Injecting carbon dioxide into coal seams for storage is an effective means to solve environmental problems such as the greenhouse effect. A history match study on a case of originally designed multi-well pilot CO₂-ECBM field testing is introduced in this article. Numerical simulations were undertaken to study the primary productions of two existing offset wells, initial production of a newly drilled injection well, followed by two short-term CO₂ injection testing with a post-CO₂ production and a nitrogen slug between them. Through the history match study, a few specific model parameters, which were in no way to be directly measured or hardly interpreted through geophysical monitoring in the case of field scales, were accordingly determined. Parameters include initial reservoir water saturation, coal swelling, and shrinkage strains by the adsorption and desorption of gas components which govern coal cleat porosity and permeability changes, gas sorption time constants, and well skin factors during series of testing periods. The numerical simulations were additionally used to predict afterwards CO₂ storage volume, gaseous CO₂ distribution, and reservoir pressure in the field. Due to CO₂ price doubled up than its budget, meanwhile, hydraulic communication from upper stratum implied a leakage risk, the CO₂ injection was suspended. Available data recorded from this eventual micro-pilot case was worthwhile of being carefully studied. It would contribute to understanding the process of injecting CO₂ into relatively shallow but less saturated low-rank coal seams.

将二氧化碳注入煤层进行存储是解决诸如温室效应之类的环境问题的有效手段。本文介绍了对原设计的多口先导CO ₂ -ECBM现场测试案例的历史匹配研究。进行了数值模拟，以研究两个现有偏移井的主要产量，新钻探的注入井的初始产量，然后进行了两次短期的CO ₂注入测试，以及后CO _2的测试。生产和他们之间的氮弹。通过历史匹配研究，相应地确定了一些特定的模型参数，这些参数决不能直接测量或在田间规模情况下很难通过地球物理监测来解释。参数包括初始气藏水饱和度，煤溶胀和通过气体成分的吸附和解吸引起的收缩应变，这些成分决定了煤层气隙孔隙率和渗透率的变化，气体吸附时间常数以及在一系列测试期间的表皮因子。数值模拟还被用来预测随后的CO ₂储存量，气态CO ₂分布和油田中的储层压力。由于CO ₂价格比预算高出一倍，与此同时，来自上层的水力连通意味着存在泄漏风险，暂停了CO ₂注入。从这个最终的微型飞行员案例中记录的可用数据值得仔细研究。这将有助于理解将CO ₂注入相对较浅但饱和度较低的低煤层煤层中的过程。