METHOD FOR PREDICTING HYDROCARBON PRODUCTION VOLUMES FROM OIL AND GAS FIELDS USING COMPUTER SIMULATION Russian patent published in 2023 - IPC E21B41/00 E21B49/00 G01V99/00 

FIELD: oil and gas production.

SUBSTANCE: planning and evaluating the effectiveness of an oil and gas field production system and predicting the volume of hydrocarbon production from underground fluid-saturated reservoirs. A method for predicting hydrocarbon production from oil and gas fields using computer simulation, which includes: determining the physical and chemical properties and component composition of fluids based on the results of laboratory studies of fluid samples extracted from the reservoir; determination of fluid mobility in the reservoir based on the results of laboratory filtration studies on a core sample; formation of a computational grid based on data on the geometry of the surfaces of sections of underground layers, discontinuities in the layers, placement and spatial profiles of wells; determination of porosity and reservoir properties of the formation based on the results of filtration experiments on a core sample, as well as a complex of well logging; determination of the elastic and thermophysical properties of the reservoir based on the results of laboratory experiments of the core sample; determination of the initial state of the reservoir based on the data of the interpretation of hydrodynamic (well test) and well logging; setting the well operation mode both on the basis of data from operational reports and on the basis of the dynamics of the value of the planned bottom hole pressure for the forecast period; solution of the system of equations of the model describing the associated hydrodynamic, geomechanical and thermal processes, for each moment of time; calculation of the dynamics of well production, characterized by the fact that in the process of computer simulation, the influence of changes in the stress-strain state of the reservoir on the filtration rate in the rock is taken into account by modifying the conductivity of the faces of the computational grid depending on the stresses of the reservoir; the influence of the component composition on the physical and chemical properties of the fluid is taken into account within the framework of the compositional model; for spatial discretization, an unstructured grid with local refinement near wells and faults is used.

EFFECT: forecasting of hydrocarbon production volumes from oil and gas fields using computer modeling aimed at improving the efficiency of field development and providing the ability to calculate fluid production volumes from wells in complex reservoirs, taking into account the influence of deformation and thermal effects, as well as the complex component composition of the fluid.

1 cl, 1 dwg