摘要
为了更好地揭示海陆过渡相煤系非常规天然气储层特征,服务于非常规天然气共探共采,以榆社-武乡区块煤系地层为研究对象,开展了地层划分与对比及煤层气、页岩气储层特征研究,对煤系非常规天然气共探共采的可行性进行了探讨。结果表明:研究区主力煤层为山西组3号煤层和太原组15号煤层,煤体结构多为原生结构,孔隙度平均12.34%,3号煤层含气量16.48 m^3/t,15号煤层含气量16.90 m^3/t。泥页岩矿物成分以黏土和石英为主,脆性矿物平均质量分数40.48%,TOC质量分数平均2.04%,镜质体反射率R_0>2.0%。孔隙度平均3.80%,渗透率平均0.078×10^(-3)μm^2,含气量平均0.44 m^3/t。煤层气和页岩气在本区具有共探共采的可行性。
For the purpose of revealing the reservoir characteristics of unconventional natural gases in transitional facies coal measures, serving the co-exploration and concurrent production of unconventional natural gases, taking the coal measures in Yushe-Wuxiang block as an example, stratigraphic division and contrast were carried out, the characteristics of CBM reservoir and shale reservoir are studied, and the feasibility of common exploration and production of the unconventional natural gases in coal measures is analyzed. The research results show that the main coal seam in the study area is No. 3 coal of Shanxi Formation and No. 15 coal of Taiyuan Formation ,most of the coal structure is primary structure ,the average porosity of coal rock is 12.34%. The gas content of No. 3 coal seam and No. 15 coal seam is 16.48 m3/t and 16.90 m3/t separately. The composition of mineral is clay minerals and quartz, the average mass fraction of brittle minerals is 40.48% ,the average mass fracton of TOC is 2.04% ,the vitrinite reflectivity is higher than 2.0% ,the average poros- ity is 12.34% and the average permeability is 0. 078 ×10^-3μm2 ,and the average gas content is 0.44 m3/t. The co-exploration and concurrent production of the coalbed methane and shale gas in this area is feasible.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2017年第3期1-8,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
山西省煤基重点科技攻关项目(编号:MQ2014-02)
关键词
海陆过渡相
煤层气
页岩气
储层特征
共探共采
marine-terrigenous transitional facies
eoalbed methane
shale gas
reservoir characteristics
co-exploration and concurrent production
