China University of Petroleum

Shengda Shen

Yuhuan Bu

Huajie Liu

Shenglai Guo

Chang Lu

Rui Ma

Xinyang Guo

Xun Shan

A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.

Method of cement for well cementing in penetrated hydrate layer

Cement performance evaluation device and cement design method for cementing in penetrated hydrate deposit

Growing community of inventors

Qingdao, China

Shengda Shen