CAJ | 학술논문

从岩心和各类薄片资料入手，以沉积学和储层地质学为基础，结合各类分析资料，对山东沾化凹陷罗家油田沙四段砂砾岩体储层的沉积特征进行了研究。前人所提出的水下冲积扇和近岸水下扇沉积的认识，忽视了扇形沉积体的水上部分，因而改为扇三角洲沉积更为合适。扇三角洲沉积可进一步细分为扇三角洲平原、扇三角洲前缘和前扇三角洲三个沉积亚相及五个微相，其中水下分流河道沉积微相的储层最为发育。详细阐述了砂砾岩体的岩性、沉积微相等沉积因素对储层物性的影响，其中粒度对砂砾岩储层物性与对砂岩储层物性的影响明显不同。
종암심화각류박편자료입수，이침적학화저층지질학위기출，결합각류분석자료，대산동첨화요함라가유전사사단사력암체저층적침적특정진행료연구。전인소제출적수하충적선화근안수하선침적적인식，홀시료선형침적체적수상부분，인이개위선삼각주침적경위합괄。선삼각주침적가진일보세분위선삼각주평원、선삼각주전연화전선삼각주삼개침적아상급오개미상，기중수하분류하도침적미상적저층최위발육。상세천술료사력암체적암성、침적미상등침적인소대저층물성적영향，기중립도대사력암저층물성여대사암저층물성적영향명현불동。
Based on the sedimentology and reservoir geology, combined with drilling, logging and analytical data, depositional characteristics of sandstone and conglomerate bodies' reservoirs for the fourth member of the Shahejie Formation in the Luojia oilfield are studied in detail. The rusults show unacceptability of some previous cognition. As to depositional environment of fan deposits, the conception of fan delta is better than the nearshore subaqueous fan and the subaqueous alluvial fan. According to the characteristics of sandstone and conglomerate bodies, the fan-deltas can be subdivided into three subfacies and five microfacies. 　　It is elaborated that physical properties of reservoirs are effected by lithological properties, sedimentary microfacies and other factors. The porosity and permeability of reservoirs of sandstone and conglomerate bodies is improved by dissolution of feldspar and carbonate rock-fragments. However, it would be decreased awfully with increase of fine matrix and carbonate contents. A style of parabola is shown in the relationship of the mean grain size with the porosity and permeability of the reservoirs which is greatly different from sandstone reservoirs. The oil-bearing properties of the packsand and the pebbled gritstone with parallel bedding and homogeneous bedding is better than glutinite with wavy bedding and graded bedding. Among all microfacies classified, the best reservoir is developed in subaqueous distributary channels.