平山湖矿区煤储层及含气特征分析  

Analysis of Coal Reservoir and Gas-bearing Characteristics in Pingshanhu Mining Area

作　　者：琚惠姣 田步令 JU Huijiao;TIAN Buling(Gansu Provincial Coal Geological Exploration Institute,Lanzhou 730000,China)

机构地区：[1]甘肃煤炭地质勘查院,兰州730000

出　　处：《煤炭技术》2022年第7期76-78,共3页Coal Technology

基　　金：甘肃省基础地质调查项目(甘资勘发[2019]129号)。

摘　　要：通过三维地震、煤层气参数井和探井资料,结合钻孔煤质测试数据,从煤层、煤岩煤质、渗透性、储层压力、等温吸附性和含气性等方面对平山湖矿区的煤储层地质特征和煤层气含量进行了系统分析。研究结果表明,矿区内煤层具有厚度大,变质程度较低,渗透率低,储层压力较低,Langmuir体积较大,Langmuir压力较高的特点。矿区内煤层气含量低,为0.06~0.14 m3/t,主要是因为矿区内断层较多,破坏了煤层和围岩的完整性,而张拉性正断层使煤层气极易于释放,从而不利于煤层气的保存。Through three-dimensional earthquake,coal seam gas parameter well and exploration data,and drilling coal quality test data,the coal reservoir and the coal quality,permeability,reservoir pressure,isothermal adsorption and gas content.The results show that the coal seam is characteristic of large thickness,low deterioration degree,low permeability,low reservoir pressure,large Langmuir volume and high Langmuir pressure.Coalbed methane content in the mine is low and 0.06~0.14 m3/t,mainly because there are many faults in the mine that destroy the integrity of coal seam and surrounding rock,and tensioning positive fault makes coal seam gas extremely easy to release,which is not conducive to the preservation of coalbed methane.

关 键 词：平山湖矿区 煤储层特征 煤层气 

分 类 号：P618[天文地球—矿床学]