文章摘要
陈国栋,魏周拓.利用井中偶极弯曲波反演渗透率的影响因素及灵敏度分析[J].,2014,33(1):35-44
利用井中偶极弯曲波反演渗透率的影响因素及灵敏度分析
Influential Factors and Sensitivity Analysis on Inversion of Permeability by Borehole Dipole Flexural Wave in A Fluid-filled Borehole
投稿时间:2013-08-12  修订日期:2014-01-02
中文摘要:
      本文以各向同性饱和流体孔隙介质充液井孔中声场传播理论为基础,系统考察了影响偶极弯曲波特征的主要因素,分析了快慢地层条件下弯曲波衰减和速度对不同参数的敏感度,对比结果表明,弯曲波的速度基本不受地层渗透率的影响,其衰减对渗透率的敏感性要远高于速度。弯曲波中心频率会随着波的衰减而发生偏移,说明利用弯曲波衰减和频移特征联合反演地层渗透率是可行的。通过对比快慢地层下的灵敏度曲线,发现在慢速地层中反演渗透率的结果应该要好于快速地层。同时,本文也指出在低孔低渗储层中,还可以考虑利用弯曲波衰减识别气层。
英文摘要:
      Based on the wave field propagation theory of the isotropic saturated porous media in a fluid-filled borehole, the effect of different factors on the phase velocity and attenuation of flexural wave was studied systematically. The paper analyzes the sensitivity of flexural wave velocity and attenuation to different factors for fast and slow formation, these contrast results show that flexural wave velocity has basically nothing to do with the influence of formation permeability, its attenuation sensitivity on permeability is far above than that of velocity. Center frequency of flexural wave with attenuation appear frequency shift. So joint inversion of formation permeability is feasible by flexural wave attenuation and frequency shift characteristics. By comparing the sensitivity curve of fast and slow formations, we found that permeability inversion results for slow formation should be better than that of the fast formation. At the same time, this paper also points out that in low porosity and permeability reservoir, gas-bearing reservoir also can be identified by using flexural wave attenuation characteristic.
DOI:10.11684/j.issn.1000-310X.2014.01.006
中文关键词: 弯曲波  渗透率  衰减  影响因素  灵敏度
英文关键词: flexural wave  formation permeability  attenuation  influencing factors  sensitivity
基金项目:
作者单位E-mail
陈国栋 中海油田服务股份有限公司 油田技术事业部 weizhoutuo@163.com 
魏周拓 中国石油大学华东地球科学与技术学院 weizhoutuo@163.com 
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