渤海海域JZ25-1S太古宇潜山储层特征及其油气产能差异控制因素

精细划分变质岩储层类型，并建立不同类型储层与产能间的关系，对变质岩油田高效勘探开发具有重要意义。基于岩心、薄片、物性、常规测井、成像测井以及生产测井资料，深入剖析了渤海海域JZ25-1S油田太古宇潜山储层类型及其测井响应特征，重点探讨了不同类型储层的产能差异。结果表明：研究区主要发育风化壳型储层、内幕碎裂带型储层和内幕裂缝型储层，分别以溶蚀孔缝、破碎砾间孔以及构造裂缝为主要的储集空间类型，不同的储层具有不同的测井响应特征；定义单位厚度油产能大于2 m³/d为高效渗流储层，风化壳型储层与内幕碎裂带型储层为主要的高效渗流储层，内幕裂缝型储层的渗流能力变化较大；储层类型、裂缝密度、裂缝走向与最大主应力夹角等因素共同控制了变质岩储层的产能差异。

Reservoir Characteristics and Control Factors of Hydrocarbon Production of JZ25-1S Archean Buried-Hill in Bohai Bay Area

For the efficient exploration and development of metamorphic oil fields,it is of great significance to divide the types of metamorphic rock reservoirs and establish the relationship between different types of reservoirs and productivity. Based on the data of core, thin section, physical property, conventional logging, imaging logging,and production logging, the reservoir types,and their logging response characteristics of oil field JZ25-1S in Bohai Bay area were analyzed, and the differences in capacity of different types of reservoirs were discussed. The results show that there are weathering crust type reservoirs, inner-broken reservoirs, and inner-fracture reservoirs developed, and their main space types are dissolution pores-fractures, inter-gravel pores, and structural fractures respectively with different logging response characteristics. The reservoir with capacity greater than 2 m³/d per meter is defined as efficient seepage reservoir. The weathering crust and the inner broken zone are the main effective seepage reservoirs, and the seepage capacity of the inner fractured reservoirs changes greatly. The reservoir type, fracture density and the direction of fracture strike, and the main stress direction control the capacity difference of the metamorphic rock reservoirs