Abstract: The invention relates to a method of determining a dominant hydrocarbon migration mechanism in a sedimentary basin, using a numerical basin simulation simulating a hydrocarbon migration according to at least two migration mechanisms and measurements of physical quantities performed in the basin. A numerical basin simulation and a gridded representations of different states is used to determine a contribution of each hydrocarbon migration mechanism for each state for the cells of the gridded representation of this state.

Abstract: The invention relates to a method for modeling a sedimentary basin, said sedimentary basin having undergone a plurality of geological events defining a sequence of states {Ai} of the basin, each of said states extending between two successive geological events, the method comprising the implementation by data processing means (21) of steps of: (a) Obtaining measurements of physical quantities of said basin, which are acquired from sensors (20); (b) For each of said states Ai, constructing a meshed representation of said basin depending on said measurements of physical quantities; (c) For each of said states Ai, and for each cell of said meshed representation, computing an overpressure in the cell at the end of the state Ai by solving an equation of the Darcy equation type; characterized in that step (c) comprises a prior step (c).

Abstract: The invention relates to a method for modeling a sedimentary basin, said sedimentary basin having undergone a plurality of geological events defining a sequence of states {Ai} of the basin, each extending between two successive geological events, the method comprising the implementation by data processing means (21) of steps of: (a) Obtaining measurements of physical quantities of said basin, which are acquired from sensors (20); (b) For each of said states Ai, constructing a meshed representation of said basin depending on said measurements of physical quantities; (c) For each of said states Ai, and for each cell of the meshed representation, 1. computing an effective stress applied to the cell at the end of the state Ai; 2. computing an overpressure in the cell at the end of the state Ai depending on said effective stress computed at the end of the state Ai.

Abstract: A method for mapping a complex sedimentary basin is disclosed. A grid representative of the current architecture of the basin is constructed. A mechanical structural restoration is applied in three dimensions so as to reconstruct the past architectures of the basin from the current time up to a geological time t. A simulation of the geological and geochemical processes that govern the formation of a petroleum reservoir is then carried out, directly in the grids obtained from the restoration, from the geological time t to the current one. This simulation is thereafter used for mapping the sedimentary basin so as to identify zones of the basin where hydrocarbons may have accumulated.

Abstract: A method for simulating flows in reservoirs, such as hydrocarbons, by means of chimera type grid which fluid generates a chimera grid made up of a set of elementary grids for accounting for characteristics of the flows and of the geometry (e.g., radial grid in the well zone and CPG grid for the reservoir) so that their union covers the entire simulation domain and that there is a minimum overlap between two neighboring elementary grids. Interpolation parameters allowing connection of the flows calculated on the grid to the flows calculated on the neighboring grids are then determined on the border of each elementary grid. Finally, flows are simulated within the reservoir and the well, and the variables describing the flow on the border of the overlap zones are interpolated using the interpolation parameters.

Abstract: A method for mapping a complex sedimentary basin is disclosed. A grid representative of the current architecture of the basin is constructed. A mechanical structural restoration is applied in three dimensions so as to reconstruct the past architectures of the basin from the current time up to a geological time t. A simulation of the geological and geochemical processes that govern the formation of a petroleum reservoir is then carried out, directly in the grids obtained from the restoration, from the geological time t to the current one. This simulation is thereafter used for mapping the sedimentary basin so as to identify zones of the basin where hydrocarbons may have accumulated.

Abstract: Method for simulating flows in reservoirs by means of chimera type grids. The method first consists in generating a chimera grid made up of a set of elementary grids capable of taking account of the various characteristics of the flows and of the geometry (radial grid in the well zone and CPG grid for the reservoir for example) in such a way that their union covers the entire simulation domain and that there is a minimum overlap between two neighbouring elementary grids. Interpolation parameters allowing to connect the flows calculated on this grid to the flows calculated on the neighbouring grids are then determined on the border of each elementary grid. Finally, flows are simulated within the reservoir and the well, and the variables describing the flow on the border of the overlap zones are interpolated using the interpolation parameters. Application: simulators for hydrocarbon reservoirs for example.

Abstract: An automatic pipe gridding method allowing implementation of codes for modelling fluids carried by pipes is disclosed which has for example an application for oil pipes. The method comprises, considering a minimum and a maximum grid cell size, subdividing the pipe into sections including bends, positioning cells of minimum size on either side of each bend, positioning large cells whose size is at most equal to the maximum size in the central portion of each section, and distributing cells of increasing or decreasing size on the intermediate portions of each section between each minimum-size cell and the central portion. The method preferably comprises a prior stage of simplification of the pipe topography by means of weight or frequency spectrum analysis, so as to reduce the total number of cells without affecting the representativeness of the flow model obtained with the grid pattern.

Abstract: Automatic pipe gridding method allowing implementation of codes for modelling fluids carried by these pipes.

Abstract: The invention provides a model representative of steady and transient flows, in a pipe, of a mixture of multiphase fluids, which takes account a set of variables defining the properties of the fluids and of the flow modes having separate phases which are dispersed and intermittent, and the dimensions and slope of the pipes. The modeled quantities characterizing the flow are determined by solving a set of transport equations, an equation of mass conservation per constituent and an equation of momentum of the mixture, and by using a hydrodynamic model and a hydrodynamic model of the fluids. The models are formed by considering the mixture to be substantially at equilibrium at all times and that the constituents of the multiphase mixture are variable all along the pipe. The method can be applied to hydrocarbon transportation network study and to determination of characteristics of flow of the multiphase mixture in the pipe.

Abstract: The invention relates to a method for forming a simulation model of two-phase flow in pipelines and notably in pipelines carrying hydrocarbons. The method comprises solving mass conservation equations for each of the phases and an equation of momentum conservation of the flow, while complying with closing relations. An explicit solution is used on slow waves (corresponding to the propagation of a gas phase) and fast waves (corresponding to the propagation of the pressure waves), which has the advantage of allowing time interval control by the slow waves while keeping the accuracy on these waves inherent in an explicit scheme. The method thus combines model execution speed and accuracy of results. The method can be applied to the design of a hydrocarbon transportation network.