摘要
塔里木盆地加里东中期I幕构造运动形成了塔中地区下奥陶统风化壳古岩溶。该期古岩溶形成于中奥陶世,岩溶发育强度相对较小,岩石物性较差,而分布范围较大;岩溶具有垂向分带、横向似层状分布特征。加里东中期的古地貌、古气候、沉积相带、层序界面、古断裂是控制该期古岩溶发育的主要因素;利用上述指标预测了塔中奥陶系加里东中期Ⅰ幕古岩溶发育的有利区带。
Lower Ordovician weathered crust palaeokarst was formed in Tazhong area due to the middle Caledonian orogeny in Tarim Basin.The palaeokarst was developed in middle Caledonian,and it features in less intensity of corrosion,poor reservoir quality and wide distribution.Vertically,it is distributed by zones,while horizontally in layers.The controlling factors of palaeokarstification in middle Caledonian mainly include palaeogeomorphology,palaeoclimate,sedimentary facies,stratigraphic sequence,and fossil fracture.The prospect areas have been predicted by above mentioned controlling factors.
出处
《中国石油勘探》
CAS
2010年第1期21-26,共6页
China Petroleum Exploration
关键词
风化壳
岩溶
控制因素
加里东中期
塔中地区
塔里木盆地
weathered crust
karst
controlling factors
middle Caledonian
Tazhong area
Tarim Basin
