珠江口盆地NH25油藏沉积微相研究  

Sedimentary microfacies in the NH25 reservoir of the Pearl River Mouth Basin

作　　者：薛永超[1] 程林松[1] 梁卫 刘伟新 

机构地区：[1]石油工程教育部重点实验室中国石油大学,北京102249 [2]中海油深圳分公司,广东广州510240

出　　处：《特种油气藏》2010年第5期22-25,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2008ZX05024)

摘　　要：以岩心描述为基础,综合各种分析化验资料,对珠江口盆地NH25油藏岩石学特征、岩石相特征、生物遗迹化石等方面开展深入研究。结果表明储层成分成熟度较高,结构成熟度中等,发育6种岩石相,海生迹遗迹化石丰富、分布广泛,成岩作用较弱,对物性影响不大。综合确定研究区属滨岸相临滨亚相沉积,进一步分为上临滨、中临滨、下临滨,利用孔隙度和渗透率对沉积微相进行定量识别。沉积微相与油藏开发关系表明:上临滨产能高于中临滨,中临滨产能高于下临滨产能,下临滨和中临滨及不同沉积微相过渡区是剩余油富集区。The NH25 reservoir in the Pearl River Mouth Basin is studied in depth in respects of petrology,rock facies and biological trace fossils based on core description and analysis data. The result indicates that the compositional maturity of reservoir rock is high,the textural maturity is moderate; there are 6 types of rock facies; thalassinoides trace fossils are abundant and widely distributed; reservoir diagenesis was weak and didn’t have much impact on reservoir physical property. It is defined that the study area can be attributed to shoreface subfacies of littoral facies,further divided into upper shoreface,middle shoreface and lower shoreface. Porosity and permeability are employed to quantitatively identify sedimentary microfacies. The relationship between sedimentary microfacies and reservoir development shows that the productivity of the upper shoreface is higher than the middle shoreface,the middle shoreface is higher than the lower shoreface,and remaining oil stays in the lower and middle shoreface and the transitional area of different microfacies.

关 键 词：滨岸相 临滨亚相 岩石相 遗迹化石 剩余油 珠江口盆地NH25油藏 

分 类 号：TE122.2[石油与天然气工程—油气勘探]