Method for predicting productivity of fractured oil and gas reservoir

• Main Authors: PENG GENBO, HU BUQIN, TANG JIZHOU, LI YUWEI, CONG ZIYUAN, DU TONG
• Format: Patent
• Language: Chinese; English
• Published: 04.08.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; DETECTING MASSES OR OBJECTS; ELECTRIC DIGITAL DATA PROCESSING; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR; TESTING

The invention discloses a method for predicting the productivity of a fractured oil and gas reservoir. The method comprises the steps of 1, collecting data and constructing a sample data set; step 2, initial stress displacement condition; 3, fluid pressure in the initial crack is calculated; 4, the construction time is calculated through a mass conservation equation; 5, deploying natural fractures, and judging the activation condition of the natural fractures when the hydraulic fractures extend to the natural fractures; 6, if the result time obtained in the step 3 does not reach the construction design time, returning to the step 1 for recalculation; if the construction design time is reached, exporting hydraulic fracture parameters, natural fracture parameters and stratum parameters to a. Xlsx file; seventhly, a fracture network formed after hydraulic fracturing when on-site natural fractures exist is reduced; and 8, carrying out iterative solution by combining a Darcy seepage equation and a water storage mo