海陆交互相沉积岩页岩气生储特征——以鲁西南含煤区为例  

Characteristics of Generation and Storage in Marine and Continent Interactive Sedimentary Rocks and Shale Gas——Taking Coal-bearing Area in Southwestern Shandong Province as an Example

作　　者：高兵艳 彭文泉 张春池[3] 胡彩萍 王会韬 GAO Bingyan;PENG Wenquan;ZHANG Chunchi;HU Caiping;WANG Huitao(No.1 Exploration Institute of Geology and Mineral Resources, Shandong Ji'nan 250110, China;Shandong Engineering Laboratory of Rich Iron Ore Exploration Technology Development, Shandong Ji'nan 250110,China;Shandong Institute of Geological Surveying, Shandong Ji'nan 250014,China;Linqu Bureau of Natural Resources and Planning, Shandong Linqu 262600, China)

机构地区：[1]山东省第一地质矿产勘查院,山东济南250110 [2]山东省富铁矿勘查技术开发工程实验室,山东济南250110 [3]山东省地质调查院,山东济南250014 [4]临朐县自然资源和规划局,山东临朐262600

出　　处：《山东国土资源》2022年第2期10-17,共8页Shandong Land and Resources

摘　　要：鲁西南含煤区是山东重要的煤炭生产和储存区,也是山东省古生代海陆交互相沉积岩发育和保存较好的地区之一,本次以石炭二叠纪海陆交互相沉积泥页岩为研究目标,对泥页岩沉积环境和发育特征、有机地化特征、岩石物性特征、含气性特征等方面进行分析研究,发现山西组和太原组是鲁西含煤区海陆交互相沉积岩最为发育层位,暗色泥页岩厚度100~200 m,有机碳含量为0.7%~3.5%,生烃潜量为0.5~6.0 mg/g,以Ⅲ型干酪根为主,镜质体反射率为0.7%~2.0%,脆性矿物主要在30%~60%之间,微裂隙发育,属特低—低页岩气层孔隙度和特低页岩气层空气渗透率,泥页岩解析气量0.15~0.30 m^(3)/t,最大吸附气量为2.33~2.88 m^(3)/t。认为鲁西南含煤区泥页岩具备页岩气形成的物质基础、演化程度、储集空间及压裂脆性条件。The coal-bearing area in southwestern Shandong province is an important coal production and storage area.It is also one of the areas where Paleozoic marine and continent interactive sedimentary rocks developed and preserved well.In this paper,taking Carboniferous-Permian marine and continent interactive sedimentary rocks as the research target,sedimentary environment,development characteristics,organic geochemical characteristics,petrophysical characteristics and gas-bearing characteristics have been analyzed and stuied.It is found that Shanxi formation and Taiyuan formation are the most developed horizon of marine and continent interactive sedimentary rocks in coal-bearing area in western Shandong province.The thickness of dark mud shale is 100~200m,the organic carbon content is 0.7%~3.5%,the potential hydrocarbon generation capacity is 0.5~6.0mg/g,typeⅢkerogen is main component,the vitrinite reflectance is 0.7%~2.0%,the brittle minerals are mainly 30%~60%,and the microfissure are developed.It belongs to the ultra-low—low shale gas layer porosity and the ultra-low shale gas layer air permeability.The dissolved gas volume of mud shale is 0.15~0.30m^(3)/t,and the maximum adsorbed gas capacity is 2.33~2.88m^(3)/t.It is considered that the shale in the coal-bearing area in southwestern Shandong province has the material basis for shale gas formation,evolution degree,reservoir space and fracturing brittleness conditions for shale gas formation.

关 键 词：页岩气 海陆交互相沉积 泥页岩 储层特征 鲁西南含煤区 

分 类 号：P642[天文地球—工程地质学]