摘要
煤层气作为一种清洁能源,越来越受到人们的重视。沁水盆地是中国一个重要的含煤盆地,同时含有丰富的煤层气资源,是我国重要的煤层气产业基地。研究区煤层发育良好,分布广泛,可采和局部可采煤层4层,可采煤厚平均厚度10.86m。煤岩有机显微组分均以镜质组为主,惰质组次之,利于煤层气产生。研究区3^(#)煤层储层处于正常地温区,储层整体处于欠压状态,煤储层压力受煤层埋藏深度影响显著,煤储层压力随着煤层埋藏深度的增加而增大,煤层属低渗透率储层。研究区范围内煤层含气量较高,3^(#)煤煤层测试含气量为5.94~14.19m~3/t,平均12.0m~3/t。该区煤层气井排采数据及矿井瓦斯涌出情况表明,各煤层具有较好的产气能力。通过多参数综合评价,研究区内具备煤层气富集成藏的条件,有开发的潜力。
As a kind of clean energy,coalbed methane(CBM) has been paid more and more attention.Qinshui Basin is an important coal-bearing basin in China,and it also contains rich CBM resources.It is an important CBM industrial base in China.The coal seam in the study area is well developed and widely distributed,with 4 layers of coal seam that can be mined and locally mined,and the average thickness of mineable coal is 10.86 m.Vitrinite is the main organic maceral of coal rocks,followed by inertinite,which is favorable for the generation of CBM.No.3 coal seam in the study area is a normal geothermal area,and the reservoir is in a state of under pressure.The pressure of the coal reservoir is significantly affected by the burial depth of the coal seam,and the pressure of the coal reservoir increases with the increase of the burial depth of the coal seam.The coal seam is a low permeability reservoir.The measured gas content of No.3 coal seam ranges from 5.94 m~3/t to 14.19 m~3/t,with an average of 12.0 m~3/t.The discharge data of CBM wells and the outflow of mine gas in this area show that each coal seams have a good gas production capacity.According to the multi-parameter comprehensive evaluation,the study area has the condition of CBM accumulation and development potential.
作者
姚秋卉
Yao Qiuhui(The Third Exploration Team of Shandong Coalfield Geologic Bureau,Taian,Shandong 271000)
出处
《中国煤炭地质》
2022年第10期19-24,共6页
Coal Geology of China
关键词
煤层气
储层物性
含气性
资源潜力
沁水盆地
coalbed methane
physical properties of reservoir
gas-bearing properties
resource potential
Qinshui Basin
