松辽盆地两江地区扶余油层河道储层描述方法与应用

Reservoir Description of River Channel of Fuyu Reservoir in Two-river Area of Songliao Basin

松辽盆地扶余油层储层砂体为河流—三角洲沉积环境的分流河道沉积,储层横向变化剧烈,属低孔、低渗储层,不易预测与识别。针对这一油田勘探、开发的瓶颈,在进行细分小层层序地层和沉积微相等地质研究的基础上,对河道成因、河道宽度进行了解剖,开展了叠后分频处理、各向异性和叠前弹性波阻抗反演预测技术研究,在扶余油层的河道描述方面取得了较好的应用效果。

Sandbody in Fuyu Reservoir is distributary channel deposits of river-deltaic environment.The reservoir changes intensely horizontally and features in low porosity and low permeability,which is difficult to be predicted and identified.For the bottleneck of exploration and development in the oilfield,on the basis of geology study including sublayer sequence stratigraphy and sedimentary microfacies,channel genesis and channel width are analyzed,technical research,such as poststack frequency-divisional processing,anisotropic research,and prestack elastic and acoustic impedance inversion,is carried out,which is applied well in channel description of Fuyu Reservoir.