CAJ | 학술논문

详细分析了川口油田长6储层的成岩作用类型、储层物性演化及影响因素.通过岩石学、铸体薄片、电镜扫描等研究方法说明川口油田长6储层主要成岩作用包括压实-压溶作用、胶结作用、交代蚀变作用及溶蚀作用等,成岩阶段属晚成岩A期.其中,机械压实作用、化学胶结作用是导致砂岩孔隙度降低、储集性能变差的主要因素.机械压实作用主要表现为软碎屑的塑性变形、颗粒间由点接触向凹凸接触演变;胶结作用表现为浊沸石、绿泥石、粘土矿物、碳酸盐胶结;石英和长石的次生加大、溶蚀作用特别是浊沸石的溶蚀在一定程度上提高和改善了砂岩储集性能.结果表明,影响储层物性的主要因素为沉积作用和成岩作用.
상세분석료천구유전장6저층적성암작용류형、저층물성연화급영향인소.통과암석학、주체박편、전경소묘등연구방법설명천구유전장6저층주요성암작용포괄압실-압용작용、효결작용、교대식변작용급용식작용등,성암계단속만성암A기.기중,궤계압실작용、화학효결작용시도치사암공극도강저、저집성능변차적주요인소.궤계압실작용주요표현위연쇄설적소성변형、과립간유점접촉향요철접촉연변;효결작용표현위탁비석、록니석、점토광물、탄산염효결;석영화장석적차생가대、용식작용특별시탁비석적용식재일정정도상제고화개선료사암저집성능.결과표명,영향저층물성적주요인소위침적작용화성암작용.
The authors made a detailed analysis of the diagenesis types,physical property evolution and its influencing factors of Chang 6 reservoir of the Chuankou oilfield. According to petrography, thin section analysis and scanning electrical microscopy analysis, the diagenesis mainly includes compaction-pressolution, cementation, metasomatic alteration and denudation, and its diagenetic stage is on phase A of the late diagenetic stage. Among these, compaction and chemical bond are the main factors to cause the sandstone porosity reduction and the accumulation capability degradation. The compaction is mainly demonstrated as the plastic deformation of soft debris, and the evolution from the point contact of granular particles to concave-convex contact of granular particles. The cementation is mainly displayed as aedelforsite cementation, chlorite cementation, hydrosyalite cementation, carbonate cementation, quartz secondary enlargement and feldspar secondary enlargement. The denudation, especially the aedelforsite corrosion, enhances the sandstone accumulation capability. The main factors that influence the reservoir physical property are sedimentation and diagenesis.