CAJ | 학술논문

延长东部矿权区延长组长4＋5油层组是该区目前主要的产油层之一，其储集层类型主要为三角洲平原上发育的分流河道沉积砂体。根据岩心薄片和扫描电镜观察，研究区长4＋5储层成岩演化强度大，目前主要处在晚成岩A期一晚成岩B期早期，主要经历的成岩作用有压实作用、胶结作用、交代作用和溶蚀作用等。成岩作用对储层物性影响分析认为，早成岩阶段的机械压实作用和晚成岩阶段的碳酸盐胶结作用是使储集层物性变差的主要原因，而贯穿整个成岩作用阶段的溶蚀作用对储层储集性能的改善至关重要。
연장동부광권구연장조장4＋5유층조시해구목전주요적산유층지일，기저집층류형주요위삼각주평원상발육적분류하도침적사체。근거암심박편화소묘전경관찰，연구구장4＋5저층성암연화강도대，목전주요처재만성암A기일만성암B기조기，주요경력적성암작용유압실작용、효결작용、교대작용화용식작용등。성암작용대저층물성영향분석인위，조성암계단적궤계압실작용화만성암계단적탄산염효결작용시사저집층물성변차적주요원인，이관천정개성암작용계단적용식작용대저층저집성능적개선지관중요。
Yanchang 4＋5 member of Yanchang Formation is one of most important produc- inghorizon at present, in the east of Yangchang diggings. The reservoir belongs to distributary channel deposition of meandering river delta intrafacies. Based on using thin-section analysis, scanning electron microscope, the study on the diagenesis course indicates that diagenet- ic evolution has a strong intensity, and it is now in late diagenetic phase A to early B. The sandstone had undergone campaction, cementation, metasomasis, dissolution, etc. The re- search of diagenesis impact physical property of reservoir suggests that the compaction in early diagenetic period and the cementation of carbonate in late diagenetic period are primary causes which makes physical property worse. But the dissolution that throughout the whole diagenetic period is crucial for improvement of reservoir properties.