Crystallized anti-channeling well cementation cement slurry and preparation method thereof

The invention relates to crystallized anti-channeling well cementation cement slurry and a preparation method thereof, and belongs to the technical field of oil exploitation. The well cementation cement slurry comprises the following components in parts by weight: 100 parts of oil well cement, 3-6 parts of a crystallizing agent, 0-50 parts of composite quartz powder, 0-100 parts of a density regulator, 3-6 parts of a fluid loss agent, 2-5 parts of a retarder, 1-3 parts of a suspension stabilizer, 0.5-1.2 parts of a dispersing agent, 0.5-1 part of a defoaming agent and 40-62 parts of water. The crystallizing agent is a mixture of aluminate, sulfate and a catalyst. The cement slurry is good in compressive strength, short in static gelling strength transition time and good in early-stage anti-channeling performance; even under long-term high-temperature maintenance, the compressive strength is stable, and good high-temperature strength decline resistance is achieved; further migration of oil, gas and water can b