镇泾油田长8与长6油层组产能影响因素分析

Factors Affecting Productivity of Chang-8 and Chang-6 Oil-bearing Formations in Zhenjing Oilfield,Ordos Basin

通过岩芯观察描述、铸体薄片鉴定、毛细管压力分析以及扫描电镜等分析测试手段,结合测井解释成果,分析了镇泾油田长6与长8油层组油井产能的差异及其影响因素。结果表明:沉积相带、储层微观特征、裂缝发育程度、封盖条件以及储层伤害等是决定镇泾油田油井产量的关键因素。因此,在镇泾油田长8和长6油层组开发过程中,应根据不同沉积相带及其储层特征的差异,从改进油井施工工艺等方面入手,调整开发方案,改善储层的渗流能力,从而提高油井的产能。

Based on detailed description and observation of drilling cores,identification of blue epoxy resin-impregnated thin sections,capillary pressure measurement and scanning electron microscope analysis,differences and major influence factors on the oil production of Chang-8 and Chang-6 Oil-bearing Formations in Zhenjing Oilfield,southwestern Ordos Basin are analyzed with well logging interpretation.The results indicate that the key factors controlling oil production of Chang-6 and Chang-8 Oil-bearing Formations include facies zone,micro characteristics of the reservoir,development of fractures and fissures,sealing conditions and reservoir damage.Therefore,according to the differences of depositional facies and reservoir micro characteristics,the development and exploitation project should be adjusted,and the percolation capacity of reservoir should be improved to increase the oil productivity of Chang-6 and Chang-8 Oil-bearing Formations based on the improvement of well construction technology.