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西峰油田合水区的长8油藏为典型的低孔、特低渗透储层,岩心分析表明该地区渗透率与孔隙度之间的相关性较差。通过砂体和沉积微相的相关数据对其层内非均质性、层间非均质性、平面非均质性进行研究,长813小层、长812小层、长821小层、长823非均质性较强,长811和长822非均质性相对较弱,宏观非均质较强的主要分布于水下分流河道中间或河道拐弯和分叉处,稍次的则主要分布于水下分流河道侧翼,为注水开发提供了依据。
The Chang 8 reservoir in Heshui Oilfield of Xifeng Oilfield is a typical low-porosity and ultra-low permeability reservoir. Core analysis shows that the correlation between permeability and porosity in this area is poor. Based on the data of sand body and sedimentary microfacies, the in-layer heterogeneity, inter-layer heterogeneity and planar heterogeneity were studied. The length of 813, the length of 812, the length of 821, The heterogeneity of 823 is relatively strong, the heterogeneity of 811 and 822 is relatively weak, and the macroscopic heterogeneity is mainly distributed in the middle of the distributary channel or the turning and bifurcation of the channel, while the next is mainly distributed It is a basis for the waterflooding development to divert waterways to the side of the river.