Cement slurry for shale gas development oil-based drilling fluid well cementation technology

The invention provides cement slurry for a shale gas development oil-based drilling fluid well cementation technology. The cement slurry comprises head slurry and tail slurry which are injected into the head end and the tail end of a cement paste section plug. The head slurry comprises the following raw materials in parts by weight: 100 parts of G-class portland cement, 27-67 parts of fresh water, 1-2 parts of a solid fluid loss agent, 10-20 parts of an enhancer, 2-5 parts of latex, 0.5-1 part of a latex stabilizing agent, 1-3 parts of a dispersing agent, 4-8 parts of an enhanced channeling prevention agent, 0.5-1 part of a retarder and 0-30 parts of a lightening admixture; the tail slurry comprises the following raw materials in parts by weight: 100 parts of G-class portland cement, 20-27 parts of fresh water, 4-8 parts of an enhanced channeling prevention agent, 0.5-1 part of a dispersing agent, 1-2 parts of a solid fluid loss agent, 1-2 parts of an expanding agent, 10-15 parts of latex, 1-2 parts of a late