古城地区奥陶系鹰山组白云岩储层特征及其控制因素  

Characteristics and their controlling factors of Ordovician dolomite reservoir in Yingshan Formation in Gucheng area

作　　者：张亚金[1] 张湘娟[1] 张振伟[1] 曹彦清[1] ZHANG Yajin;ZHANG Xiangjuan;ZHANG Zhenwei;CAO Yanqing(Exploration and Development Research Institute of Daqing Oilfield Co Ltd, Daqing 163712, China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2020年第4期1-8,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份公司重大科技专项“塔东天然气成藏理论及勘探配套技术研究”(2016E-0204)。

摘　　要：古城地区奥陶系鹰山组储层发育受多种作用影响,储层发育特征及控制因素认识不清。在岩心观察、测井资料、岩石薄片、储层物性等分析基础上,开展了鹰山组白云岩储层主要特征及影响因素研究。结果表明:鹰山组白云岩储层主要发育在台地边缘滩相和台内滩相高能颗粒云岩中,储集空间主要为晶间孔、溶孔、溶洞、溶缝,储集类型主要为裂缝—孔洞型,以Ⅱ类储层为主,低孔、低渗,孔渗相关性差;储层发育主要受沉积相、溶蚀作用、构造作用和海平面升降变化等因素控制;沉积相带为奥陶系鹰山组白云岩储层的形成提供了物质基础,白云岩化作用是形成有效的白云岩储层的必要条件;溶蚀作用、构造作用和海平面升降变化决定了储层储集性能,是优质储层形成的关键。The development of Ordovician reservoir in Yingshan Formation of Gucheng area is impacted by multiple actions,and moreover the developed characteristics and their controlling factors have not made clear up to now.On the basis of the analyses of the core observation,logging data,rock thin sections,reservoir physical properties and so forth,the studies on the main characteristics and influencing factors of Yingshan-Formation dolomite reservoirs were conducted.The results show that the dolomite reservoirs are mainly developed in the high-energy grain dolomite of the beach facies of the platform edge and intra-platform,the principal accumulating spaces include intercrystal pores,solution pores,solution holes and solution fissures,the accumulating type mainly refers to fracture-pore one i.e.TypeⅡreservoir characterized by low porosity and low permeability,and moreover the correlation between the porosity and permeability is rather bad;the reservoir development is mainly controlled by the sedimentary facies,dissolution,tectonic action,sea level changes and so forth;the sedimentary facies belt provides the material basement for the generation of Ordovician Yingshan-Formation reservoir,the dolomitization is the necessary condition of the formation of the effective dolomite reservoir;the dissolution,tectonic action and sea level changes determine the reservoir accumulating performances and furthermore become the key to the development of the high-quality reservoirs.

关 键 词：古城地区 鹰山组 白云岩 储层特征 控制因素 

分 类 号：TE122.2[石油与天然气工程—油气勘探]