Research on Well-seismic Characterization of Multi-layer Sandstone Reservoir

Multi-layer sandstone reservoirs are one of the important types of A dilute oil reservoirs. They have reached the middle and later stages of development, with the following characteristics: controlled by multiple multi-level faults, many faults, small fault blocks, small fault block reservoir area; affected by sedimentation, the distribution of sand bodies is discontinuous and the connectivity is poor, resulting in serious reservoir heterogeneity; after long-term water injection scouring, the reservoir properties and oil-water properties have changed, and the remaining oil distribution is complicated. These characteristics determine that the research focus of this type of reservoir is to carry out fine characterization of reservoir well-seismic joints, establish the isochronous stratigraphic framework of the reservoir unit, analyze the characteristics of small faults and microstructures in the reservoir, and describe various sand bodies between wells. The internal heterogeneity and the three-dimensional spatial distribution regularity of the oilfield are used to establish a fine three-dimensional reservoir geological model, which provides strong technical support for revealing the spatial distribution characteristics and laws of the remaining oil.