%0 Journal Article
%T Study of influence factor for dual-detector C/O logging in slim holes<br>小井径双源距碳氧比C/O测井的影响因素及处理
%A WU Wen-Sheng
%A FU Geng
%A ZHANG Zhi
%A ZHUANG Ren-Lin Resource
%A Information College in University of Petroleum
%A Beijing
%A China Engineering Physics
%A <br>吴文圣
%A 付赓
%A 张智
%A 庄人遴
%J 地球物理学报
%D 2005
%I 
%X It helps to design scale schemes and interpretation model to study the influence of borehole and formation environments in C/O logging on two detectors. The paper investigates the rules of C/O values changing with borehole diameter, cement thickness, case size, formation porosity , oil saturation, formation lithology and oil density. The results indicate that when a borehole is full of oil, C/O values increase with increasing borehole diameter or case size, and the influence of borehole increases. When a borehole is full of water, C/O values decrease with increasing borehole diameter or case size. C/O values decrease with increasing cement thickness. The higher porosity and water saturation, the higher C/O values when borehole condition is invariable, which is useful for C/O logging. Contrarily, the less porosity and water saturation, the less C/O values, and which is bad for C/O logging. Formation lithology influences seriously C/O values, limestone has higher C/O value than that of sand when other conditions are the same. The higher oil density, the higher C/O value. The paper also introduces a data-processing method that can remove the influence of borehole and formation environment on the two detectors.
%K Slim hole
%K C/O Logging
%K Monte Carlo method<br>小井径
%K 碳氧比测井
%K Monte
%K Carlo方法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=7ACF41D20097E893&yid=2DD7160C83D0ACED&vid=B6DA1AC076E37400&iid=0B39A22176CE99FB&sid=3389C664025A98F9&eid=1A033C02510EFBE6&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=6&reference_num=6