塔里木盆地麦盖提斜坡构造演化及油气地质意义

doi:10.11743/ogg20110614

Abstract

Abstract:

In order to analyze the favorable conditions of hydrocarbon accumulation and identify favorable plays of Maigaiti slop in Tarim basin,we used the tectonic analytical method of superimposed basins to study the cha- racteristics and genesis of the eastern and western segments of the slope and discussed their hydrocarbon exploration significances based on integration of seismic and well data and analysis of the dynamic evolution of Maigaiti Slope.Multi-stage evolution and differential evolution are the key factors causing the obvious differences between the eastern and western segment in respects of hydrocarbon,migration and accumulation conditions and main exploration targets.The western segment in the Late Hercynian tectonic belts has good preservation conditions,and the up-dip upper Paleozoic lithologic body near the faults are key factor controlling hydrocarbon accumulation and enrichment.The eastern segment is located in the Hetian paleo-uplift,where Yubei-1 wellblock is placed in an area with the Middle and Late Caledonian tectonic stress superimposing with the Late Hercynian tectonic stress,providing more favorable conditions for the Ordovician fractured-vuggy reservoir development.The Lower Ordovician exposure in the buried hill zone to the east of Yubei-1 wellblock is covered by a seal of certain thickness which is favorable for the effective preservation of solution pores,vugs and fractures,thus is also a potential exploration target.

Key words: differential tectonic evolution, tectonic belt, carbonate rock, petroleum exploration, Maigaiti Slop, Tarim Basin

CLC Number:

TE121.2

Zhang Zhongpei, Liu Shilin, Yang Ziyu, Li Jianjiao. Tectonic evolution and its petroleum geological significances of the Maigaiti Slop,Tarim Basin[J]. Oil & Gas Geology, 2011, 32(6): 909-919.

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Tectonic evolution and its petroleum geological significances of the Maigaiti Slop,Tarim Basin

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