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姬塬油田长8油层属于鄂尔多斯盆地上三叠统延长组,近年来成为鄂尔多斯盆地姬塬地区勘探潜力较大的含油层位之一,薄片及测试表明研究工区长8层孔隙类型以粒间孔为主,偶见次生溶孔,孔隙度约为5.3～10.2%,渗透率约为0.02～12.6×10-3um3,总体上该储层属于低孔、低渗储层。分析姬塬油田中胶结物对长8油层的物性特征以及影响因素,达到预测有利储层、优选目标区域的目的,对于油气挖潜具有重大的意义。
The Chang 8 oil layer in Jiyuan Oilfield belongs to Yanchang Formation of Upper Triassic in the Ordos Basin, and has become one of the oil-bearing reservoirs with high exploration potential in Jiyuan area of Ordos Basin in recent years. The thin slices and the tests show that the 8 types of pore types in the study area have intergranular pores Mainly secondary porosity, the porosity is about 5.3% to 10.2%, and the permeability is about 0.02 ~ 12.6 × 10-3um3. Generally speaking, the reservoir belongs to low-porosity and low-permeability reservoirs. It is of great significance for oil and gas exploration potential to analyze the physical characteristics and influencing factors of the cement in the Changyuan 8 reservoir in the Jiyuan oilfield so as to predict the favorable reservoir and optimize the target area.