影响低渗透砂砾岩油藏初期产能的地质因素——以克拉玛依油田五3中区克下组油藏为例  

Analysis on geological factors influencing early productivity of low permeability conglomerate reservoir-a case of Wu 3 Zhong T_2k_1 reservoir of Karamay oilfield

作　　者：邓强[1,2] 侯加根[2] 唐衔[2,3] 

机构地区：[1]中国石油西南油气田分公司川西北气矿,四川江油621709 [2]中国石油大学(北京)资源与信息学院,北京102249 [3]中化集团石油勘探开发公司,北京100031

出　　处：《油气地质与采收率》2010年第3期95-98,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项课题"大型油气田及煤层气开发"(2008ZX05014)

摘　　要：低渗透强非均质砂砾岩油藏初期生产特征变化明显,具有平面、纵向差异大的特点。以克拉玛依油田五3中区克下组油藏为例,在分析该类油藏初期生产特点及初期产能分布特征的基础上,结合沉积储层精细刻画成果,研究了影响低渗透砂砾岩油藏初期产能的地质因素。结果表明,该类油藏初期产能的主要影响因素是沉积微相,其中主槽和辫流线是有利的高产能微相,槽滩、砂岛及漫洪带等微相初期产能较低。应用沉积微相内部细分流动单元的方法,进一步对比分析表明,同一沉积微相内初期产能受流动单元控制,总体来说Ⅰ类流动单元初期产能最高,Ⅱ类中等,Ⅲ类较差,Ⅳ类最差。Low permeability and high heterogeneous conglomerate reservoir has obvious characteristics in early productivity with high planar and vertical difference.Based on the analysis of the early productivity characteristics and distribution of the early productivity,this paper take Wu 3 Zhong T_2k_1,reservoir of Karamay oilfield as an example,and analyzed the study results of the sedimentary reservoir,and then demonstrated that early productivity of this kind of reservoir is controlled by sedimentary micro-facies.Major trough and braided stream is the favorable sedimentary micro-facies which show high early productivity,however,the early productivity is low in trough beach,sand island and flood land.Sedimentary micro-facies may be further divided into flow units,and it is verified by further study that early productivity is more controlled by flow units in the same sedimentary micro-facies,generally speaking,classⅠflow unit is the early highest productivity zone,and classⅡmedium,and classⅢlower,and classⅣthe lowest.

关 键 词：低渗透砂砾岩油藏 初期产能 影响因素 沉积微相 流动单元 克拉玛依油田 

分 类 号：TE313.8[石油与天然气工程—油气田开发工程]