煤田地质与勘探2017，Vol.45Issue(6)：46-53,8.DOI:10.3969/j.issn.1001-1986.2017.06.008
鄂尔多斯盆地延长探区陆相页岩气储层特征
Characteristics of terrestrial shale gas reservoir in Yanchang exploration area of Ordos basin
摘要
Abstract
Taking Yanchang Formation in Yanchang exploration area as an example and combining with the distribution characteristics of continental shale in China,the authors investigated the accumulation conditions and the reservoir characteristics of continental shale gas using many experimental methods,such as organic geochemical analyses,X-ray diffraction(XRD),determination of porosity,scanning electron microscope (SEM),gas adsorption,etc.The results show that the thickness of Yanchang Formation shale in Yanchang exploration area is large (average 50m),the organic carbon content is relatively high(average TOC is 4.86％),the main types of organic matter are type Ⅱ,and the thermal evolution degree of organic matter is of the mature stage(Rran=0.84％～1.1％);the mass fraction of clay minerals is high(21.8％～71.5％,average 47.3％),and the mass fraction of quartz is low (10.8％～44.9％,average 22.3％),brittleness index is relatively small(27.1％～77.2％,average 49.6％),indicating that the shale reservoir is brittle and can be fractured.The porosity of Yanchang Formation shale in Yanchang exploration area is mainly between 1％～3％,and the pore types are diversiform.The intergranular pores and the inner pores are dominant,followed by intergranular pores,microcracks,dissolved pores and the organic pores,which provide reservoir space for the accumulation of shale gas.The gas content of Yanchang Formation shale is between 1.60～6.67 m3/t,showing a better gas generation capability.关键词
陆相页岩气/储层特征/延长组页岩/鄂尔多斯盆地延长探区Key words
continental shale gas/reservoir characteristics/Yanchang Formation shale/Yanchang exploration area, Ordos basin分类
能源科技引用本文复制引用
徐红卫,李贤庆,周宝刚,祁帅,张吉振,杨杰,陈金明,高文杰..鄂尔多斯盆地延长探区陆相页岩气储层特征[J].煤田地质与勘探,2017,45(6):46-53,8.基金项目
国家自然科学基金项目(41572125) （41572125）
国家科技重大专项课题(2016ZX05007-003) （2016ZX05007-003）
国土资源部公益性行业科研专项基金项目(201311022) （201311022）
国家重点基础研究发展计划(973计划)课题(2012CB214702)National Natural Science Foundation of China(41572125) （973计划）
National Science and Technology Major Project(2016ZX05007-003) （2016ZX05007-003）
Ministry of Land and Resources Special Fund for Research in the Public Interest(201311022) （201311022）
The National Basic Research Program of China(973 Program)(2012CB214702) （973 Program）
