煤炭工程 ›› 2016, Vol. 48 ›› Issue (9): 109-112.doi: 10.11799/ce201609032

• 研究探讨 • 上一篇    下一篇

黔西月亮田矿区YV-1井煤储层孔隙特征研究

高为1,金军1,周效志2,胥帅帅1   

  1. 1. 贵州省煤层气页岩气工程技术研究中心
    2. 中国矿业大学资源与地球科学学院
  • 收稿日期:2016-01-14 修回日期:2016-04-20 出版日期:2016-09-10 发布日期:2016-10-17
  • 通讯作者: 高为 E-mail:404929883@qq.com

Research on Pore Characteristics of Coal Reservoirs in YV-1 well of Yueliangtian Mining Area, Western Guizhou

  • Received:2016-01-14 Revised:2016-04-20 Online:2016-09-10 Published:2016-10-17

摘要: 利用压汞试验和低温氮吸附试验,研究了黔西月亮田矿区YV-1井6个主要煤层煤样的孔隙特征。压汞试验结果表明:该区煤储层孔容和孔隙度均较小,以吸附孔隙为主,具有微孔和小孔发育、大孔较发育、中孔最不发育的双峰结构孔隙特征|各煤层间不同类型孔隙孔容含量及压汞曲线形态相近,渗流孔隙多为具备一定连通能力的开放孔。低温氮吸附试验表明:煤样比表面积较大,有利于煤层气的聚集,但吸附孔隙中存在较多的一端封闭的不透气性孔和墨水瓶状孔,吸附孔之间的连通性较差,不利于煤层气的解吸和开发。

关键词: 煤储层, 孔隙特征, 压汞试验, 低温氮吸附试验, 煤层气

Abstract: By use of mercury intrusion test and low temperature nitrogen absorption test,the pore characteristic of six main seam’s coal samples from the major coal seamYV-1 well in the Yueliangtian mining area,western Guizhou were studied. The mercury injection test results showed that the pore volume and porosity of all the coal reservoirs are low. The pores are dominanted by adsorption pores, and as to the coal reservoirs in the block could have the micropores and transition pores developed, macropores well developed and mesopores most undeveloped double peak structural porosity features.The different types pore would have similar pore volume content and the mercury injection curves are similar for all coal samples.The seepage-flow pores are always characterized by certain connected and mainly open.The low temperature nitrogen adsorption experiment showed that the specific surface area of all the coal reservoirs are large which might be favorable to gas adsorption and accumulation.However,the adsorption pores are mostly comprised of one closed and airtight pores and ink bottle shape hole so that there are poor connections for adsorption pores,it might not be favorable to the desorption and development of the coalbed methane.

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