The petrography and reservoir properties of some triassic sandstones of the Northern Irish Sea Basin
The petrography and reservoir properties of some triassic sandstones of the Northern Irish Sea Basin
复制标题
北爱尔兰海盆地部分三叠纪砂岩的岩相学和储层性质
DOI：
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发表时间：
1978
影响因子：
2.7
通讯作者：
J. Ebbern
中科院分区：
文献类型：
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作者：
V. S. Colter;J. Ebbern
在柴郡露头的地层序列中，已将北方爱尔兰海的三叠纪砂岩与绳索测井进行了对比（Colter和巴尔，1975年）。最近对井段的研究证实了这些单元与假定的陆上等效物的岩性相似性。砂岩的孔隙度和渗透率首先与原始粒度有关，特别是泥质含量。叠加在这种主要变化上的是各种成岩现象的影响：（1）切向伊利石涂层;（2）垂直于颗粒表面的片状伊利石;（3）方解石胶结物;（4）压实和压力溶解;（5）石英过度生长。在岩心塞中测得的孔隙度和渗透率与原生结构和这些成岩变化的发生有关。
Triassic sandstones of the Northern Irish Sea have been correlated on wire-line logs with the succession at the outcrop in Cheshire (Colter & Barr 1975). Recent work on well sections confirms the lithological similarities of these units with the supposed onshore equivalents. Porosity and permeability of the sandstones are related in the first place to original grain size, particularly argillaceous content. Superimposed on this primary variation are the effects of various diagenetic phenomena: (1) Tangential illite coatings; (2) Platy illite normal to grain surfaces; (3) Calcite cement; (4) Compaction and pressure solution; (5) Quartz overgrowths. Porosities and permeabilities measured in core plugs have been related to primary textures and to the occurrence of these diagenetic changes.