The Study of Karst Zonation in Yingshan Formation of Lower Ordovician in Xikeer, Xinjiang

Abstract

Abstract:

Recently，people pay more and more attention to karst fractured/caverned reservoir that has been thought as an important oil and gas reservoir in Tarim basin，but the means to predict this kind of reservoir are limited at present. The epi-karst is rich in Xikeer outcrop in Jiashi County, Xinjiang. A series of lapis were filled with Silurian by filling and levelling up，and some Silurian formation still remained in part of karst depression.All these characters express that this area develop karst of Middle Caledonian.In the light of modern geomorphology and karst theory and according to different hydrodynamic conditions，we can divide the second period karst profile into epi-karst zone, vertically filtering zone and horizontally potential flow zone. Developmental law of palaeokarstsubterranean river and developmental extent of cavern in this area are identified. Owing to the master control element of tectonic movement to vertical karst zonation,effectively fractured/caverned reservoir in Bachu area can be predicted on condition of the tectonic background.

Key words: , cycle of karst development；karst surface of the platform；vertical karst zonation；Xikeer

CLC Number:

TE122.2

FENG Hai-Xia, LI Shu-Xin, CHEN Dong-Mei, HE Hu, ZHOU Cai-Hong. The Study of Karst Zonation in Yingshan Formation of Lower Ordovician in Xikeer, Xinjiang[J]. Geoscience, 2010, 24(6): 1065-1071.

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