中国石油勘探 ›› 2010, Vol. 15 ›› Issue (1): 21-26,2,1.

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塔中地区奥陶系加里东中期Ⅰ幕古岩溶特征及控制因素研究

焦存礼,何碧竹,邢秀娟,刘士林   

  1. 中国石化石油勘探开发研究院;中国地质科学院
  • 出版日期:2010-02-15 发布日期:2010-02-15

Characteristics and Controlling Factors of Palaeo-karstification in Middle Caledonian in Tazhong Area

Jiao Cunli,He Bizhu,Xing Xiujuan and Liu Shilin   

  1. Jiao Cunli 1,He Bizhu 2,Xing Xiujuan 1,Liu Shilin 1 1.SINOPEC Exploration & Production Research Institute,Beijing 100083;2.Chinese Academy of Geological Sciences,Beijing 100037
  • Online:2010-02-15 Published:2010-02-15

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。

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

Abstract: 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.

Key words: weathered crust, karst, controlling factors, middle Caledonian, Tazhong area, Tarim Basin

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