摘要
通过对薄片和扫描电镜等资料的综合分析,研究了南堡凹陷1号构造带东一段储层物性特征和沉积、成岩作用对储层物性的控制作用。研究区的储层岩石类型主要为长石岩屑砂岩,孔隙类型主要为粒间溶孔。从沉积作用对储层岩石学特征的控制和沉积微相与储层物性特征的关系2个方面分析了沉积作用对储层物性的控制。物源区、沉积环境和沉积作用决定了储层的岩石学特征和物性特征。沉积相带和物性资料综合分析表明,水下分流河道、河口坝和浊积扇水道3种沉积微相的储层物性最好,为有利储层。在沉积微相内部,识别出复合反韵律型和均质韵律型2种储层物性模式,其中均质韵律型储层物性模式更有利于形成良好储层。成岩作用对储层物性的影响表现在机械压实、胶结和溶蚀作用3个方面,其中溶蚀作用形成大量粒间溶孔,有效改善了储层物性。
Reservoir properties of member one of Dongying group in fracture belt 1 in Nanpu depression are studied by analyzing the data of petrophysical characteristics,combined with thin-section petrography and scanning electron microscopic(SEM). And,it is considered that they are controlled by sedimentation and diagenesis. The main reservoir rock type of the study area is feldsparlithic sandstone, and the main pore type is intergranular porosity. The controlling effect of sedimentation on reservoir is analyzed from two respects; sedimentation controls reservoir lithology characters; and the microfacies types on reservoir lithology characters. The control of sedimentation on reservoir lithology characters is the foundation. Different provenance, different sedimentary environments and sedimentation process determine different lithological characters, which decide directly the petrophysical characteristics of reservoir. The petrophysical properties of submersed channel, mouth bar and turbidite fan channel are the best sedimentary micro-facies which can be good reservoirs. Composite reverse rhythmic are identified in sedimentary micro-facies, and homogeneous rhythmic petrophysical mode is more proper to form favorable reservoirs. Diagenesis influence on reservoir properties is revealed in three aspects: compaction, cementation and dissolution. A large number of interparticle dissolution pores are generated by dissolution which effectively improves the reservoir petrography.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第4期14-17,112,共4页
Petroleum Geology and Recovery Efficiency
基金
中国地质大学(武汉)构造与油气资源教育部重点实验室开放基金"莺歌海盆地东方区黄流组一段非典型海底扇的内部构成及其成因机制研究"(TPR-2011-06)
关键词
储层物性
控制因素
沉积作用
成岩作用
东一段
南堡凹陷
reservoir characters
controlling factors
sedimentation
diagenesis
member one of Dongying group
Nanpu depression
