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通过分析研究大量的辽河东部凹陷煤储层测井曲线可知,煤层气储层具有低体积密度、高声波时差、高补偿中子值、低自然伽马值、高电阻率值等特征;煤层孔隙度主要受煤的变质程度、埋藏深度、煤层厚度及显微组份等因素的控制。结合前人工作,给出了计算孔隙度和渗透率的方法。利用F-S方法,结合经验公式及达西定律推导得出的理论公式,对一些井进行了处理,得到了煤层处理剖面图。从剖面图上可看出,该区煤层的孔隙度和渗透率都很低,处理的孔隙度结果与测试结果基本吻合;另外,5号井煤层井段的单相注入压降测试结果表明其计算的渗透率也比较准确。
By analyzing a large number of logging curves of coal reservoirs in the eastern depression of Liaohe, coalbed gas reservoirs are characterized by low bulk density, high acoustic time difference, high compensated neutron, low natural gamma ray and high resistivity values. Coalbed pores Degree mainly by the degree of coal deterioration, burial depth, coal seam thickness and microstructure and other factors. Combined with the previous work, a method of calculating porosity and permeability is given. Using the F-S method, combined with the empirical formula and the theoretical formula deduced by Darcy’s law, some wells were treated and the section of coal seam treatment was obtained. It can be seen from the sectional view that the porosity and permeability of the coal seams in this area are very low, and the results of the treatment porosity are in good agreement with the test results. In addition, the single-phase injection pressure drop test results of No. 5 well section indicate that Calculated permeability is also more accurate.