摘要
二叠系芦草沟组是三塘湖盆地主要的油气储集层,这套储集层岩石类型复杂,纵向变化快,多以薄互层产出,四性(岩性、物性、电性、含油性)对应关系差,规律性不清晰。从微观岩石薄片、铸体薄片、荧光薄片、扫描电镜观察和宏观统计等方面深入研究,认为沉积相控制着芦草沟组岩性分布,岩性控制着裂缝发育程度和规模,储层物性普遍较差,溶孔、晶间孔和微裂缝是油气主要储集空间。
The main reservoir in Santanghu basin (ie the Permian Lucaogou formation) shows complex rock type,verti- cally rapid variation,thin alternating layers,and the four properties (ie lithology,physical property,electric prop- erty and oil - bearing property) match poorly without distinct regularity.It was concluded through careful study that sedimentary facies dominated the lithology distribution of Lucaogou formation,and lithology dominated the develo- ping degree and scale of fractures.The physical property of the reservoir is generally poor.Solutional voids,inter- crystal pores and microfractures are main hydrocarbon storage space.In addition,although the development of frac- tures improves the reservoir physical property,it makes the situation more complex.In this paper,the storage ca- pacifies of fractures and matrix were investigated by three methods,thus the developing scale and regularity of frac- tures were better understood,on the basis of this,the effects and contribution of fractures on productivity were ana- lyzed.
出处
《吐哈油气》
2002年第1期11-16,95-96,共8页
Tuha Oil & Gas
关键词
三塘湖盆地
芦草沟组
沉积相
裂缝
储集能力
Santanghu basin
Lucaogou formation
sedimentary facies
fracture
storage capacity
