普光气田南部双庙区块储层特征与评价

Reservoir characteristics and evaluation of Shuangmiao area to the South of Puguang gas field

对普光气田南部双庙场构造嘉陵江组二段及飞仙关组四段储层的岩石组合、储集空间类型、孔隙结构、孔隙分布等特征进行研究,同时进行了储层评价及孔隙度与白云石和粒屑含量相关性探讨。结果表明:嘉二段储层以白云岩储层为主,飞四段储层则以灰岩储层为主;飞四段和嘉二段储层主要储集空间类型为孔隙-裂缝型和裂缝型,嘉二段裂缝较飞四段发育;嘉二段和飞四段储层具有较强非均质性,分布特点也不相同。其中,嘉二段物性相对较好,飞四段相对较差;嘉陵江组储层孔隙度与白云石化程度之间呈明显的正相关关系,为三段式,与粒屑含量之间也呈明显的正相关关系,为近二段式。

The characteristics of rock association, reservoir space, pore structure, pore distribution of Jia 2 and Fei 4 reservoir in Shuangmiaochang structure, Puguang gas field were expounded. Meanwhile, the study of reservoir evaluation was done, and the correlations among the porosity, dolomite content and grained elastic content were discussed. The results show that Jia 2 reservoir is mainly composed of dolomite, whereas, Fei 4 reservoir is mainly composed of limestone. Jia 2 and Fei 4 reservoirs are mainly pore-fracture and fracture types, and Jia 2 reservoir develops more fractures than Fei 4 reservoir. Jia 2 and Fei 4 reservoirs have strong heterogeneity and different distribution characteristics, in which the physical property of Jia 2 is relatively superior to Fei 4. The relationship between the porosity of Jialingjiang reservoir and the degree of dolomitization shows significant positive correlation in three-steps. Meanwhile, it shows significant positive correlation between the porosity of Jialingjiang reservoir and the grained clastic content too, which is nearly two-steps.