Sand washing method for strong-leakage oil-shortage gas well

• Main Authors: FENG GUOJIANG, DAI CHAOYONG, PEI BOLIN, WU JIANCHANG, ZHANG JUAN, ZHANG SONGMEI
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2018
• 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 sand washing method for a strong-leakage oil-shortage gas well. The sand washing method comprises the following steps that portable solid particles are injected into a shaft,a damaged position of a plugging casing, a strong-leakage stratum of a shaft production section and/or some or all of production section shafts are blocked; and a wash pipe is put down for sand washing. The sand washing method for the strong-leakage oil-shortage gas well by injecting the portable solid particles in to the shaft to block the damaged position of the casing pipe and/or the strong-leakage stratum of the shaft production section, the problem of sand washing fluid leaking into the stratum can be effectively solved, and the working effect of tube lowering and sand washing is improved. At the same time, thickening agent flushing fluid or a shield temporary blocking agent is not used, the problem of production reduction of oil mass after sand washing due to the decrease of formation mobility is solved. In