摘要
在柴达木盆地西部南区发现的沸石主要为方沸石,其呈粒状、块状分布在砂岩粒间孔、裂缝和碳酸盐岩溶蚀孔中。该区的沸石,既能够以交代方式形成,也可以低温—中温热液沉淀方式形成。方沸石交代亮晶方解石胶结物,钠沸石交代石英、长石碎屑颗粒。方沸石交代亮晶方解石,钠沸石胶结物中包裹早期方解石胶结物,说明沸石形成较亮晶方解石晚。呈块状分布的沸石,其发育段都是储层发育段,且多是油气层分布段。
The zeolite found the southern region of West Qaidam Basin is mostly analcime.Grainy and massive zeolite is distributed in sandstone intergranular holes,cracks,and carbonate emposieu.The zeolite in the region can be formed by both metasomasis and mid-low temperature epithermal deposition.Analcime is distributed in sparry calcite cement,while natrolite is in quartz and feldspar clastic particles.Analcime is distributed in sparry calcite and early calcite cement is wrapped in natrolite cement,which shows that the formation of zeolite is later than that of sparry calcite.Massive zeolite is mainly developed in reservoirs,and mostly in oil and gas bearing intervals.
出处
《中国石油勘探》
CAS
2009年第2期46-49,共4页
China Petroleum Exploration
关键词
柴达木盆地
西部南区
沸石类型
分布特征
成因分析
Qaidam Basin
the southern region of West Qaidam Basin
zeolite types
distribution characteristics
contributing factors analysis
