油气化探样品酸解气中甲烷与氢气的相关性研究  

Research on the Correlation between Methane and Hydrogen in Acidhydrolyzed Gases for Geochemical Exploration Samples

作　　者：李忠煜[1] 赵江华[1] 何峻[1] 李艳广 黎卫亮[1] 韩伟[1] LI Zhong-yu, ZHAO Yiang-hua, HE Jun, LI Yan-guang, LI Wei-liang, HAN Wei(Xi＇an Geological Survey Center, China Geological Survey, Xi＇an 710054, Chin)

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《岩矿测试》2018年第3期313-319,共7页Rock and Mineral Analysis

基　　金：中国地质调查局地质调查工作项目"鄂尔多斯及周缘盆地群油气基础地质调查"(21201011000150014)

摘　　要：酸解烃是油气化探方法中准确度相对较高的一项指标,已得到广泛的应用,深入研究酸解气有助于对其机理的进一步解释,并且有利于开发新的分析指标。本文利用气相色谱法测定了油气化探样品经盐酸分解后所得气体中烃类组分与非烃气体组分的含量,发现了酸解气中甲烷与氢气的含量具有正相关性。进而通过X射线荧光光谱和X射线衍射分析样品的元素和矿物组成、样品再粉碎分析以及激光拉曼光谱分析包裹体成分等实验,获得以下结论:(1)酸解气中的甲烷和氢气含量与样品元素组成无关,与碳酸盐矿物正相关,其含量可以反映深部油气的情况;(2)两种气体并不是以物理吸附形式存在于样品中,而是存在于更小的空间内,证明了酸解烃分析方法具有相当高的稳定性;(3)获得了甲烷和氢气同时存在于包裹体的直接证据,由此推测这两种气体可能具有同源性。由于甲烷和氢气含量相关性的存在,酸解脱气中氢气的含量测定有望成为油气化探的新指标,应用于油气资源调查。Acidolysis hydrocarbon is an important index with relatively high accuracy in the geochemical exploration for oil and gas and has been widely used. Detailed study of acid-hydrolyzed gases can help further explain its mechanism and help develop new analytical indicators. The content of acidolysis hydrocarbons and other gas released by hydrochloric acid in the samples from geochemical exploration for oil and gas by Gas Chromatography have been determined,and are presented in this paper. There is a positive correlation between the contents of methane and non hydrocarbon gas. The elements and mineral composition of the sample were measured by X-ray Fluorescence Spectrometry（ XRF） and X-ray Diffraction（ XRD）,respectively,whereas the gas-liquid inclusion composition was analyzed by Laser Raman Spectroscopy after sample smashing. The conclusions are as follows：（ 1） The content of methane and hydrogen in the acidolysis hydrocarbons is independent of the elemental composition of the sample and is positively related to the carbonate minerals. The contents of methane and hydrogen can reflect the situation of deep oil and gas.（ 2） Two kinds of gas do not exist in the form of physical adsorption but in the smaller space. It is proved that the analysis method of acid hydrolysis hydrocarbon has high stability.（ 3） There is direct evidence that two kinds of gases exist in the inclusions at the same time,which infers that two types of gases have the same source. Due to the correlation between methane and hydrogen,the content of hydrogen from acidolysis hydrocarbons will be a new analysis index in the geochemical exploration for oil and gas.

关 键 词：油气化探 酸解烃 包裹体 甲烷 氢气 

分 类 号：O623.11[理学—有机化学] O613.2[理学—化学]