补偿中子测井套管井影响校正方法  

Correction for Compensated Neutron Log in Cased Holes

作　　者：何彪 吴寒 林岩栋 孙佩 唐宇 蔡成定 

机构地区：[1]中国石油集团测井有限公司,陕西西安710077

出　　处：《测井技术》2017年第6期748-750,共3页Well Logging Technology

基　　金：中国石油天然气集团公司重大工程技术现场试验项目(2015F-1702);863计划课题(01AA064601)

摘　　要：中国补偿中子套管井测井在测井应用中目前仍不能直接给出测井工程值。通过裸眼井数值模拟及实验验证,确定补偿中子蒙特卡罗数值模拟方法的模型参数。在研究裸眼井井眼影响条件的基础上,进一步研究了补偿中子套管井测井条件下套管及水泥厚度的影响,建立套管、水泥影响因素校正图版。通过校正图版对套管井补偿中子测井曲线进行校正,校正曲线直接给出地层孔隙度值。校正后曲线与裸眼井的测井曲线对比,其结果符合良好。The cased compensated neutron logging（CNL）has not directly provided the logging engineering value in the logging application.The model parameters of the CNL Monte Carlo numerical simulation method are determined by openhole numerical simulation and experiments.Based on studying the openhole borehole influence conditions,the influences of the casing and cement thickness on the compensated neutron logs from cased holes are also investigated and the casing and cement effect factor charts for the cased hole CNL are established.Based on the correction of the cased hole compensated neutron log by the correction chart,the formation porosity value can be directly shown from the corrected cased hole compensated neutron log.Comparing with the openhole logs,it shows the through-casing compensated neutron logging has agood effect and consistency with it.

关 键 词：补偿中子测井 过套管 数值模拟 影响因素 校正 

分 类 号：P631.84[天文地球—地质矿产勘探]