Fan delta front reservoir prediction method based on composite sand body configuration model

Abstract

The invention relates to a fan delta front reservoir prediction method based on a composite sand body configuration model, which comprises the following steps: 1) determining a fan delta front composite sand body configuration element by research on the coring wells and sedimentary facies in a work area, dividing and identifying a configuration unit boundary by using a logging curve in combination with dynamic data; 2) according to the above configuration model, determining the boundary of a composite river channel, identifying and dividing a single channel within the composite river channel; 3) finding a developmental estuary dam sand body corresponding to the single river channel, researching configuration unit distribution in isochronous stratigraphic architecture, and identifying each configuration unit; 4) researching the contact relationship and the combination feature of the configuration units in a multi-well profile, the distribution characteristics of the configuration units on the plane, and the distribution direction and scale so as to form fan delta front reservoir prediction. The fan delta front reservoir prediction method can realize the prediction and fine characterization of the composite sand body, lays a solid foundation for the deployment of the well pattern, and provides basis and guidance for the later adjustment and the tapping of the remaining oil.

Description

technical field [0001] The invention relates to an oil field reservoir prediction method, in particular to a fan delta front reservoir prediction method based on a composite sand body configuration model. Background technique [0002] With the deepening of oilfield development, the oilfield has entered a period of high water cut or even extremely high water cut. The water flooding situation on the reservoir plane is complex, the distribution of remaining oil is increasingly scattered and concealed, and the analysis is difficult. The development objects have changed from early oil layer groups to mid-term small layers and even today's single-layer and single-sand bodies. The main contradiction in production has been From interlayer contradictions to intralayer contradictions, and even contradictions between building structures inside sand bodies. Reservoir architecture studies the shape, scale, direction and superposition relationship of different levels of reservoir constit...

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Problems solved by technology

In recent years, domestic scholars have carried out a lot of research work on reservoir architecture, but most of them focus on fluvial facies and delta facies reservoirs

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