塔西南坳陷下奥陶统风化壳中地开石的发现及其意义  

Discovery of Dickite and Its Significance in Weathering Crust of Lower Ordovician, Southwest Depression in Tarim Basin

作　　者：赵杏媛[1] 

机构地区：[1]塔里木石油勘探开发指挥部勘探研究中心,新疆库尔勒841000

出　　处：《新疆石油地质》1997年第4期307-312,共6页Xinjiang Petroleum Geology

摘　　要：地开石发育状况直接反映了地开石形成时储集层溶蚀孔隙发育、连通程度和上覆地层的温度条件,因而研究地开石对油气勘探有着重要的意义.我国仅在陕甘宁盆地、塔里木盆地下奥陶统风化壳白云岩溶蚀孔中发现地开石,塔里木盆地地开石的发现表明,塔里木盆地西部,尤其是巴楚—麦盖提地区的下奥陶统风化壳是寻找天然气聚集的最有利地区.Dickite were only found in dolomite denudation pore in weathering crust (Lower Ordovi-cian) in Shaanxi-Gansu-Ningxia and Tarim basins. Developing state of dickite directly reflects development and connectivity of denudation pore when it is formed and temperature condition of overlyingformation, so studying dickite is very important to oil/ gas exploration. Discovery of dickite in Tarimbasin indicates that Lower Ordovician weathering crusts in western Tarim basin (especially in Bachu -Maigaiti) are the most favourable area for gas accumulation.

关 键 词：盆地 早奥陶世 风化壳 天然气 储集层 地开石 

分 类 号：P618.130.2[天文地球—矿床学] P578.94[天文地球—地质学]