沁水盆地目前有多家企业在进行煤层气开采。大部分单井已进入稳产期，随着单

沁水盆地目前有多家企业在进行煤层气开采。大部分单井已进入稳产期，随着单井的不断开采，部分井逐渐进入了衰退期。低效井具有产气量低、套压低、流压低等三低的生产特征且尤为凸显，气量直线下降。同时，随着煤矿的开采，越来越多的井区将受到煤矿影响，气量将大幅度降低，甚至不产气。煤层气地面排采通过地面钻井至开发煤层，经过排水-降压-解吸几个阶段开始产气。在多年的开发过程中发现一个现象，在距离煤矿开采工作面一定距离内的井一般都高产（3000m3/d以上），而当距离太近时反而会快速衰减甚至不产气。因此，需要在煤矿开采接近地面开采井之前采取措施尽可能的多采出煤层气，既能提高经济效益，又能降低煤矿瓦斯突出的风险。目前沁水盆地受煤矿影响井区主要集中在郑村区块，想要明确降压排采对产气量的影响，应当首先确定需要实施的单井。为了解单井产气量对管网压力敏感性，揭示不同管网压力等级下单井产气量的变化规律。

沁水盆地目前有多家企业在进行煤层气开采。 大部分单井已进入稳产期，随着单井的不断开采，部分井逐渐进入了衰退期。 低效井具有产气量低、套压低、流压低等三低的生产特征且尤为凸显，气量直线下降。 同时，随着煤矿的开采，越来越多的井区将受到煤矿影响，气量将大幅度降低，甚至不产气。 煤层气地面排采通过地面钻井至开发煤层，经过排水-降压-解吸几个阶段开始产气。 在多年的开发过程中发现一个现象，在距离煤矿开采工作面一定距离内的井一般都高产（3000m3/d以上），而当距离太近时反而会快速衰减甚至不产气。 因此，需要在煤矿开采接近地面开采井之前采取措施尽可能的多采出煤层气，既能提高经济效益，又能降低煤矿瓦斯突出的风险。 目前沁水盆地受煤矿影响井区主要集中在郑村区块，想要明确降压排采对产气量的影响，应当首先确定需要实施的单井。 为了解单井产气量对管网压力敏感性，揭示不同管网压力等级下单井产气量的变化规律。

At present, there are many enterprises in Qinshui Basin in coalbed methane exploitation. Most of the single wells have entered the stable production period, with the continuous exploitation of single wells, some wells have gradually entered the decline period. Low efficiency wells have the characteristics of low gas production, low casing pressure and low flow pressure, which is particularly prominent, and the gas volume is plummeting. At the same time, with the exploitation of coal mine, more and more well areas will be affected by coal mine, gas volume will be greatly reduced, even no gas will be produced. The surface drainage of coalbed methane is from surface drilling to development of coalbed, and the gas production starts after several stages of drainage, depressurization and desorption. In the development process of many years, it is found that the wells within a certain distance from the coal mining face are generally high-yield (more than 3000m3 / D), but when the distance is too close, it will quickly decline or even not produce gas. Therefore, it is necessary to take measures to extract coalbed methane as much as possible before the coal mining is close to the surface mining well, which can not only improve the economic benefits, but also reduce the risk of coal mine gas outburst. At present, the coal mine affected well areas in Qinshui Basin are mainly concentrated in Zhengcun block. In order to determine the impact of depressurization and drainage on gas production, we should first determine the single wells that need to be implemented. In order to understand the sensitivity of gas production of a single well to the pressure of the pipe network and reveal the variation law of gas production of a single well in different pipe network pressure grades.<br>