岩屑污染及真假油气地球化学识别方法——以柴达木盆地北缘YS1井为例  

The geochemical identification method for cutting contaminating level and true or false oil & gas shows——Taking Well YS 1 in Qaidam Basin as an example

作　　者：张居和[1] 张博为[2] 霍秋立[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院 [2]长江大学地球科学学院

出　　处：《录井工程》2011年第1期15-20,75,共6页Mud Logging Engineering

基　　金：国家重点基础发展规划"973"项目"白垩纪古气候变化与陆相大规模烃源岩形成"(编号2006CB701404)

摘　　要：现场地球化学分析技术主要以岩屑和岩心为检测研究对象,往往忽略钻井液对岩屑地球化学分析技术的影响,未能形成配套的钻井液地球化学分析技术。采用钻井液热解和热解气相色谱分析技术,依据对新配制或新加入处理剂钻井液、循环钻井液的动态监测和岩屑、岩心地球化学分析结果,划分了钻井液对岩屑的4个污染级别,据以确定全井不同井段岩屑污染级别、污染值和主要钻井液污染物,为油气勘探现场快速决策建立了一套消除钻井液污染、评价烃源岩岩屑、识别真假油气显示的地球化学方法。The primary objects for geochemical analysis on spot are cuttings and cores,which often neglected the influence of drilling fluids on cutting geochemical analysis technique and thus no matched geochemical analysis technology for drilling fluid was formed.Using drilling fluid pyrolysis and pyrolysis gas chromatography analysis,based on the geochemical analysis result for a newly made or newly prepared drilling fluid which had been added processing agent into,the dynamic monitoring result of circulating the drilling fluid and the results of cuttings and cores geochemical analysis,4 contaminated levels were divided for the drilling fluid on cuttings in order to determine the contaminated levels,contamination values and the main drilling fluid pollutants for the cuttings from different sections of the whole well,thus setting up a set of geochemical methods to eliminate fluid contamination,evaluate source rock cuttings and recognize the true and false oil and gas shows for on-site oil and gas exploration and a quick decision.

关 键 词：钻井液 热解 地球化学录井 热解气相色谱 污染 评价 

分 类 号：TE243[石油与天然气工程—油气井工程]