子长油田中庄区长6储层非均质性研究

Research on Chang 6 Reservoir Heterogeneity in Zhongzhuang Area of Zichang Oilfield

从储层宏观与微观非均质性入手,对子长油田中庄区长6储层的砂体、孔隙度和渗透率的空间分布,以及孔隙结构和孔隙类型的进行研究,并建立了储层的三维地质模型。层内非均质性主要受沉积、渗透率以及夹层分布等的影响;平面非均质性特征受砂体及沉积微相展布影响较大,沿河道延伸方向非均质性较好。研究区内主要发育残余粒间孔和溶蚀孔。研究认为主力油层长61在层内、层间、平面上和微观孔隙上,都存在较强的非均质性。

Through analysis of the reservoir macro and micro heterogeneity,Chang 6 reservoir sand bodies,spatial distribution of porosity and permeability,pore structure and types in Zhongzhuang area of Zichang oilfield were studied,and reservoir three-dimensional geological model was established.The results show that the in-layer heterogeneity is mainly affected by the deposition,permeability and mezzanine distribution;plain heterogeneity characteristics are mainly affected by the distribution of sand body and sedimentary micro-facies,and the heterogeneity is better along the river channel extending.The pore types are mainly residual intergranular pores and dissolved pores in study area.The studies suggest that the major reservoir Chang 61 has strong heterogeneity.