摘要
本文采用地面与地下地质、静态地质与动态生产资料相结合的方法,分析并讨论了控制阳新统碳酸盐岩致密储层的古岩溶、断裂和压溶作用等非均质因素。建立了三个级次的储层模式。依据孔隙、溶洞和裂缝在储集体中的分布和配置关系,建立了11种可能的渗流介质储层模式。应用上述模式对气田生产资料和压力恢复曲线进行了正演研究,初步证明了模式的实用价值。
Heterogeneous factors that control the paleo-karstification,pressure solutionand fracturing of tight Yangxin carbonate reservoirs are explored,and three grades of reservoir models are established in this paper based on geolo-gical data of south Sichuan.The distribution and origin of these specialreservoirs such as paleokarst,colluvial breccia and stratiform coral reef areproposed according to Emei taphrogenesis.The main factors leading to thetightness of Yangxin carbonate rocks are pressure solution and cementation,in which the structures of the pressure solution can be summarised into 4types and 6 kinds.The development of the fractures in the carbonate rocksunderwent three stages,correspondingly formed three fracturing reservoir bo-dies such as fracture swarms,dense fracture zones(potential faults)andfaulted breccia zones.In accordance with the distribution and association ofthe pores,vugs(or cavities)and fractures,the authors have constructed 11potential models of vadose medium reservoirs.These models are proved to beessentially effective in analysing pressure-rebuilding curves and subsurfacegeology of gas field.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
1989年第4期366-376,共11页
Oil & Gas Geology
