摘要
运用沉积学和高分辨率层序地层学理论,在岩心、测井、薄片、扫描电镜观察的基础上,对大庆长垣泉三、四段扶余油层储层特征进行研究。研究结果认为,该区发育下游曲流河、网状河和浅水三角洲3种沉积相,岩性为岩屑质长石砂岩和长石质岩屑砂岩;物性特点为低孔、超低渗透。影响储集性能的因素主要表现为2方面:平面上主要受沉积相带的控制;纵向上主要受成岩作用的影响,"底钙"降低了河道砂岩的储集性能,而溶蚀孔隙的出现在一定程度上改善了储集性能。该研究成果对今后扶余油层的进一步勘探有重要的指导意义。
The characteristics of the Q3 and Q4 members of Fuyu reservoir in Changyuan area,Daqing Oilfield are studied based on sedimentology and high resolution sequence stratigraphy as well as cores,logging,thin sections and SEM observations.The study found that three sedimentary facies had developed in the study area,which are downstream meandering river,braided channel and shallow water delta,with syrosem arkose and feldspathic litharenite being the main lithology,showing properties of low porosity and ultra low permeability.The two main factors affecting reservoir properties are sedimentary facies in horizontal dominance and diagenesis in vertical dominance.The 'bottom calcium' deteriorated the reservoir properties of channel sand while the presence of dissolved pores improved reservoir properties.The study results will be of guiding importance to further exploration in Fuyu reservoir.
出处
《特种油气藏》
CAS
CSCD
北大核心
2012年第1期58-61,138,共4页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"细粒
低渗透储层沉积成因类型与分布地质预测技术"(2009ZX05009-002)
关键词
储层特征
主控因素
沉积微相
扶余油层
大庆长垣
reservoir characteristics
main control factor
sedimentary microfacies
Fuyu reservoir
Changyuan area of Daqing Oilfield
