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

Abstract

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

CLC Number:

P618.13

Jiao Cunli, He Bizhu, Xing Xiujuan and Liu Shilin. Characteristics and Controlling Factors of Palaeo-karstification in Middle Caledonian in Tazhong Area[J]. China Petroleum Exploration, 2010, 15(1): 21-26,2,1.

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

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