COMPUTER-IMPLEMENTED METHOD FOR DETERMINING A VELOCITY IMAGE OF A DOMAIN OF THE SUBSURFACE STRUCTURAL GEOLOGY IN AN OIL AND GAS RESERVOIR

    公开(公告)号:US20210231820A1

    公开(公告)日:2021-07-29

    申请号:US17161077

    申请日:2021-01-28

    Abstract: A computer-implemented method for determining a velocity image of a domain of the subsurface structural geology in an oil and gas reservoir comprising an iterative method that combines a migration step and a population step propagating values from regions of the image wherein the velocity is known, or the velocity is according to information being deemed as correct. In this field of the technology this kind of data is also known as hard data. The iterative process uses a seismic image in depth of an initial guess as initial velocity model in a conjunction with tensor properties to generate a new velocity model based on criteria of minimum residual moveout on a specific point(s) or well control location(s). At these locations data information (velocity) is considered as well-known a-prior information to be propagated around the neighborhood guided taking into account the geological structure.

    COMPUTER IMPLEMENTED METHOD FOR MANIPULATING A NUMERICAL MODEL OF A 3D DOMAIN

    公开(公告)号:US20200334404A1

    公开(公告)日:2020-10-22

    申请号:US16643050

    申请日:2018-08-28

    Abstract: The present invention is related to a computer implemented method for manipulating a numerical model of a 3D domain, said numerical model comprising geometrical entities such as layers, fractures, discontinuities, facies, etc., being identified as geometrical entities because they can be defined by its shape. The resulting data storage block is very large. The management of such large data bases or data storage block may be unaffordable as simple operations over one or more geometrical entities require the processing of the entire data base. The method provides an efficient management of the data base by a set of specific lists of indexing keys increasing the speed of access, for instance for writing and reading operations, for one or more determined geometrical entities.

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