摘要
作为一种由风化改造而成的油气储层,风化壳储层具有其特殊性。在已有研究成果的基础上,结合全球已发现的风化壳储层,界定了风化壳储层的内涵,提出了三级分类方案,梳理了其全球分布及特征。认为风化壳储层可以分为隆升风化型和基岩风化型,在全球不同地区和层系上均有分布;岩性几乎包括了碎屑岩、碳酸盐岩、岩浆岩及变质岩的所有岩石类型,表现出明显的多样性;储集空间类型复杂多样,孔隙(洞)型、裂缝型、孔缝复合型等均有发育;不同岩性的风化壳具有较独特的纵向结构和微观组构,纵向上形成了不同的层次结构和储集空间组合;平面上形成区域性分布的大型油气藏。中国含油气盆地的多旋回叠合发育了多期大中型不整合面,风化壳储层分布广泛,油气勘探潜力大;东部断陷—坳陷型叠合盆地风化壳油气勘探应以基岩风化型为主,中西部克拉通—前陆型叠合盆地风化壳油气勘探应以隆升风化型为主。
Weathering crust reservoir has special characteristics.Combined with the discovered weathering crust reservoir in the world,the connotation of weathering crust reservoir was defined,three-level classification was made,and its characteristics and global distribution were present.The weathering crust reservoir can be subdivided into two types:uplift weathering crust reservoir and basement weathering crust reservoir.The weathering crust reservoir is distributed to almost all of the oil-gas province in the world and geologic eras.The lithology of the weathering crust reservoir includes clastic rock,carbonate,magmatic rocks,and metamorphic rock.The type of the reservoir space is included in pores or hole,fracture and fractured pores.The weathering crust of different lithology forms different hierarchical structure and reservoir space combination,and large scale distribution.Multiperiod large and medium sized unconformities developed in superimposed basins in China.It leads to wide distribution and great exploration potential of weathering crust reservoir in China.It is main to prospect basement weathering crust in the superimposed rift basins in eastern China,and uplifting weathering crust in the superimposed craton-foreland basins in the middle and western China.
作者
毛治国
崔景伟
綦宗金
王京红
苏玲
MAO Zhiguo;CUI Jingwei;QI Zongjin;WANG Jinghong;SU Ling(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;National Energy Tight Oil&Gas Research&Development Center,Beijing 100083,China;Key Laboratory of Petroleum Reservoir,CNPC,Beijing 100083,China;CNPC Greatwall Drilling Company,Beijing 100101,China)
出处
《岩性油气藏》
CSCD
北大核心
2018年第2期12-22,共11页
Lithologic Reservoirs
基金
国家重大科技专项课题"大型地层油气藏形成主控因素与有利区带评价"(编号:2017ZX05001-001)
"岩性地层油气藏沉积体系
储层形成机理与分布研究"(编号:2011ZX05001-002)
国家重点基础研究发展计划项目"中国陆相致密油(页岩油)形成机理与富集规律"(编号:2014CB239000)
中国石油科学研究与技术开发项目"复杂储集体储层非均质性特征与评价技术"(编号:2016B-0304)联合资助
关键词
风化壳储层
隆升风化型
基岩风化型
含油气盆地
weathering crust reservoir
basement weathering
uplifting weathering
oil-gas bearing basin
