The methane sorption capacity of Paleozoic shales from the Sichuan Basin, China
The methane sorption capacity of Paleozoic shales from the Sichuan Basin, China
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DOI：
10.1016/j.marpetgeo.2013.03.007
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发表时间：
2013-06-01
影响因子：
4.2
通讯作者：
Song, Xu
中科院分区：
文献类型：
--
作者：
Wang, Sibo;Song, Zhiguang;Song, Xu
研究了四川盆地古生界页岩对甲烷的吸附性能。初步结果表明，它们在STP下的吸附容量范围为0.94 - 4.29 cm（3）/g（岩石），与巴内特页岩的吸附容量（STP下为1.27-2.41 cm（3）/g（岩石））相当。然而，吸附等温线表明，大多数四川盆地页岩将达到其近似吸附平衡在3-4 MPa，与北美页岩的持续上升的趋势。总有机碳含量与甲烷吸附量之间的正相关关系表明，总有机碳含量是四川页岩甲烷吸附的主要控制因素。这些页岩的粘土矿物含量和吸附能力之间的负相关性可能表明，粘土矿物在这些古生代页岩的甲烷吸附中起着微不足道的作用。吸附容量和变化幅度一般按地质时代排列，即寒武纪<志留纪<二叠纪。(C)2013爱思唯尔有限公司保留所有权利。
The methane sorption capacities of Paleozoic shales from the Sichuan Basin were investigated. The primary results show they have sorption capacities ranging between 0.94 and 4.29 cm(3)/g(Rock) at STP, comparable to the sorption capacity (1.27-2.41 cm(3)/g(Rock) at STP) of Barnett shale. However, the sorption isotherms indicate that most of the Sichuan Basin shales would reach their approximate sorption equilibrium at 3-4 MPa, in contrast to the continuously upward trend of North American shales. A general positive relationship between TOC content and methane sorption capacity indicates that TOC content is the major controlling factor for the methane sorption of the Sichuan shales. A negative relationship between the clay mineral content and the sorption capacity of these shales may suggest that clay minerals play an insignificant role in the methane sorption of these Paleozoic shales. Sorption capacities and variation ranges are generally ordered as to geological age, viz Cambrian < Silurian < Permian. (C) 2013 Elsevier Ltd. All rights reserved.