子洲气田山2段储层非均质性研究

以子洲气田山2段(S2段)储层的测井资料为基础,结合沉积相资料,从层内、层间、及平面的非均质性三个方面研究储层的非均质性特征。研究认为,S2段储层内普遍存在夹层,以泥质夹层和致密夹层为主,通过对渗透率非均质性参数的定量计算,认为该储层S23段层内非均质较强,S21段和S22段为相对均质型储层;S2段储层具有较大的分层系数,存在层间隔层,主要为泥质隔层,分布不稳定,具有层间差异性;S2段储层各小层砂体连通性受沉积微相控制,S23段砂体连通性较好,物性分布稳定,平面非均质性差,但是其它小层平面非均质性相对较强。

Study on reservoir heterogeneity of Shan2 reservoir in Zizhou gasfield

Based on the well-logging data of Shan2 reservoir in Zizhou gas field, combining with the sedimentary facies information, the reservoir heterogeneity, including in-layer heterogeneity, interlayer heterogeneity and plane heterogeneity, has been studied. The research presents that interlayer are universally existed in Shan2 reservoir, which are mostly muddy intercalations and compact interlayers. The quantitative calculation of the permeability heterogeneous parameters draws the conclusion that Shan23 reservoir heterogeneity is strong, while Shan21 and Shan22 are relatively homogeneous formation. Shan2 reservoir has a high stratification coefficient, with interlayers mainly muddy and unstable distributed, therefore, differences between the layers exist. The sand body connectivity of the small layers in Shan 2 reservoir is determined by the sedimentary micro-facies. Sand body connectivity of Shan23 is good. Shan23 reservoir, with a stable distribution of physical properties, is featured with poor heterogeneity, while others are of strong plane heterogeneity.