The Cambrian Sequence Stratigraphy Framework andSource-Reservoir—Caprock Association of Bachu Uplift in Tarim Basin

doi:10.3863/j.issn.1674 – 5086.2011.04.009

西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (4): 53-58.DOI: 10.3863/j.issn.1674 – 5086.2011.04.009

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The Cambrian Sequence Stratigraphy Framework andSource-Reservoir—Caprock Association of Bachu Uplift in Tarim Basin

YANG Yong-jian1， 2， LIU Jia-duo3， TIAN Jing-chun3， MENG Wan-bin3， ZHU He3

1. Post-doctoral Research Station， Southwest Petroleum Branch， SINOPEC， Chengdu， Sichuan 610081， China； 2. Research Instituteof Exploration and Production， Southwest Petroleum Branch， SINOPEC， Chengdu， Sichuan 610081， China； 3. State Key Laboratoryof Oil and Gas Reservoir Geology and Exploitation， Chengdu University of Technology， Chengdu， Sichuan 610059， China

Received:1900-01-01 Revised:1900-01-01 Online:2011-08-20 Published:2011-08-20

Abstract

Abstract: Based on comprehensive analysis of the outcrops， wells data， seismic explanation data， and guided with
sequence stratigraphy theory， the sequence stratigraphy of Bachu Uplift Cambrian is divided into fourteen 3rd-
order sequences and three 2nd-order sequences which belong to type I sequence and were constituted by TST and
HST. In the Cambrian period， the sedimentary environment is mainly showed as alternating deposition of restricted
platform-evaporation platform， the water depth is mainly showed as the northwestern margin is relatively deep and
the southeast is shallow. On the basis of above， this paper discusses the characteristics of source-reservoir-cap rock
and its rule of combination on the basis of sequences stratigraphic framework， the results show that there are 1 set
of source rock， 3 sets of reservoir and 2 sets of cap developed in the Cambrian in the study area. The source rock
is SS1 HST， reservoirs are SS1 HST， SS2 TST， SS3 TST and HST， caps are SS1 HST， SS2 HST. They combined
into 2 sets of good source-reservoir-caprock assemblages. In addition， most dolomites in the outcrops or in the drill
core have been changed by hydrothermal， and the greater intensity of hydrothermal alteration， the more developed
dissolution pores. Therefore， in some of the places where intense tectonic activities happened， hydrothermal then
began to change the rock by migration. At last， it formed good reservoirs.

Key words: Tarim Basin, Bachu Uplift, Cambrian, sequences Stratigraphic, source-reservoir-cap rock assemblage11

CLC Number:

TE122.2

YANG Yong-jian;;LIU Jia-duo;TIAN Jing-chun;MENG Wan-bin;ZHU He. The Cambrian Sequence Stratigraphy Framework andSource-Reservoir—Caprock Association of Bachu Uplift in Tarim Basin[J]. 西南石油大学学报(自然科学版), 2011, 33(4): 53-58.

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The Cambrian Sequence Stratigraphy Framework andSource-Reservoir—Caprock Association of Bachu Uplift in Tarim Basin

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