The invention relates to well-cementing and self-healing
cement slurry for an oil-gas field, which is suitable for the field of
oil well cementation. The well-cementing and self-healing
cement slurry comprises the following additives percentage by weight: 2-4% of fluid loss agent, 5-40% of self-healing component, 0.2-1.0% of stabilizing agent, 0.5-2.0% of dispersing agent, 0.3-1.0% of de-
foaming agent, and 0.03-0.5% of retarding agent by taking the weight of
cement as benchmark. A preparation method of the well-cementing and self-healing
cement slurry is as follows: controlling the
water cement ratio to be 0.44, uniformly mixing the additives at a low shearing speed, weighing a certain amount of cement, adding into
slurry preparation liquid, and mixing with API (American
petroleum institute) standards to obtain the well-cementing and self-healing
cement slurry. The well-cementing and self-healing
cement slurry has the characteristics of low water loss, adjustable thickening time, gas channeling prevention and excellent impervious performance and the like, has the functions of crack prevention and
self healing, and remarkably improves the
mechanical property of the cement.