西峰油田L区长7油藏储层宏观非均质性研究

Research on the Macroscopic Heterogeneity of Chang 7 Reservoir in L Area of Xifeng Oil Field

本文所研究区域长7储层属于深湖和半深湖亚相浊积微相,构造发育不明显,主要以鼻状构造为主,孔隙度和渗透率较低,属于低孔超低渗储层。该区长7储层隔层和夹层较发育,砂体的平面展布受沉积相的控制,孔隙度和渗透率的差异较大,但是高孔、高渗带分布具有一定的方向性,研究区宏观非均质性较强。

The study area of Chang 7 reservoir belongs to the deep lake and half deep lacustrine turbidite facies,tectonic development is not obvious,mainly the nose-shaped structure,its porosity and permeability are low,and so it belongs to the low porosity and low permeability reservoir.The Chang 7 reservoir layer and interlayer are developed,the plane distribution of sand bodies is controlled by sedimentary facies,changes of the porosity and permeability are larger,but the distribution of high porosity and high permeability zone has certain direction,the study area has strong macroscopic heterogeneity.