力的释放引起的机械破碎带具有径向横向各向同性(RTI),其径向特性不同于轴向和切向特性。以频率—轴向波数法为基础建立了数值模型,研究了,该破碎带X~+多极声波全波形测井的影响。谱特性的计算结果表明,在RTI带中,与多极源产生的基本波形与各向同性破碎带的波形一致。在速度较慢的原始地层中,由全波形计算结果可见,RTI破碎
Mechanical fractures caused by the release of stress during drilling have radial transverse isotropy (RTI), which differs from the axial and tangential characteristics by their radial characteristics. Based on the frequency - axial wave number method, a numerical model was established and the effect of full waveform logging of X ~ + multipolar sound wave on the fractured zone was studied. The calculation of the spectral characteristics shows that in the RTI band, the basic waveform generated by the multi-polar source is consistent with that of the isotropic fracture band. In the slower initial formation, the RTI fractures as can be seen from the full waveform calculations