过套管地层电阻率曲线环境影响校正方法研究  

Study on the environment effect and its correction method for the formation resistivity logging Data through casing

作　　者：谢进庄 杨景海 刘福平[2] 高杰[3] 

机构地区：[1]大庆测试技术服务公司,大庆163453 [2]北京印刷学院,北京102600 [3]中国石油大学资源与信息学院,北京102249

出　　处：《地球物理学进展》2010年第1期258-265,共8页Progress in Geophysics

基　　金：国家自然基金(10705049);北京市自然科学基金(1083011)联合资助

摘　　要：过套管电阻率测井是在金属套管井中测量地层电阻率的一种电法测井技术,其测量结果受套管、层厚/围岩、水泥环等井眼环境因素的影响,所以在进行过套管电阻率测井资料解释时必须进行测井环境影响因素校正.本文在论述过套管电阻率测井原理的基础上,针对大庆油田引进的俄罗斯过套管电阻率测井仪器ECOS,分别考察了层厚/围岩、水泥环对测量结果的响应规律,利用正演模拟方法研制完成了层厚/围岩影响校正图版以及水泥环影响校正图版.在计算机上实现了层厚/围岩、水泥环影响校正的算法,并利用模型算例和测井实例验证了本文方法的合理性.该方法能够减少水泥环的影响,提高层厚小于1.0 m薄层电阻率的测量精度,为过套管电阻率测井资料正确解释提供了保障.Through casing resistivity logging is an electric logging technique measuring formation resistivity through metal casing. The measurement results are affected by borehole environment factors, such as casing, layer thickness/ surrounding rock, cement sheath, so environment effect factors must be corrected in interpretation of through casing resistivity logging data. Based on discussing principle of through casing resistivity logging, aiming at ECOS, through casing resistivity logging tool of Russia that is introduced by Daqing oil field, this paper analyzes the response pattern of measurement results affected by layer thickness/surrounding rock and cement sheath respectively. Correction charts of layer thickness/surrounding rock effect and cement sheath are successful developed. Correction algorithm of layer thickness/surrounding rock and cement sheath are realized, and rationality of suggested method is verified by using model and logging example. This method can reduce the effect of cement sheath and improve resistivity measurement precision of thin layers that thickness is less than 1.0m, and provide guarantee for correct interpretation of through casing resistivity logging data.

关 键 词：过套管电阻率测井 解释图版 环境影响 校正方法 应用 

分 类 号：P631[天文地球—地质矿产勘探]