【摘要】 准噶尔盆地永进地区侏罗系和白垩系之间普遍存在一套以红色为主的砂泥岩地层,其层位归属和成因争议较大。利用地震区域追踪对比、连井标定和砂层组精细对比、岩心观察、粘土矿物、微量元素和化学蚀变指数等多种方法对该层进行了综合研究。研究结果表明,红层层位属中侏罗统西山窑组,主要是沉积作用形成的,红层是半干旱—半潮湿气候条件下的陆上—滨湖浅水环境的产物,而后期的风化作用较小。在该环境下,碎屑岩储层不含炭屑,增强了在成岩过程中的抗压实性,为永进地区6 000m深度依然存在相对高孔渗储层创造了条件,提高了勘探前景的评价,为该区有利储层的评价与预测提供了依据。更多还原

【Abstract】 A set of sand-mudstone formation,mainly in red color,is commonly found between Jurassic and Cretaceous strata in Yongjin area,Junggar Basin.Its stratigraphic horizon ownership and genesis are greatly disputed.A comprehensive research to the red beds has been carried out including seismic regional tracing contrast,connecting-well calibration,fine correlation of sand group,core observation,clay mineral,trace elements and chemical index of alteration,etc.The results show that,it is in the Jurassic Xishanyao formation formed by sedimentation, which was the products of onshore-shallow lakeshore in semiarid-semi-humid condition,while later weathering was little.Because the clastic reservoir has no charcoal fragment under this environment,its anti - compaction was enhanced during the process of diagenesis.So high porosity and permeability reservoirs also exist under the depth of 600m in Yongjin area.This may provide more profitable exploration prospect, and lots of basis for the evaluation and prediction of favorable reservoir.更多还原