原位低温拉曼光谱技术在储层流体包裹体分析中的应用  

Application of In Situ Cryogenic Raman Spectroscopy to Analysis of Fluid Inclusions in Reservoirs

作　　者：陈勇[1,2] 林承焰[1] 于雯泉[3] 郑洁[1] 王爱国[4] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东青岛266555 [2]中国石油天然气集团公司提高石油采收率国家重点实验室,北京100083 [3]中国石化江苏油田分公司地质科学研究院,江苏扬州225009 [4]中国石油大港油田博士后工作站,天津300280

出　　处：《光谱学与光谱分析》2010年第1期95-97,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40772082);国家"863"计划课题项目(2007AA06Z210);山东省自然科学基金项目(Y2008E25);中国石油天然气集团公司石油科技中青年创新基金项目(07E1018)资助

摘　　要：准确获取流体包裹体中盐的类型一直是包裹体研究的重要问题。采用原位低温拉曼光谱技术对民丰洼陷深部天然气储层流体包裹体进行了分析。常温拉曼光谱综合分析表明,包裹体中流体为含甲烷的盐水溶液。在—180℃下对包裹体进行了原位低温拉曼光谱分析,结果显示包裹体中含有NaCl,CaCl_2,MgCl_2等盐类,其中以NaCl为主,CaCl_2含量很少,MgCl_2含量极少。根据沉积成岩过程分析了包裹体中流体的成因,解释了储层成岩作用的机理。研究结果表明,原位低温拉曼光谱是获取储层包裹体中流体性质的一种有效方法。在包裹体原位低温拉曼光谱分析技术基础上,结合沉积成岩过程,可以给储层的成岩作用类型和成岩反应机理给出重要证据。Identification of salts is a principal problem for analysis of fluid inclusions in reservoirs. The fluid inclusions from deep natural gas reservoirs in Minfeng subsag were analyzed by in situ cryogenic Raman spectroscopy. The type of fluid inclusions was identified by Raman spectroscopy at room temperature. The Raman spectra show that the inclusions contain methane-bearing brine aqueous liquids. The fluid inclusions were analyzed at -180℃ by in situ cryogenic Raman spectroscopy. The spectra show that inclusions contain three salts, namely NaCl, CaCl2 and MgCl2. Sodium chloride is most salt component, coexisting with small calcium chloride and little magnesium chloride. The origin of fluids in inclusions was explained by analysis of the process of sedimentation and diagenesis. The mechanism of diagenesis in reservoirs was also given in this paper. The results of this study indicate that in situ cryogenic Raman spectroscopy is an available method to get the composition of fluid inclusions in reservoirs. Based on the analysis of fluid inclusions in reservoirs by in situ cryogenic Raman spectroscopy with combination of the history of sedimentation and diagenesis, the authors can give important evidence for the type and mechanism of diagenesis in reservoirs.

关 键 词：原位低温拉曼光谱 流体包裹体 储层 

分 类 号：O657.3[理学—分析化学] TE122[理学—化学]