Application of Fluid Inclusions in the Study of Natural Gas Geology in Ordos Basin

作     者：FAN Ai-ping YANG Ren-chao FENG Qiao LIU Yi-qun HAN Zuo-zhen 

作者机构：Department of Geology Northwest University Xi ＇an Shanxi 710069 China Department of Earth Science and Engineering Shandong University of Science and Technology Qingdao Shandong 266510 China 

出 版 物：《Journal of China University of Mining and Technology》 (中国矿业大学学报（英文版）)

年 卷 期：2006年第16卷第4期

页      面：443-447页

核心收录：

学科分类：0808[工学-电气工程] 081803[工学-地质工程] 08[工学] 0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0827[工学-核科学与技术] 0703[理学-化学] 0802[工学-机械工程] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project 2003CB214603 supported by the Development Plan of the State Key Fundamental Research  China 

主　　题：Ordos basin Permian system fluid inclusion homogenization temperature (HT) natural gas 

摘      要：The new recently demonstrated reserves of oil and gas in the Ordos basin are found at the top of petroliferous basins in China. Gas pools discovered in recent years in the Permian system have become the main natural gas resource in the basin. Therefore, synthetic research on fluid inclusions should be done in order to ascertain the pool-forming stage, the maturity of organic matters and the properties of Paleo-fluids. The main types of fluid inclusions in the Permian system in the basin include brine inclusions, carbon dioxide inclusions and organic inclusions. Homogenization temperatures （HT） of brine inclusions can be divided into four intervals： 66-83 ℃, 86-108 ℃, 112-138 ℃ and 142-153℃. The fluid inclusions in the interval of 112-138 ℃ are much more than that of other intervals, indicating that the second stage of hydrocarbon migration associated with the third temperature interval is the most important stage of gas pool formations. The fluid inclusion has extensive applications in the study of gas geology, not only in ascertaining the formation stage of gas pools, but also in estimating the maturity of organic matter and restoring Paleo-fluids. The result of testing the HT of brine inclusions shows that there are two stages of gas pool formations in the Permian system occurring ＋150 Ma and ±100 Ma. The maturity of organic matter is moderate to high, a conclusion based on the color of fluid inclusions （radiated by fluorescence）. The high salinity of Paleo-fluids of the NaCI-H2O and CaCl2-H2O systems shows good preservation conditions of the Paleo-fluids. Two stages of reservoir filling, high maturity of organic matter and good preservation conditions are factors favorable for the formation and preservation of large-scale gas pools in the Permian system in the Ordos basin.