Abstract: An intelligent identification method of aquifer distribution in complex edge-water oil and gas reservoirs is provided. The problem, that targeted water control countermeasures cannot be proposed due to unclear identification of edge-water distribution in complex edge-water reservoirs, is resolved. Based on geological data and production data of a single well, establish a numerical simulation model of a water influx unit for simulating inflow dynamic of complex edge-water influx; by a genetic algorithm, correct characteristic parameters of an aquifer unit, including volume and water influx of the aquifer unit; automatically fit dynamic production data calculated by the model with actual dynamic production data, to obtain optimal characteristic parameters of the aquifer unit; and assign the characteristic parameters to the aquifer unit for inversion to determine aquifer distribution.

Abstract: The present disclosure relates to a prediction method for constant production decline of a water-producing gas well in a highly heterogeneous reservoir.

Abstract: An intelligent identification method of aquifer distribution in complex edge-water oil and gas reservoirs is provided. The problem, that targeted water control countermeasures cannot be proposed due to unclear identification of edge-water distribution in complex edge-water reservoirs, is resolved. Based on geological data and production data of a single well, establish a numerical simulation model of a water influx unit for simulating inflow dynamic of complex edge-water influx; by a genetic algorithm, correct characteristic parameters of an aquifer unit, including volume and water influx of the aquifer unit; automatically fit dynamic production data calculated by the model with actual dynamic production data, to obtain optimal characteristic parameters of the aquifer unit; and assign the characteristic parameters to the aquifer unit for inversion to determine aquifer distribution.

Abstract: An intelligent water invasion tracking and early warning method for water-gas reservoirs includes based on the gas-water two-phase seepage equation, obtaining the water invasion constant and the water flooding index by combining the gas-water two-phase permeability expression with the water invasion material balance method, fitting by automatic fitting method, finding a best fitting between an optimal theoretical value and an actual value, dividing a block into different water invasion areas based on the water flooding index, revising a water invasion classification boundary based on production dynamic monitoring and well logging interpretation results, and tracking and early warning water invasion by drawing a water flooding index distribution map of water-gas reservoirs according to the water flooding index. The present invention solves the problem of no method for tracking and predicting the water invasion direction and the water invasion intensity in real time.

Abstract: An intelligent water invasion tracking and early warning method for water-gas reservoirs includes based on the gas-water two-phase seepage equation, obtaining the water invasion constant and the water flooding index by combining the gas-water two-phase permeability expression with the water invasion material balance method, fitting by automatic fitting method, finding a best fitting between an optimal theoretical value and an actual value, dividing a block into different water invasion areas based on the water flooding index, revising a water invasion classification boundary based on production dynamic monitoring and well logging interpretation results, and tracking and early warning water invasion by drawing a water flooding index distribution map of water-gas reservoirs according to the water flooding index. The present invention solves the problem of no method for tracking and predicting the water invasion direction and the water invasion intensity in real time.