Combination flooding method according to correction of capillary number curve

• Main Author: QI LIANQING
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2012
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a combination flooding method according to the correction of a capillary number curve. A relation curve of the capillary number and the residual oil saturation is established by a flooding experiment to determine the optimal range of the capillary number, and a flooding factor is optimized according to the optimal range of the capillary number. In the process of optimizingthe flooding factor, firstly, well spacing and injection speed are optimized by using a numerical reservoir simulation method to obtain the underground seepage velocity; secondly, the reference rangeof underground working viscosity is given according to the field construction condition, and the interfacial tension of a flooding system and the underground working viscosity are optimized by using the safety factor and efficiency coefficient; and finally, the well spacing, the injection speed, the underground working velocity and the interfacial tension of the flooding system are determined according to the optimized flo