摘要
乌什凹陷神木1井白垩系舒善河组储层主要为扇三角洲平原—前缘河道的岩屑细砂岩、含砾岩屑砂岩、砂砾岩,岩心及测井平均孔隙度约为9%,为低孔低渗、特低孔特低渗储层。通过镜下分析发现,神木1井白垩系5118.8～5143.05m井段还存在薄层石英(质)砂(砾)岩,并且在5108.05～5117.83m井段碳酸盐岩岩屑颗粒含量高。总体上,舒善河组孔隙不发育,以粒间孔为主,粗岩性中发育压碎缝及构造缝,对神木1井产能贡献较大。
The Cretaceous Shushanhe Formation in Shenmu-1 well in Wushi sag is mainly fine litharenite,pebbly sandstone & sandstone-conglomerate in plain and front channel bed of fan delta.The average porosity of well logging and core analysis is about 9% and the reservoir is characterized by low porosity and low permeability.Observed by microscopic chips,the Cretaceous segment of 5118.8m^5143.05m in Shenmu-1 well has high amount of Carbonate grain,and high content of carbonate debris particles at 5108.05~5117.83m.The Shushanhe Formation with undeveloped pores is mainly dissolution pore,structural fractures and crush fractures develop in thick rocks,which contribute a lot to the productivity of Shenmu-1 well.
出处
《中国石油勘探》
CAS
2010年第3期22-24,29,共4页
China Petroleum Exploration
关键词
乌什凹陷
神木1
舒善河组
石英质岩
碳酸盐岩岩屑
压碎缝
Wushi sag
Shenmu-1 well
Shushanhe Formation
quartzite
carbonate debris
crush fractures
