Coupling Relationship between NE Strike-Slip Faults and Hypogenic Karstification in Middle-Lower Ordovician of Shunnan Area, Tarim Basin, Northwest China
Li Peijun
Chen Honghan
Tang Daqing
Cao Zicheng
Lu Ziye
Su Ao
Wei Huadong
Abstract：The discovery of high yielding SN4 well of natural gas reveals great potential for oil and gas exploration of the deepsuper deep reservoirs in Tarim basin,where the mechanism and distribution of reservoirs remain controversial due to the great burial-depth and low exploration maturity.This paper presents a study from both the macro and micro perspective on this issue.A 3-D seismic fine interpretation is employed to analyze the development of fault structures and the spatial distribution of carbonate reservoirs in Shunnan area of Tarim basin.Combined with the analysis of lithofacies and fluid inclusion,it is concluded that Shunnan area in Tarim basin experienced four major tectonic movements,which happened during early Caledonian,middle Caledonian,late Caledonian-early Hercynian and late Hercynian.The formation and transformation of the NE strike-slip faults were controlled by the tectonic movement of middle Caledonian and Caledonian-early Hercynian.The hypogenic karstification developed in Shunnan area on a large scale,which has a coupling relationship with the NE strike-slip faults.In the plane,the hypogenic karst mainly developed along the SN4 strike-slip faults zones with distinct segmentation.In the section,the hypogenic karstification is developed along the extensional strike-slip faults,and the migration in the transverse direction was mainly controlled by the pre-existing permeable zones which mostly comprised upper Yingshan calcarenite layer.
Keywords：strike-slip faulthypogenic karstificationMiddle-Lower OrdovicianTarim basinShunnan areapetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 93-104 )