摘要
在岩心观察的基础上,结合镜下薄片、扫描电镜等资料,对建南地区上二叠统长兴组(P3cx)礁滩储层的成岩作用、成岩序列及储层孔隙演化特征进行了深入细致的分析。研究结果表明,P3cx成岩作用主要包括胶结作用、压实-压溶作用、重结晶作用、白云石化作用、溶蚀作用以及破裂作用等。其中胶结、压实-压溶、重结晶作用为破坏性成岩作用,而胶结作用是原生孔隙和大部分次生孔隙的主要破坏者;白云石化、溶蚀、破裂作用是建设性成岩作用,溶蚀作用、破裂作用形成的次生孔隙和裂缝是主要的油气储集空间和运移通道。成岩作用是长兴组礁滩储层的主控因素之一,控制了孔隙的整个演化过程。
On the basis of core observation and in combination with the data of thin sections and SEM(scanning electron microscope),the diagenesis,diagenetic series and pore evolution of Changxing Formation in Jiannan Area were studied attentively.The study result indicated that the diagenesis of Changxing Formation included cementation,compactionpressolution,re-crystals,dolomitization,dissolution and fracturing,in which the cementation,compaction-pressolution, re-crystals were the main destructive diageneses and the cementation was the main destruction of primary pores and majority of secondary pores.The dolomitization,dissolution and fracturing were the constructive diageneses,in which dissolution and fracturing were the main oil-gas reservoir space and migration passage of secondary pores and fractures.Diagenesis is one of the main control factors of reef-bank reservoirs,it controls the whole pore evolution.
出处
《石油天然气学报》
CAS
CSCD
2013年第11期27-30,5,共4页
Journal of Oil and Gas Technology
基金
国家"十二五"科技重大专项(2011ZX05007-002-001)
关键词
建南地区
长兴组
成岩作用
成岩序列
孔隙演化
Jiannan Area
Changxing Formation
diagenesis
diagenetic series
pore evolution
