Abstract: The invention is a method for exploiting a subterranean formation including hydrocarbons with at least one lithologic facies of the formation having undergone at least one diagenetic phase over geological times. From at least one sample of rock obtained from the formation, from measured production data relating to the formation and from a meshed representation representative of the formation, each mesh of the meshed representation is determined including at least one indicator relating to the distribution of the facies present in the mesh. The method comprises a step of history matching in which at least one of the adjustment parameters is the diagenetic state of the identified facies.

Abstract: A method for operating an oil deposit based on a technique of positioning wells to be drilled is disclosed. Based on a grid representative of the petrophysical properties of a subterranean formation through at least one well is drilled, a reservoir simulation is performed up to a time for which production of the formation being studied is to be predicted. Then, attributes are selected that are representative of the flows in the formation and a classification of these attributes is performed. Then, a quality indicator is computed for each of the classes and at least one class is selected such that its quality indicator is greater than a first threshold.

Abstract: The invention is a method for exploiting a subterranean formation including hydrocarbons with at least one lithologic facies of the formation having undergone at least one diagenetic phase over geological times. From at least one sample of rock obtained from the formation, from measured production data relating to the formation and from a meshed representation representative of the formation, each mesh of the meshed representation is determined including at least one indicator relating to the distribution of the facies present in the mesh. The method comprises a step of history matching in which at least one of the adjustment parameters is the diagenetic state of the identified facies.

Abstract: The invention is a method for exploiting a subterranean formation including hydrocarbons with at least one lithologic facies of the formation having undergone at least one diagenetic phase over geological times. From at least one sample of rock obtained from the formation, from measured production data relating to the formation and from a meshed representation representative of the formation, each mesh of the meshed representation is determined including at least one indicator relating to the distribution of the facies present in the mesh. The method comprises a step of history matching in which at least one of the adjustment parameters is the diagenetic state of the identified facies.

Abstract: The invention relates to a method for exploiting a geological reservoir which may be a reservoir storing gas (for example CO2). The exploitation (EX) of the geological reservoir is carried out according to an exploitation scheme (SE) defined on the basis of a reservoir model (MR) with the reservoir model being matched (CAL) in relation to dynamic data (DD). According to the invention, the reservoir model (MR) is made representative by a multiple-scale parameterization, with at least two reservoir models (MR1, MR2) that have a different number of mesh cells.

Abstract: The invention relates to a method for exploiting (EX) a geological reservoir according to an exploitation scheme (SE) defined on the basis of a matched reservoir model (CAL) with static data and dynamic data. For this method, a first reservoir model (MR) displaying a certain consistency with respect to the flow properties of the medium is preselected. This preselected model (MR) is then used as starting point for the history matching process (CAL).

Abstract: The invention is a method of developing a petroleum reservoir employing a technique for selection of the position of the wells to be drilled. A production indicator map is utilized comprising a set of cells each associated with a production indicator defining impact on fluid production of addition of a well in this cell. The production indicator map is constructed by selecting cells from among the set of cells of the map; determining production indicators in the selected cells; and interpolating the production indicators on the set of cells of the map, by an interpolation model accounting for a distance between the cell to be interpolated and the closest well to the cell to be interpolated. The position of the well to be drilled is defined by the cell where the production indicator is a maximum.

Abstract: The invention is a method using a computer to construct a grid representative of the distribution of a physical property of an underground formation having application to petroleum reservoir development. A set of initial grid cells MI containing at least one conditioning point PC is defined. Each cell MI is then visited and assigned a value representative of the property using a filling method. At least one unvisited cell (MNV1, MNV2) adjacent to at least one already visited cell MV is then identified, and the number N of adjacent cells MV is determined for each cell (MNV1, MNV2). Each cell (MNV1, MNV2) is then visited and filled according to the decreasing values of N. The stages of identification and filling of cells (MNV1, MNV2) are repeated until each cell of the grid has been visited.

Abstract: A method for operating an oil deposit based on a technique of positioning wells to be drilled is disclosed. Based on a grid representative of the petrophysical properties of a subterranean formation through at least one well is drilled, a reservoir simulation is performed up to a time for which production of the formation being studied is to be predicted. Then, attributes are selected that are representative of the flows in the formation and a classification of these attributes is performed. Then, a quality indicator is computed for each of the classes and at least one class is selected such that its quality indicator is greater than a first threshold.

Abstract: A method for optimizing the development of a fluid reservoir by means of an accelerated reservoir study. A geological model is constructed. A reservoir model is then constructed by upscaling the geological model. The links between cells of the geological model and a cell of the reservoir model where they are contained are determined and stored. Flow simulations are carried out by computer-implemented reservoir simulator, the reservoir model and the links. The above stages are then repeated without repeating the link determination, by modifying parameters of the reservoir study to optimize the development scheme. Finally, the reservoir is developed according to this optimized development scheme.

Abstract: The invention relates to a method of developing an underground reservoir, notably a petroleum reservoir, traversed by at least a first well from which a fluid is produced, wherein a position of at least a second well to be drilled is determined by means of a production indicator map comprising a set of cells, each cell being associated with a production indicator defining an impact, on the fluid production, of a well addition in this cell. The method comprises constructing the map by: a) determining production indicators on a first group of cells of the map; b) determining production indicators on a second group of cells of the map; c) interpolating said production indicators on all the cells of the map; and defining the position of the second well by the cell where the production indicator is maximal.

Abstract: The invention is a method using a computer to construct a grid representative of the distribution of a physical property of an underground formation having application to petroleum reservoir development. A set of initial grid cells MI containing at least one conditioning point PC is defined. Each cell MI is then visited and assigned a value representative of the property using a filling method. At least one unvisited cell (MNV1, MNV2) adjacent to at least one already visited cell MV is then identified, and the number N of adjacent cells MV is determined for each cell (MNV1, MNV2). Each cell (MNV1, MNV2) is then visited and filled according to the decreasing values of N. The stages of identification and filling of cells (MNV1, MNV2) are repeated until each cell of the grid has been visited.

Abstract: A method of developing a petroleum reservoir according to a given development scheme, from a facies map representative of the reservoir. New measurements are taken in the reservoir to better characterize it. A geostatistical simulator is selected. A set of random numbers is then identified which are provided to the geostatistical simulator to provide a facies representation identical to the initial map by inverting a random number generation algorithm of the simulator. The map is then modified to account for the new measurements, by carrying out a geostatistical simulation constrained by the measurements, with the geostatistical simulator and the set of random numbers. Finally, the reservoir development scheme is modified by accounting for the modified map, and the reservoir is developed using the modified development scheme.

Abstract: The invention is a method for real-time updating of a geological model using dynamic data while maintaining the coherence thereof with static observations. An initial set of reservoir property maps, obtained from stochastic simulations of a random function, are available. Parameters providing new realizations of the random function when applied to the set are selected. New maps are created using initial values of the parameters. As soon as new dynamic data are available, the parameters are modified to reduce a difference between the simulated data for perturbed models and the measured data. Finally, the reservoir is developed using a modified development scheme to account for the deformed maps.

Abstract: A method of developing a petroleum reservoir, wherein a facies map representative of the reservoir is constructed from petrophysical property maps. A grid cell visiting order is defined by selecting the visiting order that first passes through the cells where the facies are the most discriminated. Then, in each cell i, according to the visiting order, and for various facies values k, the likelihood defined by the probability of obtaining in cell i the values of observed petrophysical properties is calculated, knowing that the facies in cell i is facies k, and knowing on the one hand already identified facies values V*<i and, the values of the petrophysical properties of the previously visited cells. The facies value that maximizes the likelihood in cell i is associated with each cell i of the grid.

Abstract: The invention IS a method for exploiting (EXP) a geological reservoir by using a reservoir model consistent with a geological model (MG). Reservoir models (MRn) are constructed by using different upscaling methods. By utilization of a connectivity study, conducted on the basis of an algorithm resolving the shortest path (DIS) applied to the meshings, the main flowpaths are identified between the wells for the geological model (MG) and for the different reservoir models (MRn). The reservoir model (MR) for which the lengths of the main flowpaths between wells are closest to those obtained for the starting geological model is then selected.

Abstract: A method is disclosed for operating an oil pool based on a reservoir model gradually deformed by means of cosimulations. A map of a property of the pool is obtained by a stochastic simulation of a first random function. A correlation coefficient is chosen between the first random function and a second random function with an identical mean and covariance. The map is modified by a cosimulation of the two random functions by using the correlation coefficient. The correlation coefficient is modified and the cosimulation step is reiterated to deform the map and minimize a matching objective function. Finally, the pool is operated by implementing an operating scheme accounting for the deformed map.

Abstract: The invention relates to a method for exploiting (EX) a geological reservoir according to an exploitation scheme (SE) defined on the basis of a matched reservoir model (CAL) with static data and dynamic data. For this method, a first reservoir model (MR) displaying a certain consistency with respect to the flow properties of the medium is preselected. This preselected model (MR) is then used as starting point for the history matching process (CAL).

Abstract: A method of modifying a geological model representative of an underground reservoir is disclosed which respects average proportions of the lithologic facies imposed by a production data calibration process which has application to petroleum reservoir development. A geographical zone Z is defined within the geological model and an average proportion in zone Z allowing the production data to be calibrated is determined for k facies, with an optimization process. The proportions of these facies are modified using a block indicator cokriging method constrained by the average proportions to be respected. A new geological model constrained by the modified facies proportions is simulated and the development of the underground medium is optimized by the simulated model.

Abstract: The invention relates to a method for exploiting a geological reservoir which may be a reservoir storing gas (for example CO2). The exploitation (EX) of the geological reservoir is carried out according to an exploitation scheme (SE) defined on the basis of a reservoir model (MR) with the reservoir model being matched (CAL) in relation to dynamic data (DD). According to the invention, the reservoir model (MR) is made representative by a multiple-scale parameterization, with at least two reservoir models (MR1, MR2) that have a different number of mesh cells.