Carbonate Sequence Stratigraphic Features of Cambrian-Ordovician, Tarim Basin

Abstract

Abstract: The study on top boundary of sequence is very important to carbonate sequence study. The top boundary of carbonate sequence could be divided into the exposed and concordant sequence boundary and the weak exposed and concordant sequence boundary. The weak exposed and concordant sequence boundary is known as A-type sequence boundary, and the sequence is A-type sequence. The exposed and concordant sequence boundary is known as B-type sequence boundary, and the sequence is B-type sequence or AB-type sequence. Through field outcrop survey, core survey, drilling/ logging sequence analysis and comprehensive interpretation of seismic data, the sequence stratigraphic framework of Cambrian-Ordovician of Tarim Basin is established: eight sequences of Cambrian and nine sequences of Ordovician. The Tumuxiuke Formation and the Lianglitage Formation of Cambrian-Lower and Middle Ordovician and the Upper Ordovician are carbonate platform sediments, and the carbonate sequence consists of the sediments of the hemicycle of rising base level and declining base level, which divides the sequences into A-type sequence, B-type sequence and ABtype sequence.

Key words: carbonate, sequence feature, Cambrian-Ordovician, Tarim Basin

CLC Number:

P618.13

Wang Zhaoming, Jiang Renqi, Wu Jincai, Zhang Lijuan and Xiao Zhaohui. Carbonate Sequence Stratigraphic Features of Cambrian-Ordovician, Tarim Basin[J]. China Petroleum Exploration, 2011, 16(1): 9-14,2.

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Carbonate Sequence Stratigraphic Features of Cambrian-Ordovician, Tarim Basin

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