珲春盆地煤层气富集控制因素及有利勘探方向  

Controlling Factors of Coalbed Methane Accumulation and Its Favorable Exploration Direction in the Hunchun Basin

作　　者：唐跃[1,2] 杜小弟[2] 张家强[2] 张大权[2] 侯海海[3] 邵龙义[3] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国地质调查局油气资源调查中心,北京100029 [3]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《科学技术与工程》2017年第15期196-201,共6页Science Technology and Engineering

基　　金：国土资源部地质矿产调查评价专项(121201021000161117;1212011220794)资助

摘　　要：东北中低煤阶老工业区是中国煤层气勘探开发重点接替区之一,珲春盆地作为东北新生代古近系含煤盆地,煤层气地质资源总量为29.12×10~8m^3。对该盆地煤层气成藏特征及勘探方向的研究将有力促进我国东北古近系煤盆地煤层气勘探开发。基于煤储层低温氮比表面积和等温吸附实验,认为珲春盆地煤储层孔隙度变化与岩浆热变质作用密切相关,煤储层的微孔隙非常发育,具有较高的比表面积和孔体积,促进了煤层气的吸附和储集作用。结合区域构造、煤层分布、煤储层特征及含气性评价、煤层气保存条件和外部开发条件等方面的分析,指出整体上珲春盆地具有较好的煤层气富集成藏条件,尤以盆地西部八连城、板石和城西地区煤层气成藏条件最好,是今后煤层气勘探开发的目标区。Currently, it is well known that medium-low coal rank area in the northeast is one of CBM strategic relay areas in China. As coal-bearing basin of Paleogene in the northeastern China, Hunchun Basin has plenty of CBM geological resources with total 29.12×10^8m^3. Research on the reservoir formation and exploration orientation will has positive promoting effect on CBM exploration and development of northeastern China. Based on the experi-mental results of N2 adsorption and CH4 isothermal adsorption, the variation of coal reservoir porosity is closed relat-ed to reconstruction of the reservoir by volcanic intrusion. The conditions of adsorption and reservoir would be pro-moted because of high proportion micropore, relative high specific inner surface and pore volume. According to the analysis of regional structure, coal seam distribution, coal reservoir characteristics, gas content, conditions of CBM preservation and external exploitation, CBM enrichment and reservoir forming conditions of Hunchun Basin have advantages on the whole. The favorable areas of Baliancheng, Banshi and Chengxi of Hunchun Basin are target are-as for CBM exploration and development in the near future.

关 键 词：珲春盆地 煤层气 成藏特征 富集规律 勘探方向 

分 类 号：TE132[石油与天然气工程—油气勘探]