黄陇煤田低煤阶煤储层孔隙特征及吸附储集性能研究

发布时间：2018-04-23 07:01

本文选题：黄陇煤田 + 低煤阶煤储层　；参考：《煤炭科学技术》2017年05期

【摘要】：为了研究黄陇侏罗纪煤田低煤阶煤煤储层孔隙特征和吸附储集性能,采集了黄陇煤田不同矿区的煤样,利用液氮吸附、扫描电镜和等温吸附试验等测试方法,研究了低煤阶煤储层煤比表面积、孔容特征、孔隙特征、孔径分布特征、微裂隙发育程度及煤样的吸附特征。研究结果表明:黄陇煤田低煤阶煤BET比表面积集中分布在1~5 m~2/g,比表面积较小;BJH孔容分布区间集中在0.003~0.030m L/g,煤孔径分布特征主要以微孔和小孔为主,中孔次之;煤样表面微孔隙发育,Langmuir体积分布在7.95~16.52 m3/t,Langmuir压力分布在1.22~5.77 MPa,吸附能力一般,易解吸。结合以往地勘资料研究认为彬长、焦平及黄陵矿区有利于煤层气的勘探开发。
[Abstract]:In order to study the pore characteristics and adsorption and reservoir properties of low rank coal reservoirs in Jurassic coal field of Huanglong, coal samples from different mining areas of Huanglong coal field were collected and tested by liquid nitrogen adsorption, scanning electron microscope and isothermal adsorption test. The characteristics of specific surface area, pore volume, pore size, pore size distribution, microfracture development and adsorption of coal samples in low rank coal reservoirs are studied. The results show that the BET specific surface area of low rank coal in Huanglong coalfield is concentrated at 1 ~ 5 mg / g, the pore volume distribution range of BJH with smaller specific surface area is 0.003 ~ 0.030 mL / g, and the pore size distribution of coal is mainly micropore and micropore, followed by mesopore; The volume distribution of Langmuir is 7.95 ~ 16.52 m ~ (3 / 3) m ~ (3) / t ~ (-1) Langmuir pressure distribution at 1.22 ~ 5.77 MPa, and its adsorption ability is general, and it is easy to be desorbed. Based on the previous geological prospecting data, it is considered that Binchang, Jiaoping and Huangling mining areas are favorable to the exploration and development of coalbed methane.
【作者单位】：国土资源部煤炭资源勘查与综合利用重点实验室;陕西煤田地质勘查研究院有限公司;
【基金】：国土资源部煤炭资源勘查与综合利用重点实验室自主培育课题资助项目(ZP2013-3) 国家科技重大专项资助项目(2011ZX05034-003) 陕西省科学技术研究发展计划资助项目(2016GY-187)
【分类号】：P618.13;TE311

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