Buried Giant Arc-shape Structure System and Petroleum Exploration in Turpan-Kumul Basin

YANG Zhan-long,HUANG Yun-feng,WU Qing-peng,HUANG Xiao-peng,HAN Xiao-feng,NIU Hui-yun

doi:10.11764/j.issn.1672-1926.2014.08.1156

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 8: 1156 - 1163

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.08.1156

Buried Giant Arc-shape Structure System and Petroleum Exploration in Turpan-Kumul Basin

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North Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Lanzhou 730020,China

Received date: 2013-08-12

Revised date: 2013-09-25

Online published: 2014-08-10

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Abstract

Based on the analysis of regional stress fields and structure distribution in Yanshan and Himalayan periods,with the technique of structural trend analysis by axial surface mapping,it is concluded that a huge arc-shape structure system mainly consisting of three local arc-shape structure belts is buried in east-west direction in the sedimentary cover of Turpan Depression.With the symmetric centre of stress break belt in the middle of depression,the petroleum geological features are comparable and symmetrical in west and east phases of the arc-shape structure system,which attached the three main hydrocarbon-rich sags (Shengbei,Qiudong and Xiaocaohu Sags).The structure of basin is obviously characterized by different sections in west-east and various belts in north-south.The change of regional and local stress fields is the main reason for the formation of this type of structure scheme.Because of the different slip within strata from north to south during Middle to Late Yanshan and Himalaya movements,the structure belt of the west piedmont section is mainly distributed in northwest-southeast and the east,northeast-southwest.The left and right cycles of stress fields in west and east sections result in the formation of arc structure system in plane.There are three different arc-shape structure belts formed within Turpan depression from north to south,which formed a huge arc-shape structure system.The extrusion faults in EW development are good sealing elements of structure traps.The strike-slip faults in NS development are good hydrocarbon transporting elements of structure traps because they cut through the Lower Jurassic hydrocarbon source rocks of Shuixigou Formation.The conclusion of this buried giant arc-shape structure system largely changes the overall understanding of tectonic framework of Turpan Depression.The opinions of the comparability and symmetry in EW of this huge arc-shape structure belt system are favorable for understanding the future exploration domains of Turpan-Kumul Basin.

Key words：

Arc-shape structure system; Stress field; Structural trend analysis by axial surface mapping; Hydrocarbon exploration domain; Turpan-Kumul Basin

Cite this article

YANG Zhan-long,HUANG Yun-feng,WU Qing-peng,HUANG Xiao-peng,HAN Xiao-feng,NIU Hui-yun . Buried Giant Arc-shape Structure System and Petroleum Exploration in Turpan-Kumul Basin[J]. Natural Gas Geoscience, 2014 , 25(8) : 1156 -1163 . DOI: 10.11764/j.issn.1672-1926.2014.08.1156

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