定量荧光录井污染背景值确定方法  

Methods of determining contamination background value by quantitative fluorescence logging

作　　者：王宇轩[1] 

机构地区：[1]中国石化胜利石油工程有限公司地质录井公司

出　　处：《录井工程》2014年第1期34-36,39,共4页Mud Logging Engineering

摘　　要：在钻井工艺飞速发展的今天,钻井液中混油及荧光添加剂污染的情况时有发生,给传统录井手段增加了困难。定量荧光录井由于其独特的技术优势,已广泛应用于油气勘探领域,经过多年现场实践的检验,在定性识别混油及添加剂污染方面取得了良好的效果。但由于影响因素较多,在混油及添加剂污染识别的实际应用过程中,定量化确定污染背景值还存在一定的难度。为了能够更加有效地识别污染,提高油气显示评价的准确率,结合大量实验分析验证,初步探讨一种切实可行、简单易用的定量化确定污染背景值的方法———模拟替代法,该方法通过采用替代岩屑模拟污染过程,对污染后的替代岩屑进行定量荧光分析,从而得出污染背景值。实践证明采用该方法扣除污染背景值,能够更加有效地识别混油及添加剂污染,还原油气的真实显示。At present,drilling technology is developing rapidly,the contamination of drilling fluid by oil emulsion and additives often happens,therefore the difficulties in traditional mud logging methods are increased.Quantitative fluorescence logging has been widely used in the field of oil and gas exploration due to its unique technical advantages,through the tests of field practice of quantitative fluorescence logging for many years,the good results have been obtained in qualitatively identifying oil emulsion and additive contamination.During the practice of identifying oil emulsion and additive contamination,there was some difficulty in quantitatively determining contamination background value because of many influence factors.In order to more effectively identify contamination and improve the accuracy of evaluating oil and gas shows,combing with test and verification from many experiments,the method,simulated substitution method,was studied initially,which is feasible,easy to use and quantita-tively determines the background value of contamination.By adopting alternative cuttings to simulate the process of contamination,simulated substitution method made quantitative fluorescence analysis to the contaminated alternative cuttings,and got the background value of contamination.After the background value was deducted,this method can effectively identify oil emulsion and additive contamination,and reduce the real oil-gas shows.

关 键 词：定量荧光 混油 添加剂 污染 背景值 

分 类 号：TE142[石油与天然气工程—油气勘探]