热蒸发烃气相色谱不可识别烷烃在东营凹陷油气层含水性判别中的应用探索  

Exploration on the application of unrecognizable alkanes in thermal evaporation hydrocarbon gas chromatography to water content discrimination in hydrocarbon reservoirs of Dongying depression

作　　者：王强 谭文静 WANG Qiang;TAN Wenjing(Shengli Geological Logging Company of Sinopec Matrix Corporation,Dongying,Shandong 257000,China)

机构地区：[1]中石化经纬有限公司胜利地质录井公司

出　　处：《录井工程》2024年第2期1-7,共7页Mud Logging Engineering

摘　　要：热蒸发烃气相色谱分析技术在以往的应用中主要基于正构烷烃的峰型、碳数范围、主峰碳等参数来判定储层特性,而对于与之伴生的异构烷烃等不可识别烷烃的碳数分布特点鲜有研究。以东营凹陷油气层为例,通过试验观察发现,不可识别烷烃数值的大小与油气层的含水性具有一定的相关性。为此,开展了不可识别烷烃与油气层含水性的相关性研究。首先对热蒸发烃气相色谱分析中产生的不可识别烷烃采取分区定名并读取其峰面积,然后进行各个分区峰面积叠加,计算不可识别烷烃总峰面积,最后利用不可识别烷烃总峰面积分别与热蒸发烃定量总峰面积、正构烷烃总峰面积的比值两个参数来辅助进行储层油气水层综合解释评价。现场应用表明,该方法可有效提高储层解释精度。In the previous application of thermal evaporation hydrocarbon gas chromatography analysis technology,the reservoir characteristics were mainly determined based on the peak type,carbon number range,main peak carbon and other parameters of normal paraffin hydrocarbons,while the carbon number distribution characteristics of associated unidentifiable alkanes such as isoalkane were rarely researched.For example,for the oil and gas layers in Dongying depression,it is found through experimental observation that the values of the unidentifiable alkanes have a certain correlation with the water content of the oil and gas layers.Therefore,the correlation between unidentifiable alkanes and water content in oil and gas layers is researched.First,the unidentifiable alkanes generated in thermal evaporation hydrocarbon gas chromatography analysis are partitioned and named,and the peak area is read.Then the individual partition peak area is superimposed to calculate the total peak area of unidentifiable alkanes.Finally,two parameters,the ratio of the total peak area of unidentifiable alkanes to the quantitative total peak area of thermal evaporation hydrocarbon and the ratio of the total peak area of unidentifiable alkanes to the total peak area of normal paraffin hydrocarbons,are used to assist in the comprehensive interpretation and evaluation of reservoir oil,gas,and water layers.Field application shows that this method can effectively improve the interpretation accuracy.

关 键 词：热蒸发烃气相色谱 不可识别烷烃 正构烷烃 油气层 含水性 东营凹陷 

分 类 号：TE132.1[石油与天然气工程—油气勘探]