CAJ | 학술논문

在多煤层发育地区，各煤层组之间发育低渗透岩层，使得上下煤组之间形成独立的多层叠置含煤层气系统。根据相对独立含气系统理论对西山煤田南部赤峪地区的多煤层进行了含气系统的划分，并对储层压力、临界解吸压力等参数进行了分析，在此基础上采用COMET3数值模拟软件进行了单层排采、合层排采和递进排采分析。模拟结果显示：单层排采产量低，经济可采时间短，且成本较高；合层排采比单层排采产量高，经济可采时间长，但各含气系统之间由于相互干扰，贡献不一，使资源浪费；递进排采产气量和稳产时间均优于前两者。可根据产气压力来确定多层叠置含煤层气系统排采次序，首先排采产气压力最高的含气系统，当压力降至压力低的系统时再合排。
재다매층발육지구，각매층조지간발육저삼투암층，사득상하매조지간형성독립적다층첩치함매층기계통。근거상대독립함기계통이론대서산매전남부적욕지구적다매층진행료함기계통적화분，병대저층압력、림계해흡압력등삼수진행료분석，재차기출상채용COMET3수치모의연건진행료단층배채、합층배채화체진배채분석。모의결과현시：단층배채산량저，경제가채시간단，차성본교고；합층배채비단층배채산량고，경제가채시간장，단각함기계통지간유우상호간우，공헌불일，사자원낭비；체진배채산기량화은산시간균우우전량자。가근거산기압력래학정다층첩치함매층기계통배채차서，수선배채산기압력최고적함기계통，당압력강지압력저적계통시재합배。
In multiple coal seams developed area, low permeable strata have existed between coal groups, thus formed independent mul?tiple superimposed CBM systems. Based on the relatively independent CBM system theory has divided CBM systems of multiple coal seams in the Chiyu area, southern Xishan coalfield;analyzed parameters of reservoir pressure, critical desorption pressure etc. On this basis used COMET3 numerical simulation software carried out single layer drainage, multilayer drainage and progressive drainage anal?ysis. The result has shown that the single layer drainage has low yield, short economic recoverable time, and high cost;the multilayer drainage yield is higher, economic recoverable time is longer than single layer drainage, but because of mutual interference exists be?tween methane-bearing systems and different yields made resources waste;the progressive drainage yield and stable production time are all superior to the former two. The drainage sequence of multiple superimposed CBM systems can be based on methane pressure, firstly drain the highest methane pressure CBM system, when the pressure lowering down to the same as low pressure system, then us?ing multilayer drainage.