项目名称: 利用核磁共振测井进行页岩气储层评价的理论与方法研究
项目编号: No.41304106
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 高阳
作者单位: 中国石油大学(北京)
项目金额: 25万元
中文摘要: 基于页岩气藏具有低孔低渗、孔隙尺度为纳米级、以受限扩散为主、岩石骨架中分散有机质、气体赋存状态分为游离气、吸附气、溶解气和毛管凝析气等特点,本项目拟运用岩心实验和测井资料分析相结合的方法研究如何利用核磁共振测井对页岩气藏进行评价。通过对页岩岩心进行饱和水和甲烷气体实验来研究和对比已有的几种核磁共振测井观测模式和反演方法,评估它们应用于页岩气储层评价的局限性和影响因素,确定一种或几种适合页岩气储层的观测模式和反演方法。同时确定在页岩气储层下核磁共振测井参数和反演时反演方法等对反演结果的影响。在岩石物理参数计算方面,改进和构造孔隙度模型、渗透率模型、饱和度模型、束缚水模型(包括T2截止值的确定)等,以便将这些模型应用于页岩气藏的核磁共振测井数据处理,能够根据一维的T1谱或T2谱或二维谱定性或者定量的评价页岩储层。
中文关键词: 页岩储层;核磁共振测井;反演方法;储层评价;
英文摘要: Shale gas reservoirs have the following characteristics, very low porosity and permeabilities, tiny pore scale (average shale pore throat diameter of the nano-scale), dispersed organic matter in the rock matrix, restricted diffusion and the gas exists as an adsorbed phase free phase, dissolved phase and capillary condensed phase. This work addresses using NMR logging to evaluate shale gas reservoirs with the data of core experiments and NMR logging. By the water and methane saturated cores data, we compare the determination of the activation set and acquisition parameters while logging and the inverse methods for normal gas reservoirs and try to find out the limitation and influence factors of those, hence, to find the determination of the activation set and acquisition parameters while logging and the inverse methods for shale gas reservoirs and how they influence the inverse results. For the calculation of parameters of petrophysics, we try to form models for porosity, permeability, saturation and bounded water (including T2cutoff) et al. Finally, we use these models in the shale gas NMR logging to evaluate the shale gas reservoirs.
英文关键词: Shale reservoirs;NMR logging;Inversion method;Reservoir evaluation;