Differences of Hydrocarbon Accumulation Periods in Silurian of Tazhong Northern Slope, Tarim Basin
Wang Qianru
Chen Honghan
Zhao Yutao
Tang Daqing
Abstract：Hydrocarbon accumulations of Silurian had obvious differences between shun 10 and shun 9 well blocks due to the influence of multi-cycle tectonic activity in Shuntuoguole area of Tarim basin.Researchers used a variety of technical methods to conduct an in-depth study of the Silurian accumulation period in the study area,but no consensus has yet been reached.On the basis of diagenesis and diagenetic sequences,hydrocarbon filling sequence and charging history in shun 10 and shun 9 well blocks are determined by fluid inclusion system analysis and burial history projection combined with micro FT-IR,microscopic fluorescence and cathodeluminescence analysis in this study.Results show that the shun 9 well block displays three oil-charging stages including Late Caledonian (419.6-398.1 Ma),Late Hercynian (271.5-224.0 Ma) and the Himalayan (11.4-1.1 Ma),while shun 10 well block displays only two oil-charging stages including Late Caledonian (419.6-408.4 Ma) and Late Hercynian (271.6-236.8 Ma).3D seismic interpretation of strata section and faults in shun 9 well block shows that,NE strike-slip faults in Tazhong northern slope are important migration system for hydrocarbon migration in the Silurian,which determines the industrial oil output in this area.Hence,the key target for hydrocarbon exploration in the Silurian lies in reservoirs charged in the Himalayan.
Keywords：Silurianmicro FT-IRfluid inclusionbitumenTarim basinpetroleum geology
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：17( 577-593 )