摘要
以钻孔编录为基础查明义马地区上古生界富有机质泥页岩分布特征,利用X衍射、扫描电镜分析、孔渗测试、等温吸附实验等手段,从矿物组成、孔隙结构特征、渗透性和含气性方面展开上古生界页岩气储层特征分析,评价富有机质泥页岩层段生烃条件并优选页岩气有利目标层。研究表明:研究区发育5套富有机质泥页岩层段,平均厚度为7.88~24.80 m,上古生界富有机质泥页岩脆性系数集中分布在40%~60%,纳米-微米级裂缝和粒间-粒内微小孔发育,孔隙度平均2.2%,埋深在1 800 m以浅的富有机质泥页岩渗透率大于0.1×10^(-3)μm^2,吸附气含量为1.15~1.84 m^3/t。优选埋深在600~1 800 m的山2段和山1—太1段为页岩气有利目标层。
The distribution characteristics of organics-rich shale in Upper Paleozoic in Yima area was studied based on drilling and logging data. The reservoir characteristics of the Upper Paleozoic shale,including mineral composition, pore structure characteristics, permeability and gas-bearing property, were analyzed by means of X-ray diffraction, scanning electron microscopy analysis, porosity and permeability testing to evaluate the hydrocarbon generation conditions of the organics-rich shale layers and optimize the favorable target layers for shale gas. The research shows that there are five sets of organics-rich shale layers in upper Paleozoic formation of the study area, their average thickness is 7.88 - 24.80 m,their brittleness coefficient is 40% -60%. The nano-microcracks and intergranular and intragranular micro-pores are developed in the shale layers. The average porosity- of the shale layers is about 2.2% , the permeability of the organics-rich shale whose depth is less than 1 800 m is greater than 0.1 - 10 3 μm2, and their adsorption gas content is 1.15 - 1.84 m3/t. The Shan 2 member and Shan 1 member -Tai 1member shale layers whose depth is in 600 - 1 800 m are selected as the favora- ble target layers for shale gas.
作者
司庆红
司马献章
张超
王善博
曲凯
孙卫志
李中明
SI Qinghong;SIMA Xianzhang;ZHANG Chao;WANG Shanbo;QU Kai;SUN Weizhi;LI Zhongming(Tianjin Geological Survey Center, China Geological Survey,Tianjin 300170, China;No. 1 Institute of Geological ＆ Mineral Resources Survey,Henan Geology ＆ Mineral Exploration Bureau, Luoyang 471000, Henan, China;Geological Suruey Institute of Henan, Zhengzhou 450000, Henan, China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2018年第3期16-22,36,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中国地质调查局公益性地质调查项目"华北地区页岩气(油气)基础地质调查与潜力评价"(12120114020301)
华北中南部非常规能源选区研究(1211302108025-3)
关键词
页岩气
富有机质泥页岩
储层特征
有利目标层
上古生界
义马地区
shale gas
organics-rich shale
reservoir characteristic
favorable target layer
upper Paleozoic
Yima area
