煤层气储层的不同多相流因素对渗透率影响  

The influence of different multiphase flow factors on permeability in coalbed methane reservoirs

作　　者：徐舜 杨菲菲 XU Shun;YANG Feifei(Zhongjin Environmental Technology Co.,Ltd.,Taiyuan 030032,China)

机构地区：[1]中晋环境科技有限公司,山西太原030032

出　　处：《粘接》2024年第11期128-131,共4页Adhesion

基　　金：山西省自然资源厅2020年地质勘查项目(项目编号:晋分采〔2020-00164〕G155-C54)。

摘　　要：针对勘察过程中对气储层渗透率影响因素的分析不够全面。以渗流机理分析结果为基础,分析煤层气储层勘察中不同因素对渗透率影响。以煤层气储层渗流的密度、饱和度与速度特征为基础计算渗透率;以有效围压、气体压力和温度的影响因素为指标,分析煤层气储层不同因素指标对渗透率的影响。实验结果表明,随着有效围压逐渐增大,煤层气储层的渗透率呈现下降趋势,当气体压力大于1 MPa时,渗透率变化程度较为缓慢;15℃下煤层气储层渗透率普遍更高,表明了温度因素可以改变煤层气储层渗流能力。可为煤层气勘探提供科学依据。In view of the incomplete analysis of the influencing factors of gas reservoir permeability in the exploration process,the influence of different factors on the permeability of coalbed methane reservoir was analyzed based on the results of seepage mechanism analysis.The permeability was calculated based on the density,saturation and velocity characteristics of the seepage in the coalbed methane reservoir.Taking the influencing factors of effective confining pressure,gas pressure and temperature as indicators,the influence of different factors on the permeability of coalbed methane reservoir was analyzed.The experimental results showed that as the effective confining pressure gradually increased,the permeability of coalbed methane reservoirs showed a downward trend.When the gas pressure was greater than 1MPa,the degree of permeability change was relatively slow.The permeability of coalbed methane reservoirs was generally higher at 15℃,indicating that temperature factors can change the permeability of coalbed methane reservoirs.It can provide a scientific basis for coalbed methane exploration.

关 键 词：煤层气勘察 储层地质 渗透率 特征分析 影响因素 

分 类 号：TQ547[化学工程—煤化学工程] TD163.1[矿业工程—矿山地质测量]