CAJ | 학술논문

运用测井资料分析、岩心观察、铸体薄片鉴定、扫描电镜、X-衍射、压汞测试等技术手段，对鄂尔多斯盆地环县-南梁地区三叠系延长组长4+5油层组储层成岩作用进行研究。结果表明：研究区长4+5储集砂体以长石砂岩和岩屑长石砂岩为主，处于中成岩阶段的 B 期；主要成岩作用类型包括压实作用、胶结作用、溶解作用及交代作用。其中，压实作用、胶结作用是原生孔隙度降低、物性变差的主要原因，分别使平均孔隙度减小17.9%及14.49%，而溶蚀作用可使平均孔隙度增加4.12%，对于砂岩储集性能的改善具明显作用。
운용측정자료분석、암심관찰、주체박편감정、소묘전경、X-연사、압홍측시등기술수단，대악이다사분지배현-남량지구삼첩계연장조장4+5유층조저층성암작용진행연구。결과표명：연구구장4+5저집사체이장석사암화암설장석사암위주，처우중성암계단적 B 기；주요성암작용류형포괄압실작용、효결작용、용해작용급교대작용。기중，압실작용、효결작용시원생공극도강저、물성변차적주요원인，분별사평균공극도감소17.9%급14.49%，이용식작용가사평균공극도증가4.12%，대우사암저집성능적개선구명현작용。
The Physical Properties and diagenesis in Chang 4+5 reservoir of the Huanxian-Lanliang Area in Ordos Ba-sin are studied by varied methods, including sandstone cast thin section, scanning electron microscopy, X-ray analysis, the pressure mercury analysis techniques. Feldspathic and lithic feldspathic sandstones are chiefrock types. The reservoir diagenesis reaches B-period of middle diagenesis stage. The main diagenetic types include compaction, cementation, dis-solution and metasomatism, among them, compaction and cementation are the main reason for 17.9% and 14.49% of the average porosity decreases, secondary porosity formed by dissolution has improved sandstone reservoir performance sig-nificantly,and increase 4.12% in average porosity.