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中文摘要：
多井开采技术开发煤层气在我国还处在初步尝试阶段，对该技术的理论研究尚且不足，而数值模拟手段可为煤层气多井试验开采提供一定的理论指导。建立多井开采条件下煤层气的渗流方程，利用有限元方法模拟多井开采煤层气时压力场的变化情况，利用建立的煤层气渗流运动方程研究非线性渗流条件下煤层气速度场的变化情况。总结多井开采条件下煤层气井群渗流场和产气量的变化规律，模拟结果可显示多井开采的优势，并对提高煤层气产量及煤层气工业化开采具有一定的理论指导意义。
英文摘要：
Adoption of multi-well mining technology to exploit coal-bed methane is still under the preliminary trial stage in China. Theoretical research on the multi-well mining technology is also insufficient, fortunately the numerical simulation can be able to provide certain theoretical guidance for coal-bed methane multi-well exploitation. The model of permeable equation considering multi-well exploration conditions is set up; and the pressure field distributions under single well and multi-well exploration conditions are simulated with finite element method. The influence of well space changes on the distribution of pressure field is studied under the well group exploration conditions; and the velocity field of coal-bed methane distribution under nonlinear seepage condition is investigated with the coal-bed methane permeable equation. The conclusions display the change rule of the seepage field and the coal-bed methane production under the multi-well exploitation conditions, and the numerical simulation result demonstrates the superiority of multi-well exploitation. The achieved results can provide significant references to the enhancement of the coal-bed methane output and coal-bed methane industrialization mining.
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