柴达木盆地北缘潜西地区古近系储层发育特征及主控因素  

Reservoir characteristics and controlling factors of Paleogene in Qianxi area in northern margin of Qaidam Basin

作　　者：杨永剑[1] 刘家铎[1] 孟万斌[1] 祝贺[1] 

机构地区：[1]成都理工大学"油气藏地质及开发工程国家重点实验室"

出　　处：《岩性油气藏》2010年第B12期60-65,共6页Lithologic Reservoirs

基　　金：国家科技重大专项(编号:2008ZX05002-004)资助

摘　　要：依据钻井、测井资料,对岩心进行测试分析发现,潜西地区古近系储层主要成分为成熟度较低的岩屑长石砂岩和长石岩屑砂岩,次生溶蚀孔隙为储层的主要储集空间,包括溶蚀粒间孔、粒内溶孔及铸模孔等。该地区储层孔隙度平均为10.1%,渗透率平均为21.64mD,属低孔、低渗储层,且非均质性强。储层发育受沉积相和成岩作用的双重影响,前者对储层的发育起宏观控制作用,在辫状河河道所发育的储层物性相对较好;后者对储层的发育起决定性作用,压实作用和胶结作用破坏了储层的储集性能,溶蚀作用和破裂作用改善了储层的储集性能。Based on the drilling, logging data and core test analysis, it is concluded that the reservoir component of Paleogene in Qianxi area mainly are lithic arkose and feldspathic litharenite with low maturity, and the reservoir spaces mainly are secondary dissolved pore including intergranular dissolved pore, intragranular dissolved pore and casting pore. The average porosity of the reservoir is 10.1%, and the average permeability is 21.64 mD. The Paleogene reservoir is low porosity and low permeability reservoir with strong heterogeneity. The reservoir is influenced by sedimentary facies and diagenesis. Sedimentary facies plays a role in macro control of the reservoir development, and the reservoir developed in braided channel has relative good properties. Diagenesis plays a decisive role in the reservoir development. Compaction and cementation destruct the capacity of the reservoir, while denudation and cataclasis improve the performance of the reservoir.

关 键 词：储层特征 控制因素 潜西地区 柴达木盆地北缘 

分 类 号：TE121.3[石油与天然气工程—油气勘探]