Sequence Strata of Lower Cretaceous in Baiyinchagan Depression, Erlian Basin

XU Shu tang; MA Wei min; WANG De ren; JIN Guang xing; LI Ji dong; YANG Yu e

Based on drilling, logging and seismic data, classification correlation of sequence strata has been performed. Formation of lower Cretaceous can be divided into 3 super sequences and 6 tertiary sequences. Lithology, sedimentary facies, system development and formation stacking have also been studied. After these study we could clearly understand the background of sequence formation, deposition evolution, development of source reservoir seal and their association. It is believed that the evolution of Baiyinchagan depression began at its early stage with inherited development and reached its peak at late stage. The depression lasted three flooding, forming three sets of source rocks, which developed 4 types of sandbody with 3 sets of reservoir seal assemblage.

1. China University of Geoscience, Beijing 100083;

2. Zhongyuan Oilfield Company, SINOPEC, Puyang, Henan 457001

Received Date: 2003-10-04

Rev Recd Date: 2004-02-24

Publish Date: 2004-12-10

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Abstract: Based on drilling, logging and seismic data, classification correlation of sequence strata has been performed. Formation of lower Cretaceous can be divided into 3 super sequences and 6 tertiary sequences. Lithology, sedimentary facies, system development and formation stacking have also been studied. After these study we could clearly understand the background of sequence formation, deposition evolution, development of source reservoir seal and their association. It is believed that the evolution of Baiyinchagan depression began at its early stage with inherited development and reached its peak at late stage. The depression lasted three flooding, forming three sets of source rocks, which developed 4 types of sandbody with 3 sets of reservoir seal assemblage.

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Sequence Strata of Lower Cretaceous in Baiyinchagan Depression, Erlian Basin

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