摘要
通过对陕北富县探区 1 5口井的各种分析化验资料进行了深入的研究 ,认为延长组砂岩主要经历了未成熟期的压实作用和次成熟期的成岩矿物析出及其所引起的胶结作用 ,成熟早期的溶蚀和次生孔隙形成及晚期成岩强化四个阶段 ,后者是形成次生孔隙发育时期。延长组砂岩主要孔隙类型有剩余粒间孔、长石溶孔、岩屑溶孔、碳酸盐溶孔和大量微孔 ,其次还有高岭石晶间孔、网状粘土晶间孔。其中剩余粒间孔占比例最大 ,其次为成熟早期成岩自生矿物溶蚀而形成的次生孔隙。
All the analysis data or 15 wells in Fuxian acreage(north of Shanxi province) have been studied. It indicates that sandstone of Yanchang formation mainly went four steps: compaction in immatured phase. precipitation of diagenetic mineral in submatured phase and its cementation, erosion in early matured phase, formation of induced pore and diagenesis in late period. The main types of sandstone pore for Yanchang formation are remainder intergranular pore, solutional void in feldspar, solutional void in detrtus, solutional void in carbonate and many micropores. Above all, there are also inercrystal pore in kaolinite and clay. Among these pores, remainder intergranular pore takes the most percentage, the second is induced pore fomed in early matured phase when erosion of authigenic mineral happened. Key word: Shanbei Fuxian Acreage diagenetic mieral reservoir property type of pore Yanchang Fm
出处
《内蒙古石油化工》
CAS
2001年第3期153-155,共3页
Inner Mongolia Petrochemical Industry
