Method for adjusting optimal steam injection speed of heavy oil reservoir steam flooding exploitation

• Main Authors: WANG PENGKUN, LI SAINAN, QIAN YIN, HUANG XIAOLIANG, YAN WENDE, QI ZHILIN, TIAN JIE
• Format: Patent
• Language: Chinese; English
• Published: 21.02.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention discloses a method for adjusting the optimal steam injection speed of heavy oil reservoir steam flooding exploitation. The method comprises the steps of 1, constructing a scouring multiple distribution model; 2, collecting the basic parameters; 3, calculating the average dryness Xi in a steam cavity; 4, calculating the optimal average dryness Xo in the steam cavity; and 5, judging whether the current steam injection speed i is the optimal steam injection speed or not, if Xo is equal to Xi, determining that the current steam injection speed i is the optimal steam injection speed,and if Xo is greater than Xi, reducing the current steam injection speed i to Xo = Xi, and if Xo is less than Xi, increasing the current steam injection speed i to Xo = Xi. By adopting the above scheme, the optimal steam injection speed of a steam injection well is reversely deduced and determined by determining the optimal steam cavity average dryness of a heating area, the optimal steam-driven oil production scheme is p