收稿日期: 2015-04-28
修回日期: 2015-06-02
网络出版日期: 2015-09-10
基金资助
国家重点基础研究发展计划项目(编号:2012CB214705)；中国科学院战略性先导科技专项(B类)(编号:CDB10010300)联合资助.
Tectonic Impact on Reservoir Character of Chongqing and Its Neighbor Area
Received date: 2015-04-28
Revised date: 2015-06-02
Online published: 2015-09-10
重庆及邻区龙马溪组黑色页岩有机质含量高，处于高—过成熟度阶段。在不同构造位置的页岩剖面采集样品并进行了相关地球化学和矿物组成分析，通过孔隙度及氮气吸附解吸实验研究页岩的储集空间特征。结果表明页岩储集空间主要受构造作用控制，同断层发育的部位相比，构造相对稳定的良村剖面及漆辽剖面具有明显偏高的孔隙度及1.7～300nm孔体积。脆性矿物含量越高，绿泥石含量越低，越有利于储集空间的保存，有机质丰度与储集空间的关系不明显。页岩BET比表面积及t-Plot微孔比表面积与有机质丰度呈明显的正相关关系，与绿泥石含量呈明显的负相关关系，说明有机质孔对比表面积的贡献最大，绿泥石对孔隙有明显的封堵作用。构造作用对页岩比表面积的影响不明显。
李恒超，刘大永，彭平安，王庆涛 . 构造作用对重庆及邻区龙马溪组页岩储集空间特征的影响[J]. 天然气地球科学, 2015 , 26(9) : 1705 -1711 . DOI: 10.11764/j.issn.1672-1926.2015.09.1705
Longmaxi Formation shales in Chongqing and its neighbor area have high TOC values and are over-mature.Samples at different tectonic locations in the study area were selected,and their geochemistry,mineral components and reservoir character were investigated.The result suggests tectonic character is the main controlling factor on the shale reservoir space.Shales collected at Liangcun and Qiliao profiles that located at stable tectonic zone have higher porosity and 1.7-300nm pore volume compared with shales from active tectonic zones.Also,high brittle mineral and low chlorite contents are beneficial to shale reservoir space.The abundance of organic matter shows little relation to reservoir space.BET specific surface area and t-Plot micropore area show positive correlation with the abundance of organic matter,and show negative correlation with the content of chlorite,and the result suggests the surface area of shale is mostly composed of organic pores,and chlorite shows apparent block effect on reservoir space.The result also suggests tectonic impact shows little influence on shale surface area.
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