鄂尔多斯盆地环江地区长8储层成藏特征

Reservoir Accumulation Characteristics of Chang 8 Sandstone of Yanchang Formation in Huanjiang Area of Ordos Basin

鄂尔多斯盆地环江地区长8油藏有较大的勘探潜力,为典型的低孔低渗储层;储层孔隙类型多样,通过岩石学特征、填隙物、孔隙类型等描述,对环江地区延长组长8储层特征及影响因素进行研究。认为该区具有良好的开发前景。为超低渗透油藏的有效开发提供了理论依据。

In Huanjiang area of Northern Ordos basin Chang 8 reservoir have great exploration potential and is a typ- ical low permeability and low porosity reservoir. Through the petrology characteristics pore type and description in huanjiang area of Northern extension,reservoir characteristics and influence factors were studied. The results showed that long and reservoir rock was mainly lithic arkose and feldspathic sandstone. Characteristics was a typical low permeability and low porosity reservoir, various types of reservoir pore to intergranular hole, feldspar dissolved hole as the major reservoir space, reservoir by sedimentary facies and diagenesis of the comprehensive effect. Comprehen- sive evaluation of reservoir suggested that the study area had good development prospects. For low permeability res- ervoirs of effective development provided a theoretical basis.