现场钻井液滤液碱度测定方法探索  

A Method to Determine Alkalinity of Drilling-fluid Filtrate

作　　者：王娟[1] 何素娟 李磊 卢栎羽[3] 许红川[4] 

机构地区：[1]中国石油川庆钻探工程有限公司钻采工艺技术研究院,四川广汉618300 [2]中国石油川庆钻探工程有限公司川东钻探公司,重庆400021 [3]中国石油西南油气田公司天然气经济研究所,四川成都610051 [4]中国石油西南油气田公司生产运行处,四川成都610051

出　　处：《天然气技术》2010年第3期33-35,共3页NATURAL GAS TECHNOLOGY

摘　　要：钻井液滤液碱度是判断钻井液中氢氧根离子、碳酸根和碳酸氢根离子质量浓度的依据。目前钻井液碱度测定所依据的标准是GB/T16783.1—2006《水基钻井液现场测试》,但在实际操作中,由于钻井液滤液颜色普遍较深,当用甲基橙作指示剂时,终点颜色突变不明显,影响了对滴定终点的正确判断,给实验带来较大误差。针对这一情况,通过室内实验,优选出了更适合钻井液滤液碱度测定的溴甲酚绿指示剂,较好地解决了在钻井液滤液碱度测定过程中滴定终点难以判断的难题,有利于提高测定数据的准确性。Alkalinity of drilling-fluid filtrate is the fundamentalf or determining the concentration of hydroxide ion,carbonate iona nd bicarbonate ion in drilling fluid.At present,alkalinity is determined based on standard:GB/T 16783.1-2006(Field Testing ofW ater-based Drilling Fluid).But in practical operation,whenm ethyl orange is used as an indicator,the endpoint color change isr ather subtle because drilling-fluid filtrate is generally deep in color,and this can influence the correctly determining endpoint of thet itration and bring about large errors.Aiming at this case,a bromocresol green indicator,which is more suitable for alkalinity determining,is optimally selected.It’s difficult to determine the endpoint of titration,but the difficult is solved,which helps enhancet he accuracy of data determination.

关 键 词：钻井液 滤液碱度 指示剂 

分 类 号：TE254.1[石油与天然气工程—油气井工程]