芦岭井田单煤层产气潜力定量评价

Single Coal Seam Gas Production Potential Quantitative Assessment in Luling Minefield

芦岭井田10号煤煤储层资料缺乏,通过常规方法难以进行产气潜力评价,采用临储压差、临废压差、有效解吸量、不同解吸阶段煤层气解吸效率等指标,建立单煤层产气潜力评价标准,评价10号煤层的产气潜能并通过工程实践进行验证。结果表明,芦岭井田10号煤层的有效解吸量达到了5. 59m^3,具有良好的产气潜能。10号煤层气生产经历快速解吸、敏感解吸两个阶段,最大解吸效率为5. 43～4. 28 m^3/t·MPa,能够达到工业气流的下限标准。

Coal reservoir data of coal No.10 in the Luling minefield are insufficient, thus through conventional methods are difficult to launch gas production potential assessment. Using indices of critical desorption-reservoir pressure difference, critical desorption-abandonment pressure difference, effective desorption volume and desorption efficiency during different desorption stages, have established single coal seam gas production potential assessment criterion. Then assessed coal No.10 gas production potential and carried out verification through engineering practices. The result has shown that the effective desorption volume of coal No.10 can be 5.59 m^3 as high, possesses good gas production potential. The CBM production of coal No.10 can be partitioned into speedy desorption and sensitive desorption two stages. Its maximum desorption efficiency is 5.43~4.28 m^3/t·MPa thus can achieve the lower limit of commercial gas flow.