大安北地区扶余油层复杂致密油藏特征及成因分析  

Reservoir Characteristics and Genetic Analysis of Fuyu Oil Layer in Daanbei Area

作　　者：李松泽[1] 胡望水[1] 陈佩佩[1] 谭欣雨[2] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [2]中原油田采油五厂,濮阳457001

出　　处：《科学技术与工程》2015年第1期23-29,共7页Science Technology and Engineering

基　　金：国家自然科学基金项目(41340030)资助

摘　　要：结合油田实际地质情况,在沉积储层特征、油气分布规律研究的基础上,总结大安北地区扶余油层油藏特征;并对其成因进行了探讨。研究结果表明,大安北地区扶余油层为典型的低-特低孔、超低渗致密储层,储层非均质化严重。导致其油藏特征复杂的根本原因为:1源下多期成藏,各期原油在黏度、密度、组分上均有差异;2砂体在空间上的复杂叠置、接触关系造成的侧向差异输导;3断裂活动期的纵向输导体系造成圈闭类型、规模、油气充注丰度及分布上的差异。基于此,提出"源内倒灌—纵向断裂输导—构造有利部位聚集"的成藏模式,并指出以密集断裂带作为油气优势运移通道的断层组合两侧构造高点或砂体尖灭部位是油气聚集成藏的有利部位,可做为下一步油藏预测与开发的重点目标区。Considering the geological situation of Jilin oil field and based on the study of the sedimentary reservoir characteristics and the causes of complex dense reservoir formation,the causes of the reservoirs accumulation is discusse.The studies prove that the Fuyu oil layer in Daanbei area is a typical tight sandstone reservoir with lowsupper low porosity,ultra-low permeability and reservoir heterogeneity is serious.The main reasons of the reservoirs complexity are：①Multistage reservoir formation below the hydrocarbon source,the viscosity,the density and the components is different; ②The differentiated lateral migration of sand bodies spatial overlay and the contact reltions ; ③Vertical transportation systems during the active period of faults caused several types and sizes of the trap and the hydrocarbon filling abundance and the distribution are also different.Besed on the research,the reservoir accumulation pattern is concluded as ＂transmitted from the upper hydrocarbon source rocks-Longitudinal conduction of faults-Accumulation in favorable structure＂.The structural high in faults combination with the advantage of oil and gas migration path and the pinch out site of the sandbodies is the best accumulation area of the hydrocarbon where is the key target zone of reservoir prediction and development in the next step.

关 键 词：油藏特征 成藏模式 致密储层 非均质性 扶余油层 大安北地区 

分 类 号：TE122.2[石油与天然气工程—油气勘探]