低渗气藏储层特征及生产动态研究

Study on Reservoir Characteristics and Production Performance of Low-Permeability Gas Reservoirs

摘要: 随着社会经济的发展，能源供需矛盾日益加深，天然气凭借低污染和高效能等优势，成为全球地下能源开发的热点。低渗气藏在我国能源结构中占据重要地位，其高效开发对保障国家能源安全和实现双碳目标具有重要意义。然而，低渗气藏具有储层物性差和非均质性强的特点，且易发生水侵现象，进而严重降低了天然气采收率。本文以某气田为研究对象，首先通过铸体薄片观察，全直径岩心观察和测井资料分析，阐明了研究区的岩性特征和储集空间类型；对储层岩心进行孔隙度和渗透率实验，明确了储层的强非均质特征。然后，对研究区的生产动态进行分析，厘清了低渗气藏的生产特征，并对不同生产井的动态储量进行计算。

Abstract: With the continuous socio-economic development, the contradiction between energy supply and demand has become increasingly pronounced. Natural gas, owing to its advantages such as low pollution and high efficiency, has become a focal point in global subsurface energy development. Low-permeability gas reservoirs hold a significant position in China’s energy structure, and their efficient development is of great importance for ensuring national energy security and achieving the dual-carbon goals. However, these reservoirs are characterized by poor physical properties, strong heterogeneity, and a high susceptibility to water invasion, which severely reduces natural gas recovery. This study takes a gas field as the research subject. First, through cast thin section observation, full-diameter core analysis, and well-logging data interpretation, the lithological characteristics and types of reservoir space in the study area are clarified. Porosity and permeability experiments conducted on reservoir cores reveal the strongly heterogeneous nature of the reservoir. Then, by analyzing the production performance of the study area, the production characteristics of the low-permeability gas reservoir are identified, and the dynamic reserves of different production wells are calculated.