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通过对华庆地区长6-3储层非均质性进行深入剖析,为该油田开发技术政策的探索提供依据。利用钻、测、录井等资料进行综合分析。结果表明:华庆地区长6-3储层层内变异系数、突进系数、平均级差分别为0.65、6.62、6.14。储层的沉积旋回以复合旋回为主,分层系数和砂岩密度均较低,反映砂岩呈孤立夹层产出。华庆地区长6-3油层组以半深湖-深湖-三角洲沉积环境为主,主要为三角洲沉积体系,渗透率集中分布在0.022 5~1.382 m D范围内。华庆地区长6-3沉积韵律特征有正韵律、反韵律、复合韵律、正复合韵律,华庆长6-3应属于应属于中等-强非均质储层。储层主要发育的孔隙类型有粒间孔,属细喉道和微喉道级别,孔喉关系组合主要为中、小孔-细、微喉型组合。
Through in-depth analysis of Chang 6-3 reservoir heterogeneity in Huaqing area, it provides the basis for the exploration of technology policy of this field. Use drilling, testing, logging and other data for a comprehensive analysis. The results show that the coefficient of variation, coefficient of variation and average level difference of Chang 6-3 reservoir in Huaqing area are 0.65, 6.62 and 6.14 respectively. Sedimentary cycles of the reservoirs are dominated by complex cycles, and the delamination coefficients and sandstone densities are both low, reflecting that the sandstone is isolated and interbed. The Chang 6-3 reservoir in Huaqing area is dominated by semi-deep lacustrine-lacustrine-delta sedimentary environment and mainly consists of deltaic sedimentary system with permeability concentrated in the range of 0.022 5-1.382 mD. There are positive rhythm, inverse rhythm, complex rhythm and complex rhythm in Chang 6-3 depositional rhythm in Huaqing area. Huaqing Chang 6-3 belongs to middle-strong heterogeneous reservoir. The main types of pores in the reservoir are intergranular pores, belonging to the fine throat and micro throat. The pore-throat relationship is mainly composed of medium-small pore-fine and micro-throat.