摘要
目的探讨丘陵油田三间房组储层微观孔隙结构对注水开发效果的影响。方法通过铸体薄片、扫描电镜、高压压汞等实验方法进行试验分析。结果Ⅰ,Ⅱ类储层中粒间-溶蚀孔发育,喉道较粗,连通性好,在高含水期之前,是主力产油和吸水层;Ⅲ类储层中粒间-溶孔较发育,喉道较细,连通性较差,但孔喉分布范围比较广,在高含水期以后,该类储层变为主力产油层。结论孔隙的类型、连通情况、孔隙-喉道的组合及微裂隙的存在等方面构成的孔隙微观结构非均质性,是影响研究区注水开发效果的根本原因。
Aim To study the influences of microscopic pore structure of Sanjianfang reservoir on waterflooding in Qiuling oilfield.Methods With the Experimental Methods of casting thin slice,scanning electron microscope and high pressure Hg injection,characteristics of pore structures have been revealed from the microscopic point of view.Results TypeⅠ,Ⅱreservoirs develop combination of intergranular pore-dissolved pore,their throats are wider and their connectivity features are better than others,which are main oil and absorbent reservoirs before the high water cut stage.Intergranular pore-dissolved pore and their connectivity features in type Ⅲ reservoir are poor,but the range of pore is wide and throat is narrow.This type reservoir turns into the main oil reservoir after the high water cut stage.Conclusion Heterogeneity of microscopic pore structure is the root cause of influence on waterflooding effectiveness,which includes pore types,Connectivity,combination of pore and throat,and existence of cracks.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第6期1041-1045,共5页
Journal of Northwest University（Natural Science Edition）
基金
国家重点基础研究发展规划基金资助项目(2003CB214606)
关键词
丘陵油田
三间房组
微观孔隙结构
高压压汞
注水开发效果
Qiuling oilfield
Sanjianfang oil reservoir
microscopic pore structure
high pressure Hg injection
waterflooding effectiveness
