摘要
页岩气是指赋存于富有机质泥页岩及其夹层中,主要以吸附或游离状态残留于盆地内的泥页岩内部,成分以甲烷为主,是一种清洁、高效的能源资源。根据页岩气聚集的机理和地质条件的相似性对比结果认为:中国存在大量富含有机质页岩地层,具有广阔的页岩气藏勘探开发前景;贵州页岩气储层地质条件优越,黔北、黔东一带的牛蹄塘组黑色页岩沉积环境有利,沉积厚度大,页岩中碎屑矿物含量高,平均63.1%,成分主要为石英和长石;页岩中有机碳总量w(TOC)≥2%,成熟度Ro≥2%,孔隙度分布范围1.3%～25.6%,平均8.24%;渗透率2.2×10-3～17.2×10-3μm2,平均8.3×10-3μm2;页岩沉积厚度24～170 m,相关指标显示资源潜力大。作为历史上缺油少气的内陆地区,页岩气资源可持续的勘探开发,对调整贵州及全国的能源供应结构,促进区域经济社会发展,意义重大。
Shale gas, hosted in shale and its dissection, is a kind of clean and efficient energy. The main component of shale gas is marsh gas. Accumulation mechanism and geological conditions of shale gas suggest the shale formation with rich organic abound in China, so the exploration and development of shale gas has wide prospect. Sedimentary environment of the Niutitang black shale formation with the quite thicker sediment in north and east Guizhou Province is favorable to shale gas. Quartz and feldspar are main components of detrital mineral with high contents, averaging 63.1%. Other related indexes, such as TOC≥2%, R≥2%, porosities of 1.3%-25.6% with an average of 8.24%, permeabilities of 2.2 × 10.3-17.2 × 10.3 μm2 with an average of 8.3 × 10-3 μm2, and the sedimentary thickness of 24-170 m, indicate large resource potentiality. There are advantages of abundant resources and close attention by the government on exploiting shale gas in Guizhou Province, where oil or gas is historically lacking. It is therefore very important for the promotion of regional economic and social development and energy structural adjustment of Guizhou Province and China to exploit and develop Guizhou＇s shale gas resource.
出处
《矿物学报》
CAS
CSCD
北大核心
2012年第4期569-575,共7页
Acta Mineralogica Sinica
基金
2012年度贵州财经大学引进人才科研项目
关键词
页岩气
资源潜力
开发思考
贵州
shale gas
resource potential
exploitation
Guizhou
