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鄂尔多斯盆地宜川地区煤储层孔隙特征及其分形规律研究
引用本文:孙昌花,唐书恒,万毅,姜文,范二平,张成龙,孙鹏杰.鄂尔多斯盆地宜川地区煤储层孔隙特征及其分形规律研究[J].科学技术与工程,2014,14(1).
作者姓名:孙昌花  唐书恒  万毅  姜文  范二平  张成龙  孙鹏杰
作者单位:中国地质大学北京 能源学院,中国地质大学北京 能源学院,中国地质大学北京 能源学院,湖南省地调院,中国地质大学北京 能源学院,中国地质大学北京 能源学院,中煤地质工程总公司北京大地特勘分公司
基金项目:国家科技重大专项课题(2011ZX05034-003);国家自然科学(41272176)
摘    要:利用Quadrasorb SI自动低温氮吸附仪测试了宜川地区煤储层孔隙特征。实验表明:该区煤储层孔隙类型以微孔为主,且微孔大多为一端封闭的不透气性II类孔,小孔主要以开放型I类孔和"墨水瓶"型孔为主。同时,根据低温氮吸附实验数据,分析了宜川地区煤储层孔隙的分形维数与吸附参数之间的关系。结果表明:分维数D与VL和PL具有一定的相关性,即分维数D与VL和PL在一定程度上呈现正相关关系。宜川地区是深煤层煤层气的重要勘探区,本次研究将对该区煤层气的勘探开发具有重要意义。

关 键 词:宜川地区  煤储层  低温氮吸附试验  孔隙形态  分形维数
收稿时间:2013/7/27 0:00:00
修稿时间:9/2/2013 12:00:00 AM

Research on characteristics of coal reservoir porosity and fractal law in Yichuan area of the Ordos BasinSUN Chang-hua1,TANG Shu-heng1,WAN Yi1,JIANG Wen2,FAN Er-ping1,
Abstract:This paper tests and analyzes the pore character of coal reservoirs in Yichuan area by using Quadrasorb SI Automatic low nitrogen adsorption instrument. The results of this experiment have revealed that the pore types of coal reservoir in this area are mainly microporous. Beside,the microporous is mostly comprised of one closed and airtight type II pores while small pore mainly consist of opend pores of type I and ink bottle shape hole. Moreover,based on the datas of adsorption test of nitrogen in low temperature, the relationship between fractal dimension of pores in Yichuan area and adsorption parameter are analyzed. The results show that fractal dimension D has some relevance with VL and PL,that is fractal dimension D is associated with positive relationship between Langmuir volume and Langmuir pressure to some extent. Yichuan area is a significant exploration area of deep coal seam CBM, thus this research will have an important meaning to the exploration and development of coalbed methane in this area.
Keywords:Yichuan area  coal reservoirs  low temperature nitrogen absorption test  pore morphology  fractal dimension
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